Discussion:
[PATCH 4.19 01/89] phy: Revert toggling reset changes.
(too old to reply)
Greg Kroah-Hartman
2020-03-17 10:54:10 UTC
Permalink
From: David S. Miller <***@davemloft.net>

commit 7b566f70e1bf65b189b66eb3de6f431c30f7dff2 upstream.

This reverts:

ef1b5bf506b1 ("net: phy: Fix not to call phy_resume() if PHY is not attached")
8c85f4b81296 ("net: phy: micrel: add toggling phy reset if PHY is not attached")

Andrew Lunn informs me that there are alternative efforts
underway to fix this more properly.

Signed-off-by: David S. Miller <***@davemloft.net>
[just take the ef1b5bf506b1 revert - gregkh]
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/net/phy/phy_device.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -76,7 +76,7 @@ static LIST_HEAD(phy_fixup_list);
static DEFINE_MUTEX(phy_fixup_lock);

#ifdef CONFIG_PM
-static bool mdio_bus_phy_may_suspend(struct phy_device *phydev, bool suspend)
+static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
{
struct device_driver *drv = phydev->mdio.dev.driver;
struct phy_driver *phydrv = to_phy_driver(drv);
@@ -88,11 +88,10 @@ static bool mdio_bus_phy_may_suspend(str
/* PHY not attached? May suspend if the PHY has not already been
* suspended as part of a prior call to phy_disconnect() ->
* phy_detach() -> phy_suspend() because the parent netdev might be the
- * MDIO bus driver and clock gated at this point. Also may resume if
- * PHY is not attached.
+ * MDIO bus driver and clock gated at this point.
*/
if (!netdev)
- return suspend ? !phydev->suspended : phydev->suspended;
+ return !phydev->suspended;

if (netdev->wol_enabled)
return false;
@@ -127,7 +126,7 @@ static int mdio_bus_phy_suspend(struct d
if (phydev->attached_dev && phydev->adjust_link)
phy_stop_machine(phydev);

- if (!mdio_bus_phy_may_suspend(phydev, true))
+ if (!mdio_bus_phy_may_suspend(phydev))
return 0;

return phy_suspend(phydev);
@@ -138,7 +137,7 @@ static int mdio_bus_phy_resume(struct de
struct phy_device *phydev = to_phy_device(dev);
int ret;

- if (!mdio_bus_phy_may_suspend(phydev, false))
+ if (!mdio_bus_phy_may_suspend(phydev))
goto no_resume;

ret = phy_resume(phydev);
Greg Kroah-Hartman
2020-03-17 10:54:19 UTC
Permalink
From: Mahesh Bandewar <***@google.com>

[ Upstream commit ad8192767c9f9cf97da57b9ffcea70fb100febef ]

IPvlan in L3 mode discards outbound multicast packets but performs
the check before ensuring the ether-header is set or not. This is
an error that Eric found through code browsing.

Fixes: 2ad7bf363841 (“ipvlan: Initial check-in of the IPVLAN driver.”)
Signed-off-by: Mahesh Bandewar <***@google.com>
Reported-by: Eric Dumazet <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ipvlan/ipvlan_core.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)

--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -505,19 +505,21 @@ static int ipvlan_process_outbound(struc
struct ethhdr *ethh = eth_hdr(skb);
int ret = NET_XMIT_DROP;

- /* In this mode we dont care about multicast and broadcast traffic */
- if (is_multicast_ether_addr(ethh->h_dest)) {
- pr_debug_ratelimited("Dropped {multi|broad}cast of type=[%x]\n",
- ntohs(skb->protocol));
- kfree_skb(skb);
- goto out;
- }
-
/* The ipvlan is a pseudo-L2 device, so the packets that we receive
* will have L2; which need to discarded and processed further
* in the net-ns of the main-device.
*/
if (skb_mac_header_was_set(skb)) {
+ /* In this mode we dont care about
+ * multicast and broadcast traffic */
+ if (is_multicast_ether_addr(ethh->h_dest)) {
+ pr_debug_ratelimited(
+ "Dropped {multi|broad}cast of type=[%x]\n",
+ ntohs(skb->protocol));
+ kfree_skb(skb);
+ goto out;
+ }
+
skb_pull(skb, sizeof(*ethh));
skb->mac_header = (typeof(skb->mac_header))~0U;
skb_reset_network_header(skb);
Greg Kroah-Hartman
2020-03-17 10:54:20 UTC
Permalink
From: Hangbin Liu <***@gmail.com>

[ Upstream commit 07758eb9ff52794fba15d03aa88d92dbd1b7d125 ]

When we add peer address with metric configured, IPv4 could set the dest
metric correctly, but IPv6 do not. e.g.

]# ip addr add 192.0.2.1 peer 192.0.2.2/32 dev eth1 metric 20
]# ip route show dev eth1
192.0.2.2 proto kernel scope link src 192.0.2.1 metric 20
]# ip addr add 2001:db8::1 peer 2001:db8::2/128 dev eth1 metric 20
]# ip -6 route show dev eth1
2001:db8::1 proto kernel metric 20 pref medium
2001:db8::2 proto kernel metric 256 pref medium

Fix this by using configured metric instead of default one.

Reported-by: Jianlin Shi <***@redhat.com>
Fixes: 8308f3ff1753 ("net/ipv6: Add support for specifying metric of connected routes")
Reviewed-by: David Ahern <***@gmail.com>
Signed-off-by: Hangbin Liu <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv6/addrconf.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -5706,9 +5706,9 @@ static void __ipv6_ifa_notify(int event,
if (ifp->idev->cnf.forwarding)
addrconf_join_anycast(ifp);
if (!ipv6_addr_any(&ifp->peer_addr))
- addrconf_prefix_route(&ifp->peer_addr, 128, 0,
- ifp->idev->dev, 0, 0,
- GFP_ATOMIC);
+ addrconf_prefix_route(&ifp->peer_addr, 128,
+ ifp->rt_priority, ifp->idev->dev,
+ 0, 0, GFP_ATOMIC);
break;
case RTM_DELADDR:
if (ifp->idev->cnf.forwarding)
Greg Kroah-Hartman
2020-03-17 10:54:21 UTC
Permalink
From: Pablo Neira Ayuso <***@netfilter.org>

[ Upstream commit 84b3268027641401bb8ad4427a90a3cce2eb86f5 ]

Userspace might send a batch that is composed of several netlink
messages. The netlink_ack() function must use the pointer to the netlink
header as base to calculate the bad attribute offset.

Fixes: 2d4bc93368f5 ("netlink: extended ACK reporting")
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/netlink/af_netlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2411,7 +2411,7 @@ void netlink_ack(struct sk_buff *in_skb,
in_skb->len))
WARN_ON(nla_put_u32(skb, NLMSGERR_ATTR_OFFS,
(u8 *)extack->bad_attr -
- in_skb->data));
+ (u8 *)nlh));
} else {
if (extack->cookie_len)
WARN_ON(nla_put(skb, NLMSGERR_ATTR_COOKIE,
Greg Kroah-Hartman
2020-03-17 10:54:22 UTC
Permalink
From: Dmitry Bogdanov <***@marvell.com>

[ Upstream commit 6fc498bc82929ee23aa2f35a828c6178dfd3f823 ]

SCI should be updated, because it contains MAC in its first 6 octets.

Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Dmitry Bogdanov <***@marvell.com>
Signed-off-by: Mark Starovoytov <***@marvell.com>
Signed-off-by: Igor Russkikh <***@marvell.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/macsec.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2886,6 +2886,11 @@ static void macsec_dev_set_rx_mode(struc
dev_uc_sync(real_dev, dev);
}

+static sci_t dev_to_sci(struct net_device *dev, __be16 port)
+{
+ return make_sci(dev->dev_addr, port);
+}
+
static int macsec_set_mac_address(struct net_device *dev, void *p)
{
struct macsec_dev *macsec = macsec_priv(dev);
@@ -2907,6 +2912,7 @@ static int macsec_set_mac_address(struct

out:
ether_addr_copy(dev->dev_addr, addr->sa_data);
+ macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
return 0;
}

@@ -3188,11 +3194,6 @@ static bool sci_exists(struct net_device
return false;
}

-static sci_t dev_to_sci(struct net_device *dev, __be16 port)
-{
- return make_sci(dev->dev_addr, port);
-}
-
static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
{
struct macsec_dev *macsec = macsec_priv(dev);
Greg Kroah-Hartman
2020-03-17 10:54:23 UTC
Permalink
From: Dan Carpenter <***@oracle.com>

[ Upstream commit a3aefbfe45751bf7b338c181b97608e276b5bb73 ]

This is similar to commit 674d9de02aa7 ("NFC: Fix possible memory
corruption when handling SHDLC I-Frame commands") and commit d7ee81ad09f0
("NFC: nci: Add some bounds checking in nci_hci_cmd_received()") which
added range checks on "pipe".

The "pipe" variable comes skb->data[0] in nfc_hci_msg_rx_work().
It's in the 0-255 range. We're using it as the array index into the
hdev->pipes[] array which has NFC_HCI_MAX_PIPES (128) members.

Fixes: 118278f20aa8 ("NFC: hci: Add pipes table to reference them with a tuple {gate, host}")
Signed-off-by: Dan Carpenter <***@oracle.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/nfc/hci/core.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)

--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -193,13 +193,20 @@ exit:
void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
struct sk_buff *skb)
{
- u8 gate = hdev->pipes[pipe].gate;
u8 status = NFC_HCI_ANY_OK;
struct hci_create_pipe_resp *create_info;
struct hci_delete_pipe_noti *delete_info;
struct hci_all_pipe_cleared_noti *cleared_info;
+ u8 gate;

- pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd);
+ pr_debug("from pipe %x cmd %x\n", pipe, cmd);
+
+ if (pipe >= NFC_HCI_MAX_PIPES) {
+ status = NFC_HCI_ANY_E_NOK;
+ goto exit;
+ }
+
+ gate = hdev->pipes[pipe].gate;

switch (cmd) {
case NFC_HCI_ADM_NOTIFY_PIPE_CREATED:
@@ -387,8 +394,14 @@ void nfc_hci_event_received(struct nfc_h
struct sk_buff *skb)
{
int r = 0;
- u8 gate = hdev->pipes[pipe].gate;
+ u8 gate;
+
+ if (pipe >= NFC_HCI_MAX_PIPES) {
+ pr_err("Discarded event %x to invalid pipe %x\n", event, pipe);
+ goto exit;
+ }

+ gate = hdev->pipes[pipe].gate;
if (gate == NFC_HCI_INVALID_GATE) {
pr_err("Discarded event %x to unopened pipe %x\n", event, pipe);
goto exit;
Greg Kroah-Hartman
2020-03-17 10:54:24 UTC
Permalink
From: Willem de Bruijn <***@google.com>

[ Upstream commit 46e4c421a053c36bf7a33dda2272481bcaf3eed3 ]

In one error case, tpacket_rcv drops packets after incrementing the
ring producer index.

If this happens, it does not update tp_status to TP_STATUS_USER and
thus the reader is stalled for an iteration of the ring, causing out
of order arrival.

The only such error path is when virtio_net_hdr_from_skb fails due
to encountering an unknown GSO type.

Signed-off-by: Willem de Bruijn <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/packet/af_packet.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2260,6 +2260,13 @@ static int tpacket_rcv(struct sk_buff *s
TP_STATUS_KERNEL, (macoff+snaplen));
if (!h.raw)
goto drop_n_account;
+
+ if (do_vnet &&
+ virtio_net_hdr_from_skb(skb, h.raw + macoff -
+ sizeof(struct virtio_net_hdr),
+ vio_le(), true, 0))
+ goto drop_n_account;
+
if (po->tp_version <= TPACKET_V2) {
packet_increment_rx_head(po, &po->rx_ring);
/*
@@ -2272,12 +2279,6 @@ static int tpacket_rcv(struct sk_buff *s
status |= TP_STATUS_LOSING;
}

- if (do_vnet &&
- virtio_net_hdr_from_skb(skb, h.raw + macoff -
- sizeof(struct virtio_net_hdr),
- vio_le(), true, 0))
- goto drop_n_account;
-
po->stats.stats1.tp_packets++;
if (copy_skb) {
status |= TP_STATUS_COPY;
Greg Kroah-Hartman
2020-03-17 10:54:25 UTC
Permalink
From: Remi Pommarel <***@triplefau.lt>

[ Upstream commit b723bd933980f4956dabc8a8d84b3e83be8d094c ]

ACS (auto PAD/FCS stripping) removes FCS off 802.3 packets (LLC) so that
there is no need to manually strip it for such packets. The enhanced DMA
descriptors allow to flag LLC packets so that the receiving callback can
use that to strip FCS manually or not. On the other hand, normal
descriptors do not support that.

Thus in order to not truncate LLC packet ACS should be disabled when
using normal DMA descriptors.

Fixes: 47dd7a540b8a0 ("net: add support for STMicroelectronics Ethernet controllers.")
Signed-off-by: Remi Pommarel <***@triplefau.lt>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -34,6 +34,7 @@
static void dwmac1000_core_init(struct mac_device_info *hw,
struct net_device *dev)
{
+ struct stmmac_priv *priv = netdev_priv(dev);
void __iomem *ioaddr = hw->pcsr;
u32 value = readl(ioaddr + GMAC_CONTROL);
int mtu = dev->mtu;
@@ -45,7 +46,7 @@ static void dwmac1000_core_init(struct m
* Broadcom tags can look like invalid LLC/SNAP packets and cause the
* hardware to truncate packets on reception.
*/
- if (netdev_uses_dsa(dev))
+ if (netdev_uses_dsa(dev) || !priv->plat->enh_desc)
value &= ~GMAC_CONTROL_ACS;

if (mtu > 1500)
Greg Kroah-Hartman
2020-03-17 10:54:27 UTC
Permalink
From: You-Sheng Yang <***@canonical.com>

[ Upstream commit d64c7a08034b32c285e576208ae44fc3ba3fa7df ]

Dell USB Type C docking WD19/WD19DC attaches additional peripherals as:

/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
|__ Port 1: Dev 11, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 3: Dev 12, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 4: Dev 13, If 0, Class=Vendor Specific Class,
Driver=r8152, 5000M

where usb 2-1-3 is a hub connecting all USB Type-A/C ports on the dock.

When hotplugging such dock with additional usb devices already attached on
it, the probing process may reset usb 2.1 port, therefore r8152 ethernet
device is also reset. However, during r8152 device init there are several
for-loops that, when it's unable to retrieve hardware registers due to
being disconnected from USB, may take up to 14 seconds each in practice,
and that has to be completed before USB may re-enumerate devices on the
bus. As a result, devices attached to the dock will only be available
after nearly 1 minute after the dock was plugged in:

[ 216.388290] [250] r8152 2-1.4:1.0: usb_probe_interface
[ 216.388292] [250] r8152 2-1.4:1.0: usb_probe_interface - got id
[ 258.830410] r8152 2-1.4:1.0 (unnamed net_device) (uninitialized): PHY not ready
[ 258.830460] r8152 2-1.4:1.0 (unnamed net_device) (uninitialized): Invalid header when reading pass-thru MAC addr
[ 258.830464] r8152 2-1.4:1.0 (unnamed net_device) (uninitialized): Get ether addr fail

This happens in, for example, r8153_init:

static int generic_ocp_read(struct r8152 *tp, u16 index, u16 size,
void *data, u16 type)
{
if (test_bit(RTL8152_UNPLUG, &tp->flags))
return -ENODEV;
...
}

static u16 ocp_read_word(struct r8152 *tp, u16 type, u16 index)
{
u32 data;
...
generic_ocp_read(tp, index, sizeof(tmp), &tmp, type | byen);

data = __le32_to_cpu(tmp);
...
return (u16)data;
}

static void r8153_init(struct r8152 *tp)
{
...
if (test_bit(RTL8152_UNPLUG, &tp->flags))
return;

for (i = 0; i < 500; i++) {
if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
AUTOLOAD_DONE)
break;
msleep(20);
}
...
}

Since ocp_read_word() doesn't check the return status of
generic_ocp_read(), and the only exit condition for the loop is to have
a match in the returned value, such loops will only ends after exceeding
its maximum runs when the device has been marked as disconnected, which
takes 500 * 20ms = 10 seconds in theory, 14 in practice.

To solve this long latency another test to RTL8152_UNPLUG flag should be
added after those 20ms sleep to skip unnecessary loops, so that the device
probe can complete early and proceed to parent port reset/reprobe process.

This can be reproduced on all kernel versions up to latest v5.6-rc2, but
after v5.5-rc7 the reproduce rate is dramatically lowered to 1/30 or less
while it was around 1/2.

Signed-off-by: You-Sheng Yang <***@canonical.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/usb/r8152.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2701,6 +2701,8 @@ static u16 r8153_phy_status(struct r8152
}

msleep(20);
+ if (test_bit(RTL8152_UNPLUG, &tp->flags))
+ break;
}

return data;
@@ -4062,7 +4064,10 @@ static void r8153_init(struct r8152 *tp)
if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
AUTOLOAD_DONE)
break;
+
msleep(20);
+ if (test_bit(RTL8152_UNPLUG, &tp->flags))
+ break;
}

data = r8153_phy_status(tp, 0);
@@ -4180,7 +4185,10 @@ static void r8153b_init(struct r8152 *tp
if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
AUTOLOAD_DONE)
break;
+
msleep(20);
+ if (test_bit(RTL8152_UNPLUG, &tp->flags))
+ break;
}

data = r8153_phy_status(tp, 0);
Greg Kroah-Hartman
2020-03-17 10:54:28 UTC
Permalink
From: Edward Cree <***@solarflare.com>

[ Upstream commit 4b1bd9db078f7d5332c8601a2f5bd43cf0458fd4 ]

It's a resource, not a parameter, so we can't copy it into the new
channel's TX queues, otherwise aliasing will lead to resource-
management bugs if the channel is subsequently torn down without
being initialised.

Before the Fixes:-tagged commit there was a similar bug with
tsoh_page, but I'm not sure it's worth doing another fix for such
old kernels.

Fixes: e9117e5099ea ("sfc: Firmware-Assisted TSO version 2")
Suggested-by: Derek Shute <***@stratus.com>
Signed-off-by: Edward Cree <***@solarflare.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ethernet/sfc/efx.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -522,6 +522,7 @@ efx_copy_channel(const struct efx_channe
if (tx_queue->channel)
tx_queue->channel = channel;
tx_queue->buffer = NULL;
+ tx_queue->cb_page = NULL;
memset(&tx_queue->txd, 0, sizeof(tx_queue->txd));
}
Greg Kroah-Hartman
2020-03-17 10:54:11 UTC
Permalink
From: Florian Fainelli <***@gmail.com>

commit 503ba7c6961034ff0047707685644cad9287c226 upstream.

It is currently possible for a PHY device to be suspended as part of a
network device driver's suspend call while it is still being attached to
that net_device, either via phy_suspend() or implicitly via phy_stop().

Later on, when the MDIO bus controller get suspended, we would attempt
to suspend again the PHY because it is still attached to a network
device.

This is both a waste of time and creates an opportunity for improper
clock/power management bugs to creep in.

Fixes: 803dd9c77ac3 ("net: phy: avoid suspending twice a PHY")
Signed-off-by: Florian Fainelli <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/net/phy/phy_device.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -91,7 +91,7 @@ static bool mdio_bus_phy_may_suspend(str
* MDIO bus driver and clock gated at this point.
*/
if (!netdev)
- return !phydev->suspended;
+ goto out;

if (netdev->wol_enabled)
return false;
@@ -111,7 +111,8 @@ static bool mdio_bus_phy_may_suspend(str
if (device_may_wakeup(&netdev->dev))
return false;

- return true;
+out:
+ return !phydev->suspended;
}

static int mdio_bus_phy_suspend(struct device *dev)
Greg Kroah-Hartman
2020-03-17 10:54:29 UTC
Permalink
From: Vasundhara Volam <vasundhara-***@broadcom.com>

[ Upstream commit a9b952d267e59a3b405e644930f46d252cea7122 ]

MTU changes may affect the number of IRQs so we must call
bnxt_close_nic()/bnxt_open_nic() with the irq_re_init parameter
set to true. The reason is that a larger MTU may require
aggregation rings not needed with smaller MTU. We may not be
able to allocate the required number of aggregation rings and
so we reduce the number of channels which will change the number
of IRQs. Without this patch, it may crash eventually in
pci_disable_msix() when the IRQs are not properly unwound.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <vasundhara-***@broadcom.com>
Signed-off-by: Michael Chan <***@broadcom.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8097,13 +8097,13 @@ static int bnxt_change_mtu(struct net_de
struct bnxt *bp = netdev_priv(dev);

if (netif_running(dev))
- bnxt_close_nic(bp, false, false);
+ bnxt_close_nic(bp, true, false);

dev->mtu = new_mtu;
bnxt_set_ring_params(bp);

if (netif_running(dev))
- return bnxt_open_nic(bp, false, false);
+ return bnxt_open_nic(bp, true, false);

return 0;
}
Greg Kroah-Hartman
2020-03-17 10:54:30 UTC
Permalink
From: Shakeel Butt <***@google.com>

[ Upstream commit e876ecc67db80dfdb8e237f71e5b43bb88ae549c ]

We are testing network memory accounting in our setup and noticed
inconsistent network memory usage and often unrelated cgroups network
usage correlates with testing workload. On further inspection, it
seems like mem_cgroup_sk_alloc() and cgroup_sk_alloc() are broken in
irq context specially for cgroup v1.

mem_cgroup_sk_alloc() and cgroup_sk_alloc() can be called in irq context
and kind of assumes that this can only happen from sk_clone_lock()
and the source sock object has already associated cgroup. However in
cgroup v1, where network memory accounting is opt-in, the source sock
can be unassociated with any cgroup and the new cloned sock can get
associated with unrelated interrupted cgroup.

Cgroup v2 can also suffer if the source sock object was created by
process in the root cgroup or if sk_alloc() is called in irq context.
The fix is to just do nothing in interrupt.

WARNING: Please note that about half of the TCP sockets are allocated
from the IRQ context, so, memory used by such sockets will not be
accouted by the memcg.

The stack trace of mem_cgroup_sk_alloc() from IRQ-context:

CPU: 70 PID: 12720 Comm: ssh Tainted: 5.6.0-smp-DEV #1
Hardware name: ...
Call Trace:
<IRQ>
dump_stack+0x57/0x75
mem_cgroup_sk_alloc+0xe9/0xf0
sk_clone_lock+0x2a7/0x420
inet_csk_clone_lock+0x1b/0x110
tcp_create_openreq_child+0x23/0x3b0
tcp_v6_syn_recv_sock+0x88/0x730
tcp_check_req+0x429/0x560
tcp_v6_rcv+0x72d/0xa40
ip6_protocol_deliver_rcu+0xc9/0x400
ip6_input+0x44/0xd0
? ip6_protocol_deliver_rcu+0x400/0x400
ip6_rcv_finish+0x71/0x80
ipv6_rcv+0x5b/0xe0
? ip6_sublist_rcv+0x2e0/0x2e0
process_backlog+0x108/0x1e0
net_rx_action+0x26b/0x460
__do_softirq+0x104/0x2a6
do_softirq_own_stack+0x2a/0x40
</IRQ>
do_softirq.part.19+0x40/0x50
__local_bh_enable_ip+0x51/0x60
ip6_finish_output2+0x23d/0x520
? ip6table_mangle_hook+0x55/0x160
__ip6_finish_output+0xa1/0x100
ip6_finish_output+0x30/0xd0
ip6_output+0x73/0x120
? __ip6_finish_output+0x100/0x100
ip6_xmit+0x2e3/0x600
? ipv6_anycast_cleanup+0x50/0x50
? inet6_csk_route_socket+0x136/0x1e0
? skb_free_head+0x1e/0x30
inet6_csk_xmit+0x95/0xf0
__tcp_transmit_skb+0x5b4/0xb20
__tcp_send_ack.part.60+0xa3/0x110
tcp_send_ack+0x1d/0x20
tcp_rcv_state_process+0xe64/0xe80
? tcp_v6_connect+0x5d1/0x5f0
tcp_v6_do_rcv+0x1b1/0x3f0
? tcp_v6_do_rcv+0x1b1/0x3f0
__release_sock+0x7f/0xd0
release_sock+0x30/0xa0
__inet_stream_connect+0x1c3/0x3b0
? prepare_to_wait+0xb0/0xb0
inet_stream_connect+0x3b/0x60
__sys_connect+0x101/0x120
? __sys_getsockopt+0x11b/0x140
__x64_sys_connect+0x1a/0x20
do_syscall_64+0x51/0x200
entry_SYSCALL_64_after_hwframe+0x44/0xa9

The stack trace of mem_cgroup_sk_alloc() from IRQ-context:
Fixes: 2d7580738345 ("mm: memcontrol: consolidate cgroup socket tracking")
Fixes: d979a39d7242 ("cgroup: duplicate cgroup reference when cloning sockets")
Signed-off-by: Shakeel Butt <***@google.com>
Reviewed-by: Roman Gushchin <***@fb.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
kernel/cgroup/cgroup.c | 4 ++++
mm/memcontrol.c | 4 ++++
2 files changed, 8 insertions(+)

--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5929,6 +5929,10 @@ void cgroup_sk_alloc(struct sock_cgroup_
return;
}

+ /* Don't associate the sock with unrelated interrupted task's cgroup. */
+ if (in_interrupt())
+ return;
+
rcu_read_lock();

while (true) {
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6321,6 +6321,10 @@ void mem_cgroup_sk_alloc(struct sock *sk
return;
}

+ /* Do not associate the sock with unrelated interrupted task's memcg. */
+ if (in_interrupt())
+ return;
+
rcu_read_lock();
memcg = mem_cgroup_from_task(current);
if (memcg == root_mem_cgroup)
Greg Kroah-Hartman
2020-03-17 10:54:31 UTC
Permalink
From: Shakeel Butt <***@google.com>

[ Upstream commit d752a4986532cb6305dfd5290a614cde8072769d ]

If a TCP socket is allocated in IRQ context or cloned from unassociated
(i.e. not associated to a memcg) in IRQ context then it will remain
unassociated for its whole life. Almost half of the TCPs created on the
system are created in IRQ context, so, memory used by such sockets will
not be accounted by the memcg.

This issue is more widespread in cgroup v1 where network memory
accounting is opt-in but it can happen in cgroup v2 if the source socket
for the cloning was created in root memcg.

To fix the issue, just do the association of the sockets at the accept()
time in the process context and then force charge the memory buffer
already used and reserved by the socket.

Signed-off-by: Shakeel Butt <***@google.com>
Reviewed-by: Eric Dumazet <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
mm/memcontrol.c | 14 --------------
net/core/sock.c | 5 ++++-
net/ipv4/inet_connection_sock.c | 20 ++++++++++++++++++++
3 files changed, 24 insertions(+), 15 deletions(-)

--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6307,20 +6307,6 @@ void mem_cgroup_sk_alloc(struct sock *sk
if (!mem_cgroup_sockets_enabled)
return;

- /*
- * Socket cloning can throw us here with sk_memcg already
- * filled. It won't however, necessarily happen from
- * process context. So the test for root memcg given
- * the current task's memcg won't help us in this case.
- *
- * Respecting the original socket's memcg is a better
- * decision in this case.
- */
- if (sk->sk_memcg) {
- css_get(&sk->sk_memcg->css);
- return;
- }
-
/* Do not associate the sock with unrelated interrupted task's memcg. */
if (in_interrupt())
return;
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1689,7 +1689,10 @@ struct sock *sk_clone_lock(const struct
atomic_set(&newsk->sk_zckey, 0);

sock_reset_flag(newsk, SOCK_DONE);
- mem_cgroup_sk_alloc(newsk);
+
+ /* sk->sk_memcg will be populated at accept() time */
+ newsk->sk_memcg = NULL;
+
cgroup_sk_alloc(&newsk->sk_cgrp_data);

rcu_read_lock();
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -479,6 +479,26 @@ struct sock *inet_csk_accept(struct sock
}
spin_unlock_bh(&queue->fastopenq.lock);
}
+
+ if (mem_cgroup_sockets_enabled) {
+ int amt;
+
+ /* atomically get the memory usage, set and charge the
+ * sk->sk_memcg.
+ */
+ lock_sock(newsk);
+
+ /* The sk has not been accepted yet, no need to look at
+ * sk->sk_wmem_queued.
+ */
+ amt = sk_mem_pages(newsk->sk_forward_alloc +
+ atomic_read(&sk->sk_rmem_alloc));
+ mem_cgroup_sk_alloc(newsk);
+ if (newsk->sk_memcg && amt)
+ mem_cgroup_charge_skmem(newsk->sk_memcg, amt);
+
+ release_sock(newsk);
+ }
out:
release_sock(sk);
if (req)
Greg Kroah-Hartman
2020-03-17 10:54:32 UTC
Permalink
From: Eric Dumazet <***@google.com>

commit 06669ea346e476a5339033d77ef175566a40efbb upstream.

Locking newsk while still holding the listener lock triggered
a lockdep splat [1]

We can simply move the memcg code after we release the listener lock,
as this can also help if multiple threads are sharing a common listener.

Also fix a typo while reading socket sk_rmem_alloc.

[1]
WARNING: possible recursive locking detected
5.6.0-rc3-syzkaller #0 Not tainted
--------------------------------------------
syz-executor598/9524 is trying to acquire lock:
ffff88808b5b8b90 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1541 [inline]
ffff88808b5b8b90 (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0x69f/0xd30 net/ipv4/inet_connection_sock.c:492

but task is already holding lock:
ffff88808b5b9590 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1541 [inline]
ffff88808b5b9590 (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0x8d/0xd30 net/ipv4/inet_connection_sock.c:445

other info that might help us debug this:
Possible unsafe locking scenario:

CPU0
----
lock(sk_lock-AF_INET6);
lock(sk_lock-AF_INET6);

*** DEADLOCK ***

May be due to missing lock nesting notation

1 lock held by syz-executor598/9524:
#0: ffff88808b5b9590 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1541 [inline]
#0: ffff88808b5b9590 (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0x8d/0xd30 net/ipv4/inet_connection_sock.c:445

stack backtrace:
CPU: 0 PID: 9524 Comm: syz-executor598 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
print_deadlock_bug kernel/locking/lockdep.c:2370 [inline]
check_deadlock kernel/locking/lockdep.c:2411 [inline]
validate_chain kernel/locking/lockdep.c:2954 [inline]
__lock_acquire.cold+0x114/0x288 kernel/locking/lockdep.c:3954
lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
lock_sock_nested+0xc5/0x110 net/core/sock.c:2947
lock_sock include/net/sock.h:1541 [inline]
inet_csk_accept+0x69f/0xd30 net/ipv4/inet_connection_sock.c:492
inet_accept+0xe9/0x7c0 net/ipv4/af_inet.c:734
__sys_accept4_file+0x3ac/0x5b0 net/socket.c:1758
__sys_accept4+0x53/0x90 net/socket.c:1809
__do_sys_accept4 net/socket.c:1821 [inline]
__se_sys_accept4 net/socket.c:1818 [inline]
__x64_sys_accept4+0x93/0xf0 net/socket.c:1818
do_syscall_64+0xf6/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4445c9
Code: e8 0c 0d 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc35b37608 EFLAGS: 00000246 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004445c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000306777 R09: 0000000000306777
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000004053d0 R14: 0000000000000000 R15: 0000000000000000

Fixes: d752a4986532 ("net: memcg: late association of sock to memcg")
Signed-off-by: Eric Dumazet <***@google.com>
Cc: Shakeel Butt <***@google.com>
Reported-by: syzbot <***@googlegroups.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv4/inet_connection_sock.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -480,27 +480,27 @@ struct sock *inet_csk_accept(struct sock
spin_unlock_bh(&queue->fastopenq.lock);
}

- if (mem_cgroup_sockets_enabled) {
+out:
+ release_sock(sk);
+ if (newsk && mem_cgroup_sockets_enabled) {
int amt;

/* atomically get the memory usage, set and charge the
- * sk->sk_memcg.
+ * newsk->sk_memcg.
*/
lock_sock(newsk);

- /* The sk has not been accepted yet, no need to look at
- * sk->sk_wmem_queued.
+ /* The socket has not been accepted yet, no need to look at
+ * newsk->sk_wmem_queued.
*/
amt = sk_mem_pages(newsk->sk_forward_alloc +
- atomic_read(&sk->sk_rmem_alloc));
+ atomic_read(&newsk->sk_rmem_alloc));
mem_cgroup_sk_alloc(newsk);
if (newsk->sk_memcg && amt)
mem_cgroup_charge_skmem(newsk->sk_memcg, amt);

release_sock(newsk);
}
-out:
- release_sock(sk);
if (req)
reqsk_put(req);
return newsk;
Greg Kroah-Hartman
2020-03-17 10:54:33 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 8750939b6ad86abc3f53ec8a9683a1cded4a5654 ]

DEVLINK_ATTR_PARAM_VALUE_DATA may have different types
so it's not checked by the normal netlink policy. Make
sure the attribute length is what we expect.

Fixes: e3b7ca18ad7b ("devlink: Add param set command")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Reviewed-by: Jiri Pirko <***@mellanox.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/core/devlink.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)

--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2995,34 +2995,41 @@ devlink_param_value_get_from_info(const
struct genl_info *info,
union devlink_param_value *value)
{
+ struct nlattr *param_data;
int len;

- if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
- !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
+ param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
+
+ if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
return -EINVAL;

switch (param->type) {
case DEVLINK_PARAM_TYPE_U8:
- value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
+ if (nla_len(param_data) != sizeof(u8))
+ return -EINVAL;
+ value->vu8 = nla_get_u8(param_data);
break;
case DEVLINK_PARAM_TYPE_U16:
- value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
+ if (nla_len(param_data) != sizeof(u16))
+ return -EINVAL;
+ value->vu16 = nla_get_u16(param_data);
break;
case DEVLINK_PARAM_TYPE_U32:
- value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
+ if (nla_len(param_data) != sizeof(u32))
+ return -EINVAL;
+ value->vu32 = nla_get_u32(param_data);
break;
case DEVLINK_PARAM_TYPE_STRING:
- len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
- nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
- if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
+ len = strnlen(nla_data(param_data), nla_len(param_data));
+ if (len == nla_len(param_data) ||
len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
return -EINVAL;
- strcpy(value->vstr,
- nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
+ strcpy(value->vstr, nla_data(param_data));
break;
case DEVLINK_PARAM_TYPE_BOOL:
- value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
- true : false;
+ if (param_data && nla_len(param_data))
+ return -EINVAL;
+ value->vbool = nla_get_flag(param_data);
break;
}
return 0;
Greg Kroah-Hartman
2020-03-17 10:54:34 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 4c16d64ea04056f1b1b324ab6916019f6a064114 ]

Add missing netlink policy entry for FRA_TUN_ID.

Fixes: e7030878fc84 ("fib: Add fib rule match on tunnel id")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Reviewed-by: David Ahern <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
include/net/fib_rules.h | 1 +
1 file changed, 1 insertion(+)

--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -107,6 +107,7 @@ struct fib_rule_notifier_info {
[FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
[FRA_PRIORITY] = { .type = NLA_U32 }, \
[FRA_FWMARK] = { .type = NLA_U32 }, \
+ [FRA_TUN_ID] = { .type = NLA_U64 }, \
[FRA_FWMASK] = { .type = NLA_U32 }, \
[FRA_TABLE] = { .type = NLA_U32 }, \
[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
Greg Kroah-Hartman
2020-03-17 10:54:36 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit b60673c4c418bef7550d02faf53c34fbfeb366bf ]

Add missing attribute type validation for IEEE802154_ATTR_DEV_TYPE
to the netlink policy.

Fixes: 90c049b2c6ae ("ieee802154: interface type to be added")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Acked-by: Stefan Schmidt <***@datenfreihafen.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ieee802154/nl_policy.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/ieee802154/nl_policy.c
+++ b/net/ieee802154/nl_policy.c
@@ -36,6 +36,7 @@ const struct nla_policy ieee802154_polic
[IEEE802154_ATTR_BAT_EXT] = { .type = NLA_U8, },
[IEEE802154_ATTR_COORD_REALIGN] = { .type = NLA_U8, },
[IEEE802154_ATTR_PAGE] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_DEV_TYPE] = { .type = NLA_U8, },
[IEEE802154_ATTR_COORD_SHORT_ADDR] = { .type = NLA_U16, },
[IEEE802154_ATTR_COORD_HW_ADDR] = { .type = NLA_HW_ADDR, },
[IEEE802154_ATTR_COORD_PAN_ID] = { .type = NLA_U16, },
Greg Kroah-Hartman
2020-03-17 10:54:35 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 9322cd7c4af2ccc7fe7c5f01adb53f4f77949e92 ]

Add missing attribute validation for several u8 types.

Fixes: 2c21d11518b6 ("net: add NL802154 interface for configuration of 802.15.4 devices")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Acked-by: Stefan Schmidt <***@datenfreihafen.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ieee802154/nl_policy.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/net/ieee802154/nl_policy.c
+++ b/net/ieee802154/nl_policy.c
@@ -30,6 +30,11 @@ const struct nla_policy ieee802154_polic
[IEEE802154_ATTR_HW_ADDR] = { .type = NLA_HW_ADDR, },
[IEEE802154_ATTR_PAN_ID] = { .type = NLA_U16, },
[IEEE802154_ATTR_CHANNEL] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_BCN_ORD] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_SF_ORD] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_PAN_COORD] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_BAT_EXT] = { .type = NLA_U8, },
+ [IEEE802154_ATTR_COORD_REALIGN] = { .type = NLA_U8, },
[IEEE802154_ATTR_PAGE] = { .type = NLA_U8, },
[IEEE802154_ATTR_COORD_SHORT_ADDR] = { .type = NLA_U16, },
[IEEE802154_ATTR_COORD_HW_ADDR] = { .type = NLA_HW_ADDR, },
Greg Kroah-Hartman
2020-03-17 10:54:14 UTC
Permalink
From: Dmitry Yakunin <***@yandex-team.ru>

[ Upstream commit 83f73c5bb7b9a9135173f0ba2b1aa00c06664ff9 ]

In commit 1ec17dbd90f8 ("inet_diag: fix reporting cgroup classid and
fallback to priority") croup classid reporting was fixed. But this works
only for TCP sockets because for other socket types icsk parameter can
be NULL and classid code path is skipped. This change moves classid
handling to inet_diag_msg_attrs_fill() function.

Also inet_diag_msg_attrs_size() helper was added and addends in
nlmsg_new() were reordered to save order from inet_sk_diag_fill().

Fixes: 1ec17dbd90f8 ("inet_diag: fix reporting cgroup classid and fallback to priority")
Signed-off-by: Dmitry Yakunin <***@yandex-team.ru>
Reviewed-by: Konstantin Khlebnikov <***@yandex-team.ru>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
include/linux/inet_diag.h | 18 ++++++++++++------
net/ipv4/inet_diag.c | 44 ++++++++++++++++++++------------------------
net/ipv4/raw_diag.c | 5 +++--
net/ipv4/udp_diag.c | 5 +++--
net/sctp/diag.c | 8 ++------
5 files changed, 40 insertions(+), 40 deletions(-)

--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -2,15 +2,10 @@
#ifndef _INET_DIAG_H_
#define _INET_DIAG_H_ 1

+#include <net/netlink.h>
#include <uapi/linux/inet_diag.h>

-struct net;
-struct sock;
struct inet_hashinfo;
-struct nlattr;
-struct nlmsghdr;
-struct sk_buff;
-struct netlink_callback;

struct inet_diag_handler {
void (*dump)(struct sk_buff *skb,
@@ -62,6 +57,17 @@ int inet_diag_bc_sk(const struct nlattr

void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk);

+static inline size_t inet_diag_msg_attrs_size(void)
+{
+ return nla_total_size(1) /* INET_DIAG_SHUTDOWN */
+ + nla_total_size(1) /* INET_DIAG_TOS */
+#if IS_ENABLED(CONFIG_IPV6)
+ + nla_total_size(1) /* INET_DIAG_TCLASS */
+ + nla_total_size(1) /* INET_DIAG_SKV6ONLY */
+#endif
+ + nla_total_size(4) /* INET_DIAG_MARK */
+ + nla_total_size(4); /* INET_DIAG_CLASS_ID */
+}
int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
struct inet_diag_msg *r, int ext,
struct user_namespace *user_ns, bool net_admin);
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -104,13 +104,9 @@ static size_t inet_sk_attr_size(struct s
aux = handler->idiag_get_aux_size(sk, net_admin);

return nla_total_size(sizeof(struct tcp_info))
- + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
- + nla_total_size(1) /* INET_DIAG_TOS */
- + nla_total_size(1) /* INET_DIAG_TCLASS */
- + nla_total_size(4) /* INET_DIAG_MARK */
- + nla_total_size(4) /* INET_DIAG_CLASS_ID */
- + nla_total_size(sizeof(struct inet_diag_meminfo))
+ nla_total_size(sizeof(struct inet_diag_msg))
+ + inet_diag_msg_attrs_size()
+ + nla_total_size(sizeof(struct inet_diag_meminfo))
+ nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
+ nla_total_size(TCP_CA_NAME_MAX)
+ nla_total_size(sizeof(struct tcpvegas_info))
@@ -151,6 +147,24 @@ int inet_diag_msg_attrs_fill(struct sock
if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark))
goto errout;

+ if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) ||
+ ext & (1 << (INET_DIAG_TCLASS - 1))) {
+ u32 classid = 0;
+
+#ifdef CONFIG_SOCK_CGROUP_DATA
+ classid = sock_cgroup_classid(&sk->sk_cgrp_data);
+#endif
+ /* Fallback to socket priority if class id isn't set.
+ * Classful qdiscs use it as direct reference to class.
+ * For cgroup2 classid is always zero.
+ */
+ if (!classid)
+ classid = sk->sk_priority;
+
+ if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid))
+ goto errout;
+ }
+
r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
r->idiag_inode = sock_i_ino(sk);

@@ -288,24 +302,6 @@ int inet_sk_diag_fill(struct sock *sk, s
goto errout;
}

- if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) ||
- ext & (1 << (INET_DIAG_TCLASS - 1))) {
- u32 classid = 0;
-
-#ifdef CONFIG_SOCK_CGROUP_DATA
- classid = sock_cgroup_classid(&sk->sk_cgrp_data);
-#endif
- /* Fallback to socket priority if class id isn't set.
- * Classful qdiscs use it as direct reference to class.
- * For cgroup2 classid is always zero.
- */
- if (!classid)
- classid = sk->sk_priority;
-
- if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid))
- goto errout;
- }
-
out:
nlmsg_end(skb, nlh);
return 0;
--- a/net/ipv4/raw_diag.c
+++ b/net/ipv4/raw_diag.c
@@ -99,8 +99,9 @@ static int raw_diag_dump_one(struct sk_b
if (IS_ERR(sk))
return PTR_ERR(sk);

- rep = nlmsg_new(sizeof(struct inet_diag_msg) +
- sizeof(struct inet_diag_meminfo) + 64,
+ rep = nlmsg_new(nla_total_size(sizeof(struct inet_diag_msg)) +
+ inet_diag_msg_attrs_size() +
+ nla_total_size(sizeof(struct inet_diag_meminfo)) + 64,
GFP_KERNEL);
if (!rep) {
sock_put(sk);
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -67,8 +67,9 @@ static int udp_dump_one(struct udp_table
goto out;

err = -ENOMEM;
- rep = nlmsg_new(sizeof(struct inet_diag_msg) +
- sizeof(struct inet_diag_meminfo) + 64,
+ rep = nlmsg_new(nla_total_size(sizeof(struct inet_diag_msg)) +
+ inet_diag_msg_attrs_size() +
+ nla_total_size(sizeof(struct inet_diag_meminfo)) + 64,
GFP_KERNEL);
if (!rep)
goto out;
--- a/net/sctp/diag.c
+++ b/net/sctp/diag.c
@@ -252,15 +252,11 @@ static size_t inet_assoc_attr_size(struc
addrcnt++;

return nla_total_size(sizeof(struct sctp_info))
- + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
- + nla_total_size(1) /* INET_DIAG_TOS */
- + nla_total_size(1) /* INET_DIAG_TCLASS */
- + nla_total_size(4) /* INET_DIAG_MARK */
- + nla_total_size(4) /* INET_DIAG_CLASS_ID */
+ nla_total_size(addrlen * asoc->peer.transport_count)
+ nla_total_size(addrlen * addrcnt)
- + nla_total_size(sizeof(struct inet_diag_meminfo))
+ nla_total_size(sizeof(struct inet_diag_msg))
+ + inet_diag_msg_attrs_size()
+ + nla_total_size(sizeof(struct inet_diag_meminfo))
+ 64;
}
Greg Kroah-Hartman
2020-03-17 10:54:15 UTC
Permalink
From: Hangbin Liu <***@gmail.com>

[ Upstream commit 60380488e4e0b95e9e82aa68aa9705baa86de84c ]

Rafał found an issue that for non-Ethernet interface, if we down and up
frequently, the memory will be consumed slowly.

The reason is we add allnodes/allrouters addressed in multicast list in
ipv6_add_dev(). When link down, we call ipv6_mc_down(), store all multicast
addresses via mld_add_delrec(). But when link up, we don't call ipv6_mc_up()
for non-Ethernet interface to remove the addresses. This makes idev->mc_tomb
getting bigger and bigger. The call stack looks like:

addrconf_notify(NETDEV_REGISTER)
ipv6_add_dev
ipv6_dev_mc_inc(ff01::1)
ipv6_dev_mc_inc(ff02::1)
ipv6_dev_mc_inc(ff02::2)

addrconf_notify(NETDEV_UP)
addrconf_dev_config
/* Alas, we support only Ethernet autoconfiguration. */
return;

addrconf_notify(NETDEV_DOWN)
addrconf_ifdown
ipv6_mc_down
igmp6_group_dropped(ff02::2)
mld_add_delrec(ff02::2)
igmp6_group_dropped(ff02::1)
igmp6_group_dropped(ff01::1)

After investigating, I can't found a rule to disable multicast on
non-Ethernet interface. In RFC2460, the link could be Ethernet, PPP, ATM,
tunnels, etc. In IPv4, it doesn't check the dev type when calls ip_mc_up()
in inetdev_event(). Even for IPv6, we don't check the dev type and call
ipv6_add_dev(), ipv6_dev_mc_inc() after register device.

So I think it's OK to fix this memory consumer by calling ipv6_mc_up() for
non-Ethernet interface.

v2: Also check IFF_MULTICAST flag to make sure the interface supports
multicast

Reported-by: Rafał Miłecki <***@gmail.com>
Tested-by: Rafał Miłecki <***@gmail.com>
Fixes: 74235a25c673 ("[IPV6] addrconf: Fix IPv6 on tuntap tunnels")
Fixes: 1666d49e1d41 ("mld: do not remove mld souce list info when set link down")
Signed-off-by: Hangbin Liu <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv6/addrconf.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3291,6 +3291,10 @@ static void addrconf_dev_config(struct n
(dev->type != ARPHRD_NONE) &&
(dev->type != ARPHRD_RAWIP)) {
/* Alas, we support only Ethernet autoconfiguration. */
+ idev = __in6_dev_get(dev);
+ if (!IS_ERR_OR_NULL(idev) && dev->flags & IFF_UP &&
+ dev->flags & IFF_MULTICAST)
+ ipv6_mc_up(idev);
return;
}
Greg Kroah-Hartman
2020-03-17 10:54:13 UTC
Permalink
From: Eric Dumazet <***@google.com>

[ Upstream commit 17c25cafd4d3e74c83dce56b158843b19c40b414 ]

syzbot found an interesting case of the kernel reading
an uninit-value [1]

Problem is in the handling of ETH_P_WCCP in gre_parse_header()

We look at the byte following GRE options to eventually decide
if the options are four bytes longer.

Use skb_header_pointer() to not pull bytes if we found
that no more bytes were needed.

All callers of gre_parse_header() are properly using pskb_may_pull()
anyway before proceeding to next header.

[1]
BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2303 [inline]
BUG: KMSAN: uninit-value in __iptunnel_pull_header+0x30c/0xbd0 net/ipv4/ip_tunnel_core.c:94
CPU: 1 PID: 11784 Comm: syz-executor940 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
pskb_may_pull include/linux/skbuff.h:2303 [inline]
__iptunnel_pull_header+0x30c/0xbd0 net/ipv4/ip_tunnel_core.c:94
iptunnel_pull_header include/net/ip_tunnels.h:411 [inline]
gre_rcv+0x15e/0x19c0 net/ipv6/ip6_gre.c:606
ip6_protocol_deliver_rcu+0x181b/0x22c0 net/ipv6/ip6_input.c:432
ip6_input_finish net/ipv6/ip6_input.c:473 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
ip6_input net/ipv6/ip6_input.c:482 [inline]
ip6_mc_input+0xdf2/0x1460 net/ipv6/ip6_input.c:576
dst_input include/net/dst.h:442 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
ipv6_rcv+0x683/0x710 net/ipv6/ip6_input.c:306
__netif_receive_skb_one_core net/core/dev.c:5198 [inline]
__netif_receive_skb net/core/dev.c:5312 [inline]
netif_receive_skb_internal net/core/dev.c:5402 [inline]
netif_receive_skb+0x66b/0xf20 net/core/dev.c:5461
tun_rx_batched include/linux/skbuff.h:4321 [inline]
tun_get_user+0x6aef/0x6f60 drivers/net/tun.c:1997
tun_chr_write_iter+0x1f2/0x360 drivers/net/tun.c:2026
call_write_iter include/linux/fs.h:1901 [inline]
new_sync_write fs/read_write.c:483 [inline]
__vfs_write+0xa5a/0xca0 fs/read_write.c:496
vfs_write+0x44a/0x8f0 fs/read_write.c:558
ksys_write+0x267/0x450 fs/read_write.c:611
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__ia32_sys_write+0xdb/0x120 fs/read_write.c:620
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f62d99
Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000fffedb2c EFLAGS: 00000217 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020002580
RDX: 0000000000000fca RSI: 0000000000000036 RDI: 0000000000000004
RBP: 0000000000008914 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
alloc_skb_with_frags+0x18c/0xa70 net/core/skbuff.c:5766
sock_alloc_send_pskb+0xada/0xc60 net/core/sock.c:2242
tun_alloc_skb drivers/net/tun.c:1529 [inline]
tun_get_user+0x10ae/0x6f60 drivers/net/tun.c:1843
tun_chr_write_iter+0x1f2/0x360 drivers/net/tun.c:2026
call_write_iter include/linux/fs.h:1901 [inline]
new_sync_write fs/read_write.c:483 [inline]
__vfs_write+0xa5a/0xca0 fs/read_write.c:496
vfs_write+0x44a/0x8f0 fs/read_write.c:558
ksys_write+0x267/0x450 fs/read_write.c:611
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__ia32_sys_write+0xdb/0x120 fs/read_write.c:620
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139

Fixes: 95f5c64c3c13 ("gre: Move utility functions to common headers")
Fixes: c54419321455 ("GRE: Refactor GRE tunneling code.")
Signed-off-by: Eric Dumazet <***@google.com>
Reported-by: syzbot <***@googlegroups.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv4/gre_demux.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -61,7 +61,9 @@ int gre_del_protocol(const struct gre_pr
}
EXPORT_SYMBOL_GPL(gre_del_protocol);

-/* Fills in tpi and returns header length to be pulled. */
+/* Fills in tpi and returns header length to be pulled.
+ * Note that caller must use pskb_may_pull() before pulling GRE header.
+ */
int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
bool *csum_err, __be16 proto, int nhs)
{
@@ -115,8 +117,14 @@ int gre_parse_header(struct sk_buff *skb
* - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
*/
if (greh->flags == 0 && tpi->proto == htons(ETH_P_WCCP)) {
+ u8 _val, *val;
+
+ val = skb_header_pointer(skb, nhs + hdr_len,
+ sizeof(_val), &_val);
+ if (!val)
+ return -EINVAL;
tpi->proto = proto;
- if ((*(u8 *)options & 0xF0) != 0x40)
+ if ((*val & 0xF0) != 0x40)
hdr_len += 4;
}
tpi->hdr_len = hdr_len;
Greg Kroah-Hartman
2020-03-17 10:54:16 UTC
Permalink
From: Mahesh Bandewar <***@google.com>

[ Upstream commit e18b353f102e371580f3f01dd47567a25acc3c1d ]

If there are substantial number of slaves created as simulated by
Syzbot, the backlog processing could take much longer and result
into the issue found in the Syzbot report.

INFO: rcu_sched detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=5049, c=5048, q=752)
All QSes seen, last rcu_sched kthread activity 10502 (4294965563-4294955061), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.1 R running task on cpu 1 10984 11210 3866 0x30020008 179034491270
Call Trace:
<IRQ>
[<ffffffff81497163>] _sched_show_task kernel/sched/core.c:8063 [inline]
[<ffffffff81497163>] _sched_show_task.cold+0x2fd/0x392 kernel/sched/core.c:8030
[<ffffffff8146a91b>] sched_show_task+0xb/0x10 kernel/sched/core.c:8073
[<ffffffff815c931b>] print_other_cpu_stall kernel/rcu/tree.c:1577 [inline]
[<ffffffff815c931b>] check_cpu_stall kernel/rcu/tree.c:1695 [inline]
[<ffffffff815c931b>] __rcu_pending kernel/rcu/tree.c:3478 [inline]
[<ffffffff815c931b>] rcu_pending kernel/rcu/tree.c:3540 [inline]
[<ffffffff815c931b>] rcu_check_callbacks.cold+0xbb4/0xc29 kernel/rcu/tree.c:2876
[<ffffffff815e3962>] update_process_times+0x32/0x80 kernel/time/timer.c:1635
[<ffffffff816164f0>] tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:161
[<ffffffff81616ae4>] tick_sched_timer+0x44/0x130 kernel/time/tick-sched.c:1193
[<ffffffff815e75f7>] __run_hrtimer kernel/time/hrtimer.c:1393 [inline]
[<ffffffff815e75f7>] __hrtimer_run_queues+0x307/0xd90 kernel/time/hrtimer.c:1455
[<ffffffff815e90ea>] hrtimer_interrupt+0x2ea/0x730 kernel/time/hrtimer.c:1513
[<ffffffff844050f4>] local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1031 [inline]
[<ffffffff844050f4>] smp_apic_timer_interrupt+0x144/0x5e0 arch/x86/kernel/apic/apic.c:1056
[<ffffffff84401cbe>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:778
RIP: 0010:do_raw_read_lock+0x22/0x80 kernel/locking/spinlock_debug.c:153
RSP: 0018:ffff8801dad07ab8 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff12
RAX: 0000000000000000 RBX: ffff8801c4135680 RCX: 0000000000000000
RDX: 1ffff10038826afe RSI: ffff88019d816bb8 RDI: ffff8801c41357f0
RBP: ffff8801dad07ac0 R08: 0000000000004b15 R09: 0000000000310273
R10: ffff88019d816bb8 R11: 0000000000000001 R12: ffff8801c41357e8
R13: 0000000000000000 R14: ffff8801cfb19850 R15: ffff8801cfb198b0
[<ffffffff8101460e>] __raw_read_lock_bh include/linux/rwlock_api_smp.h:177 [inline]
[<ffffffff8101460e>] _raw_read_lock_bh+0x3e/0x50 kernel/locking/spinlock.c:240
[<ffffffff840d78ca>] ipv6_chk_mcast_addr+0x11a/0x6f0 net/ipv6/mcast.c:1006
[<ffffffff84023439>] ip6_mc_input+0x319/0x8e0 net/ipv6/ip6_input.c:482
[<ffffffff840211c8>] dst_input include/net/dst.h:449 [inline]
[<ffffffff840211c8>] ip6_rcv_finish+0x408/0x610 net/ipv6/ip6_input.c:78
[<ffffffff840214de>] NF_HOOK include/linux/netfilter.h:292 [inline]
[<ffffffff840214de>] NF_HOOK include/linux/netfilter.h:286 [inline]
[<ffffffff840214de>] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:278
[<ffffffff83a29efa>] __netif_receive_skb_one_core+0x12a/0x1f0 net/core/dev.c:5303
[<ffffffff83a2a15c>] __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:5417
[<ffffffff83a2f536>] process_backlog+0x216/0x6c0 net/core/dev.c:6243
[<ffffffff83a30d1b>] napi_poll net/core/dev.c:6680 [inline]
[<ffffffff83a30d1b>] net_rx_action+0x47b/0xfb0 net/core/dev.c:6748
[<ffffffff846002c8>] __do_softirq+0x2c8/0x99a kernel/softirq.c:317
[<ffffffff813e656a>] invoke_softirq kernel/softirq.c:399 [inline]
[<ffffffff813e656a>] irq_exit+0x16a/0x1a0 kernel/softirq.c:439
[<ffffffff84405115>] exiting_irq arch/x86/include/asm/apic.h:561 [inline]
[<ffffffff84405115>] smp_apic_timer_interrupt+0x165/0x5e0 arch/x86/kernel/apic/apic.c:1058
[<ffffffff84401cbe>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:778
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:102
RSP: 0018:ffff880196033bd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12
RAX: ffff88019d8161c0 RBX: 00000000ffffffff RCX: ffffc90003501000
RDX: 0000000000000002 RSI: ffffffff816236d1 RDI: 0000000000000005
RBP: ffff880196033bd8 R08: ffff88019d8161c0 R09: 0000000000000000
R10: 1ffff10032c067f0 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000080 R14: 0000000000000000 R15: 0000000000000000
[<ffffffff816236d1>] do_futex+0x151/0x1d50 kernel/futex.c:3548
[<ffffffff816260f0>] C_SYSC_futex kernel/futex_compat.c:201 [inline]
[<ffffffff816260f0>] compat_SyS_futex+0x270/0x3b0 kernel/futex_compat.c:175
[<ffffffff8101da17>] do_syscall_32_irqs_on arch/x86/entry/common.c:353 [inline]
[<ffffffff8101da17>] do_fast_syscall_32+0x357/0xe1c arch/x86/entry/common.c:415
[<ffffffff84401a9b>] entry_SYSENTER_compat+0x8b/0x9d arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f23c69
RSP: 002b:00000000f5d1f12c EFLAGS: 00000282 ORIG_RAX: 00000000000000f0
RAX: ffffffffffffffda RBX: 000000000816af88 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000816af8c
RBP: 00000000f5d1f228 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_sched kthread starved for 10502 jiffies! g5049 c5048 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched R running task on cpu 1 13048 8 2 0x90000000 179099587640
Call Trace:
[<ffffffff8147321f>] context_switch+0x60f/0xa60 kernel/sched/core.c:3209
[<ffffffff8100095a>] __schedule+0x5aa/0x1da0 kernel/sched/core.c:3934
[<ffffffff810021df>] schedule+0x8f/0x1b0 kernel/sched/core.c:4011
[<ffffffff8101116d>] schedule_timeout+0x50d/0xee0 kernel/time/timer.c:1803
[<ffffffff815c13f1>] rcu_gp_kthread+0xda1/0x3b50 kernel/rcu/tree.c:2327
[<ffffffff8144b318>] kthread+0x348/0x420 kernel/kthread.c:246
[<ffffffff84400266>] ret_from_fork+0x56/0x70 arch/x86/entry/entry_64.S:393

Fixes: ba35f8588f47 (“ipvlan: Defer multicast / broadcast processing to a work-queue”)
Signed-off-by: Mahesh Bandewar <***@google.com>
Reported-by: syzbot <***@googlegroups.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ipvlan/ipvlan_core.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -282,6 +282,7 @@ void ipvlan_process_multicast(struct wor
}
ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true);
local_bh_enable();
+ cond_resched_rcu();
}
rcu_read_unlock();
Greg Kroah-Hartman
2020-03-17 10:54:12 UTC
Permalink
From: Dmitry Yakunin <***@yandex-team.ru>

[ Upstream commit 018d26fcd12a75fb9b5fe233762aa3f2f0854b88 ]

In our production environment we have faced with problem that updating
classid in cgroup with heavy tasks cause long freeze of the file tables
in this tasks. By heavy tasks we understand tasks with many threads and
opened sockets (e.g. balancers). This freeze leads to an increase number
of client timeouts.

This patch implements following logic to fix this issue:
аfter iterating 1000 file descriptors file table lock will be released
thus providing a time gap for socket creation/deletion.

Now update is non atomic and socket may be skipped using calls:

dup2(oldfd, newfd);
close(oldfd);

But this case is not typical. Moreover before this patch skip is possible
too by hiding socket fd in unix socket buffer.

New sockets will be allocated with updated classid because cgroup state
is updated before start of the file descriptors iteration.

So in common cases this patch has no side effects.

Signed-off-by: Dmitry Yakunin <***@yandex-team.ru>
Reviewed-by: Konstantin Khlebnikov <***@yandex-team.ru>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/core/netclassid_cgroup.c | 47 +++++++++++++++++++++++++++++++++----------
1 file changed, 37 insertions(+), 10 deletions(-)

--- a/net/core/netclassid_cgroup.c
+++ b/net/core/netclassid_cgroup.c
@@ -57,30 +57,60 @@ static void cgrp_css_free(struct cgroup_
kfree(css_cls_state(css));
}

+/*
+ * To avoid freezing of sockets creation for tasks with big number of threads
+ * and opened sockets lets release file_lock every 1000 iterated descriptors.
+ * New sockets will already have been created with new classid.
+ */
+
+struct update_classid_context {
+ u32 classid;
+ unsigned int batch;
+};
+
+#define UPDATE_CLASSID_BATCH 1000
+
static int update_classid_sock(const void *v, struct file *file, unsigned n)
{
int err;
+ struct update_classid_context *ctx = (void *)v;
struct socket *sock = sock_from_file(file, &err);

if (sock) {
spin_lock(&cgroup_sk_update_lock);
- sock_cgroup_set_classid(&sock->sk->sk_cgrp_data,
- (unsigned long)v);
+ sock_cgroup_set_classid(&sock->sk->sk_cgrp_data, ctx->classid);
spin_unlock(&cgroup_sk_update_lock);
}
+ if (--ctx->batch == 0) {
+ ctx->batch = UPDATE_CLASSID_BATCH;
+ return n + 1;
+ }
return 0;
}

+static void update_classid_task(struct task_struct *p, u32 classid)
+{
+ struct update_classid_context ctx = {
+ .classid = classid,
+ .batch = UPDATE_CLASSID_BATCH
+ };
+ unsigned int fd = 0;
+
+ do {
+ task_lock(p);
+ fd = iterate_fd(p->files, fd, update_classid_sock, &ctx);
+ task_unlock(p);
+ cond_resched();
+ } while (fd);
+}
+
static void cgrp_attach(struct cgroup_taskset *tset)
{
struct cgroup_subsys_state *css;
struct task_struct *p;

cgroup_taskset_for_each(p, css, tset) {
- task_lock(p);
- iterate_fd(p->files, 0, update_classid_sock,
- (void *)(unsigned long)css_cls_state(css)->classid);
- task_unlock(p);
+ update_classid_task(p, css_cls_state(css)->classid);
}
}

@@ -102,10 +132,7 @@ static int write_classid(struct cgroup_s

css_task_iter_start(css, 0, &it);
while ((p = css_task_iter_next(&it))) {
- task_lock(p);
- iterate_fd(p->files, 0, update_classid_sock,
- (void *)(unsigned long)cs->classid);
- task_unlock(p);
+ update_classid_task(p, cs->classid);
cond_resched();
}
css_task_iter_end(&it);
Greg Kroah-Hartman
2020-03-17 10:54:38 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 31d9a1c524964bac77b7f9d0a1ac140dc6b57461 ]

Add missing attribute validation for IFLA_MACSEC_PORT
to the netlink policy.

Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/macsec.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2995,6 +2995,7 @@ static const struct device_type macsec_t

static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
[IFLA_MACSEC_SCI] = { .type = NLA_U64 },
+ [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
[IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
[IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
[IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
Greg Kroah-Hartman
2020-03-17 10:54:47 UTC
Permalink
From: Hangbin Liu <***@gmail.com>

[ Upstream commit 617940123e0140521f3080d2befc2bf55bcda094 ]

When we modify the route metric, the peer address's route need also
be updated. Before the fix:

+ ip addr add dev dummy1 2001:db8::1 peer 2001:db8::2 metric 60
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 60 pref medium
2001:db8::2 proto kernel metric 60 pref medium
+ ip addr change dev dummy1 2001:db8::1 peer 2001:db8::2 metric 61
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 61 pref medium
2001:db8::2 proto kernel metric 60 pref medium

After the fix:
+ ip addr change dev dummy1 2001:db8::1 peer 2001:db8::2 metric 61
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 61 pref medium
2001:db8::2 proto kernel metric 61 pref medium

Fixes: 8308f3ff1753 ("net/ipv6: Add support for specifying metric of connected routes")
Signed-off-by: Hangbin Liu <***@gmail.com>
Reviewed-by: David Ahern <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv6/addrconf.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4535,12 +4535,13 @@ inet6_rtm_deladdr(struct sk_buff *skb, s
}

static int modify_prefix_route(struct inet6_ifaddr *ifp,
- unsigned long expires, u32 flags)
+ unsigned long expires, u32 flags,
+ bool modify_peer)
{
struct fib6_info *f6i;
u32 prio;

- f6i = addrconf_get_prefix_route(&ifp->addr,
+ f6i = addrconf_get_prefix_route(modify_peer ? &ifp->peer_addr : &ifp->addr,
ifp->prefix_len,
ifp->idev->dev,
0, RTF_GATEWAY | RTF_DEFAULT);
@@ -4553,7 +4554,8 @@ static int modify_prefix_route(struct in
ip6_del_rt(dev_net(ifp->idev->dev), f6i);

/* add new one */
- addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
+ addrconf_prefix_route(modify_peer ? &ifp->peer_addr : &ifp->addr,
+ ifp->prefix_len,
ifp->rt_priority, ifp->idev->dev,
expires, flags, GFP_KERNEL);
} else {
@@ -4629,7 +4631,7 @@ static int inet6_addr_modify(struct inet
int rc = -ENOENT;

if (had_prefixroute)
- rc = modify_prefix_route(ifp, expires, flags);
+ rc = modify_prefix_route(ifp, expires, flags, false);

/* prefix route could have been deleted; if so restore it */
if (rc == -ENOENT) {
@@ -4637,6 +4639,15 @@ static int inet6_addr_modify(struct inet
ifp->rt_priority, ifp->idev->dev,
expires, flags, GFP_KERNEL);
}
+
+ if (had_prefixroute && !ipv6_addr_any(&ifp->peer_addr))
+ rc = modify_prefix_route(ifp, expires, flags, true);
+
+ if (rc == -ENOENT && !ipv6_addr_any(&ifp->peer_addr)) {
+ addrconf_prefix_route(&ifp->peer_addr, ifp->prefix_len,
+ ifp->rt_priority, ifp->idev->dev,
+ expires, flags, GFP_KERNEL);
+ }
} else if (had_prefixroute) {
enum cleanup_prefix_rt_t action;
unsigned long rt_expires;
Greg Kroah-Hartman
2020-03-17 10:54:48 UTC
Permalink
From: Hangbin Liu <***@gmail.com>

[ Upstream commit d0098e4c6b83e502cc1cd96d67ca86bc79a6c559 ]

When we modify the peer route and changed it to a new one, we should
remove the old route first. Before the fix:

+ ip addr add dev dummy1 2001:db8::1 peer 2001:db8::2
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 256 pref medium
2001:db8::2 proto kernel metric 256 pref medium
+ ip addr change dev dummy1 2001:db8::1 peer 2001:db8::3
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 256 pref medium
2001:db8::2 proto kernel metric 256 pref medium

After the fix:
+ ip addr change dev dummy1 2001:db8::1 peer 2001:db8::3
+ ip -6 route show dev dummy1
2001:db8::1 proto kernel metric 256 pref medium
2001:db8::3 proto kernel metric 256 pref medium

This patch depend on the previous patch "net/ipv6: need update peer route
when modify metric" to update new peer route after delete old one.

Signed-off-by: Hangbin Liu <***@gmail.com>
Reviewed-by: David Ahern <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/ipv6/addrconf.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1175,11 +1175,12 @@ check_cleanup_prefix_route(struct inet6_
}

static void
-cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt)
+cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires,
+ bool del_rt, bool del_peer)
{
struct fib6_info *f6i;

- f6i = addrconf_get_prefix_route(&ifp->addr,
+ f6i = addrconf_get_prefix_route(del_peer ? &ifp->peer_addr : &ifp->addr,
ifp->prefix_len,
ifp->idev->dev,
0, RTF_GATEWAY | RTF_DEFAULT);
@@ -1244,7 +1245,7 @@ static void ipv6_del_addr(struct inet6_i

if (action != CLEANUP_PREFIX_RT_NOP) {
cleanup_prefix_route(ifp, expires,
- action == CLEANUP_PREFIX_RT_DEL);
+ action == CLEANUP_PREFIX_RT_DEL, false);
}

/* clean up prefsrc entries */
@@ -4577,6 +4578,7 @@ static int inet6_addr_modify(struct inet
unsigned long timeout;
bool was_managetempaddr;
bool had_prefixroute;
+ bool new_peer = false;

ASSERT_RTNL();

@@ -4608,6 +4610,13 @@ static int inet6_addr_modify(struct inet
cfg->preferred_lft = timeout;
}

+ if (cfg->peer_pfx &&
+ memcmp(&ifp->peer_addr, cfg->peer_pfx, sizeof(struct in6_addr))) {
+ if (!ipv6_addr_any(&ifp->peer_addr))
+ cleanup_prefix_route(ifp, expires, true, true);
+ new_peer = true;
+ }
+
spin_lock_bh(&ifp->lock);
was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR;
had_prefixroute = ifp->flags & IFA_F_PERMANENT &&
@@ -4623,6 +4632,9 @@ static int inet6_addr_modify(struct inet
if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority)
ifp->rt_priority = cfg->rt_priority;

+ if (new_peer)
+ ifp->peer_addr = *cfg->peer_pfx;
+
spin_unlock_bh(&ifp->lock);
if (!(ifp->flags&IFA_F_TENTATIVE))
ipv6_ifa_notify(0, ifp);
@@ -4658,7 +4670,7 @@ static int inet6_addr_modify(struct inet

if (action != CLEANUP_PREFIX_RT_NOP) {
cleanup_prefix_route(ifp, rt_expires,
- action == CLEANUP_PREFIX_RT_DEL);
+ action == CLEANUP_PREFIX_RT_DEL, false);
}
}
Greg Kroah-Hartman
2020-03-17 10:54:49 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 213320a67962ff6e7b83b704d55cbebc341426db ]

Add missing attribute validation for TIPC_NLA_PROP_MTU
to the netlink policy.

Fixes: 901271e0403a ("tipc: implement configuration of UDP media MTU")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/tipc/netlink.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -110,7 +110,8 @@ const struct nla_policy tipc_nl_prop_pol
[TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
[TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
[TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
- [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 }
+ [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 },
+ [TIPC_NLA_PROP_MTU] = { .type = NLA_U32 }
};

const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
Greg Kroah-Hartman
2020-03-17 10:54:50 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit ff3b63b8c299b73ac599b120653b47e275407656 ]

DEVLINK_ATTR_REGION_CHUNK_ADDR and DEVLINK_ATTR_REGION_CHUNK_LEN
lack entries in the netlink policy. Corresponding nla_get_u64()s
may read beyond the end of the message.

Fixes: 4e54795a27f5 ("devlink: Add support for region snapshot read command")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Reviewed-by: Jiri Pirko <***@mellanox.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/core/devlink.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3607,6 +3607,8 @@ static const struct nla_policy devlink_n
[DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
+ [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
+ [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
};

static const struct genl_ops devlink_nl_ops[] = {
Greg Kroah-Hartman
2020-03-17 10:54:51 UTC
Permalink
From: Eric Dumazet <***@google.com>

commit b7469e83d2add567e4e0b063963db185f3167cea upstream.

Similar to commit 38f88c454042 ("bonding/alb: properly access headers
in bond_alb_xmit()"), we need to make sure arp header was pulled
in skb->head before blindly accessing it in rlb_arp_xmit().

Remove arp_pkt() private helper, since it is more readable/obvious
to have the following construct back to back :

if (!pskb_network_may_pull(skb, sizeof(*arp)))
return NULL;
arp = (struct arp_pkt *)skb_network_header(skb);

syzbot reported :

BUG: KMSAN: uninit-value in bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
BUG: KMSAN: uninit-value in rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
BUG: KMSAN: uninit-value in bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
CPU: 0 PID: 12743 Comm: syz-executor.4 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
__bond_start_xmit drivers/net/bonding/bond_main.c:4257 [inline]
bond_start_xmit+0x85d/0x2f70 drivers/net/bonding/bond_main.c:4282
__netdev_start_xmit include/linux/netdevice.h:4524 [inline]
netdev_start_xmit include/linux/netdevice.h:4538 [inline]
xmit_one net/core/dev.c:3470 [inline]
dev_hard_start_xmit+0x531/0xab0 net/core/dev.c:3486
__dev_queue_xmit+0x37de/0x4220 net/core/dev.c:4063
dev_queue_xmit+0x4b/0x60 net/core/dev.c:4096
packet_snd net/packet/af_packet.c:2967 [inline]
packet_sendmsg+0x8347/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c479
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc77ffbbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc77ffbc6d4 RCX: 000000000045c479
RDX: 000000000000000e RSI: 00000000200004c0 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a04 R14: 00000000004cc7b0 R15: 000000000076bf2c

Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
alloc_skb_with_frags+0x18c/0xa70 net/core/skbuff.c:5766
sock_alloc_send_pskb+0xada/0xc60 net/core/sock.c:2242
packet_alloc_skb net/packet/af_packet.c:2815 [inline]
packet_snd net/packet/af_packet.c:2910 [inline]
packet_sendmsg+0x66a0/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <***@google.com>
Reported-by: syzbot <***@googlegroups.com>
Cc: Jay Vosburgh <***@gmail.com>
Cc: Veaceslav Falico <***@gmail.com>
Cc: Andy Gospodarek <***@greyhouse.net>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/bonding/bond_alb.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)

--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -66,11 +66,6 @@ struct arp_pkt {
};
#pragma pack()

-static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
-{
- return (struct arp_pkt *)skb_network_header(skb);
-}
-
/* Forward declaration */
static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
bool strict_match);
@@ -568,10 +563,11 @@ static void rlb_req_update_subnet_client
spin_unlock(&bond->mode_lock);
}

-static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
+static struct slave *rlb_choose_channel(struct sk_buff *skb,
+ struct bonding *bond,
+ const struct arp_pkt *arp)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
- struct arp_pkt *arp = arp_pkt(skb);
struct slave *assigned_slave, *curr_active_slave;
struct rlb_client_info *client_info;
u32 hash_index = 0;
@@ -668,8 +664,12 @@ static struct slave *rlb_choose_channel(
*/
static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
{
- struct arp_pkt *arp = arp_pkt(skb);
struct slave *tx_slave = NULL;
+ struct arp_pkt *arp;
+
+ if (!pskb_network_may_pull(skb, sizeof(*arp)))
+ return NULL;
+ arp = (struct arp_pkt *)skb_network_header(skb);

/* Don't modify or load balance ARPs that do not originate locally
* (e.g.,arrive via a bridge).
@@ -679,7 +679,7 @@ static struct slave *rlb_arp_xmit(struct

if (arp->op_code == htons(ARPOP_REPLY)) {
/* the arp must be sent on the selected rx channel */
- tx_slave = rlb_choose_channel(skb, bond);
+ tx_slave = rlb_choose_channel(skb, bond, arp);
if (tx_slave)
bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
tx_slave->dev->addr_len);
@@ -690,7 +690,7 @@ static struct slave *rlb_arp_xmit(struct
* When the arp reply is received the entry will be updated
* with the correct unicast address of the client.
*/
- rlb_choose_channel(skb, bond);
+ rlb_choose_channel(skb, bond, arp);

/* The ARP reply packets must be delayed so that
* they can cancel out the influence of the ARP request.
Greg Kroah-Hartman
2020-03-17 10:54:53 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit ab14961d10d02d20767612c78ce148f6eb85bd58 ]

fec_enet_set_coalesce() validates the previously set params
and if they are within range proceeds to apply the new ones.
The new ones, however, are not validated. This seems backwards,
probably a copy-paste error?

Compile tested only.

Fixes: d851b47b22fc ("net: fec: add interrupt coalescence feature support")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Acked-by: Fugang Duan <***@nxp.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ethernet/freescale/fec_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2476,15 +2476,15 @@ fec_enet_set_coalesce(struct net_device
return -EINVAL;
}

- cycle = fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr);
+ cycle = fec_enet_us_to_itr_clock(ndev, ec->rx_coalesce_usecs);
if (cycle > 0xFFFF) {
pr_err("Rx coalesced usec exceed hardware limitation\n");
return -EINVAL;
}

- cycle = fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr);
+ cycle = fec_enet_us_to_itr_clock(ndev, ec->tx_coalesce_usecs);
if (cycle > 0xFFFF) {
- pr_err("Rx coalesced usec exceed hardware limitation\n");
+ pr_err("Tx coalesced usec exceed hardware limitation\n");
return -EINVAL;
}
Greg Kroah-Hartman
2020-03-17 10:54:54 UTC
Permalink
From: Mahesh Bandewar <***@google.com>

[ Upstream commit ce9a4186f9ac475c415ffd20348176a4ea366670 ]

The Rx bound multicast packets are deferred to a workqueue and
macvlan can also suffer from the same attack that was discovered
by Syzbot for IPvlan. This solution is not as effective as in
IPvlan. IPvlan defers all (Tx and Rx) multicast packet processing
to a workqueue while macvlan does this way only for the Rx. This
fix should address the Rx codition to certain extent.

Tx is still suseptible. Tx multicast processing happens when
.ndo_start_xmit is called, hence we cannot add cond_resched().
However, it's not that severe since the user which is generating
/ flooding will be affected the most.

Fixes: 412ca1550cbe ("macvlan: Move broadcasts into a work queue")
Signed-off-by: Mahesh Bandewar <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/macvlan.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -338,6 +338,8 @@ static void macvlan_process_broadcast(st
if (src)
dev_put(src->dev);
kfree_skb(skb);
+
+ cond_resched();
}
}
Greg Kroah-Hartman
2020-03-17 10:54:55 UTC
Permalink
From: Vasily Averin <***@virtuozzo.com>

commit 2d4ecb030dcc90fb725ecbfc82ce5d6c37906e0e upstream.

If seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output:

1) dd bs=1 skip output of each 2nd elements
$ dd if=/sys/fs/cgroup/cgroup.procs bs=8 count=1
2
3
4
5
1+0 records in
1+0 records out
8 bytes copied, 0,000267297 s, 29,9 kB/s
[***@localhost ~]$ dd if=/sys/fs/cgroup/cgroup.procs bs=1 count=8
2
4 <<< NB! 3 was skipped
6 <<< ... and 5 too
8 <<< ... and 7
8+0 records in
8+0 records out
8 bytes copied, 5,2123e-05 s, 153 kB/s

This happen because __cgroup_procs_start() makes an extra
extra cgroup_procs_next() call

2) read after lseek beyond end of file generates whole last line.
3) read after lseek into middle of last line generates
expected rest of last line and unexpected whole line once again.

Additionally patch removes an extra position index changes in
__cgroup_procs_start()

Cc: ***@vger.kernel.org
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <***@virtuozzo.com>
Signed-off-by: Tejun Heo <***@kernel.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
kernel/cgroup/cgroup.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4355,6 +4355,9 @@ static void *cgroup_procs_next(struct se
struct kernfs_open_file *of = s->private;
struct css_task_iter *it = of->priv;

+ if (pos)
+ (*pos)++;
+
return css_task_iter_next(it);
}

@@ -4370,7 +4373,7 @@ static void *__cgroup_procs_start(struct
* from position 0, so we can simply keep iterating on !0 *pos.
*/
if (!it) {
- if (WARN_ON_ONCE((*pos)++))
+ if (WARN_ON_ONCE((*pos)))
return ERR_PTR(-EINVAL);

it = kzalloc(sizeof(*it), GFP_KERNEL);
@@ -4378,10 +4381,11 @@ static void *__cgroup_procs_start(struct
return ERR_PTR(-ENOMEM);
of->priv = it;
css_task_iter_start(&cgrp->self, iter_flags, it);
- } else if (!(*pos)++) {
+ } else if (!(*pos)) {
css_task_iter_end(it);
css_task_iter_start(&cgrp->self, iter_flags, it);
- }
+ } else
+ return it->cur_task;

return cgroup_procs_next(s, NULL, NULL);
}
Greg Kroah-Hartman
2020-03-17 10:54:39 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 7e6dc03eeb023e18427a373522f1d247b916a641 ]

Add missing attribute validation for TCA_FQ_ORPHAN_MASK
to the netlink policy.

Fixes: 06eb395fa985 ("pkt_sched: fq: better control of DDOS traffic")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/sched/sch_fq.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -695,6 +695,7 @@ static const struct nla_policy fq_policy
[TCA_FQ_FLOW_MAX_RATE] = { .type = NLA_U32 },
[TCA_FQ_BUCKETS_LOG] = { .type = NLA_U32 },
[TCA_FQ_FLOW_REFILL_DELAY] = { .type = NLA_U32 },
+ [TCA_FQ_ORPHAN_MASK] = { .type = NLA_U32 },
[TCA_FQ_LOW_RATE_THRESHOLD] = { .type = NLA_U32 },
};
Greg Kroah-Hartman
2020-03-17 10:54:57 UTC
Permalink
From: Dan Moulding <***@me.com>

commit a9149d243f259ad8f02b1e23dfe8ba06128f15e1 upstream.

The logic for checking required NVM sections was recently fixed in
commit b3f20e098293 ("iwlwifi: mvm: fix NVM check for 3168
devices"). However, with that fixed the else is now taken for 3168
devices and within the else clause there is a mandatory check for the
PHY_SKU section. This causes the parsing to fail for 3168 devices.

The PHY_SKU section is really only mandatory for the IWL_NVM_EXT
layout (the phy_sku parameter of iwl_parse_nvm_data is only used when
the NVM type is IWL_NVM_EXT). So this changes the PHY_SKU section
check so that it's only mandatory for IWL_NVM_EXT.

Fixes: b3f20e098293 ("iwlwifi: mvm: fix NVM check for 3168 devices")
Signed-off-by: Dan Moulding <***@me.com>
Signed-off-by: Kalle Valo <***@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/net/wireless/intel/iwlwifi/mvm/nvm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c
@@ -314,7 +314,8 @@ iwl_parse_nvm_sections(struct iwl_mvm *m
}

/* PHY_SKU section is mandatory in B0 */
- if (!mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
+ if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT &&
+ !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
IWL_ERR(mvm,
"Can't parse phy_sku in B0, empty sections\n");
return NULL;
Greg Kroah-Hartman
2020-03-17 10:54:58 UTC
Permalink
From: Halil Pasic <***@linux.ibm.com>

commit f5f6b95c72f7f8bb46eace8c5306c752d0133daa upstream.

Since nobody else is going to restart our hw_queue for us, the
blk_mq_start_stopped_hw_queues() is in virtblk_done() is not sufficient
necessarily sufficient to ensure that the queue will get started again.
In case of global resource outage (-ENOMEM because mapping failure,
because of swiotlb full) our virtqueue may be empty and we can get
stuck with a stopped hw_queue.

Let us not stop the queue on arbitrary errors, but only on -EONSPC which
indicates a full virtqueue, where the hw_queue is guaranteed to get
started by virtblk_done() before when it makes sense to carry on
submitting requests. Let us also remove a stale comment.

Signed-off-by: Halil Pasic <***@linux.ibm.com>
Cc: Jens Axboe <***@kernel.dk>
Fixes: f7728002c1c7 ("virtio_ring: fix return code on DMA mapping fails")
Link: https://lore.kernel.org/r/20200213123728.61216-2-***@linux.ibm.com
Signed-off-by: Michael S. Tsirkin <***@redhat.com>
Reviewed-by: Stefan Hajnoczi <***@redhat.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/block/virtio_blk.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -271,10 +271,12 @@ static blk_status_t virtio_queue_rq(stru
err = virtblk_add_req(vblk->vqs[qid].vq, vbr, vbr->sg, num);
if (err) {
virtqueue_kick(vblk->vqs[qid].vq);
- blk_mq_stop_hw_queue(hctx);
+ /* Don't stop the queue if -ENOMEM: we may have failed to
+ * bounce the buffer due to global resource outage.
+ */
+ if (err == -ENOSPC)
+ blk_mq_stop_hw_queue(hctx);
spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
- /* Out of mem doesn't actually happen, since we fall back
- * to direct descriptors */
if (err == -ENOMEM || err == -ENOSPC)
return BLK_STS_DEV_RESOURCE;
return BLK_STS_IOERR;
Greg Kroah-Hartman
2020-03-17 10:54:59 UTC
Permalink
From: Hans de Goede <***@redhat.com>

commit 81ee85d0462410de8eeeec1b9761941fd6ed8c7b upstream.

Quoting from the comment describing the WARN functions in
include/asm-generic/bug.h:

* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant kernel issues that need prompt attention if they should ever
* appear at runtime.
*
* Do not use these macros when checking for invalid external inputs

The (buggy) firmware tables which the dmar code was calling WARN_TAINT
for really are invalid external inputs. They are not under the kernel's
control and the issues in them cannot be fixed by a kernel update.
So logging a backtrace, which invites bug reports to be filed about this,
is not helpful.

Fixes: 556ab45f9a77 ("ioat2: catch and recover from broken vtd configurations v6")
Signed-off-by: Hans de Goede <***@redhat.com>
Acked-by: Lu Baolu <***@linux.intel.com>
Link: https://lore.kernel.org/r/20200309182510.373875-1-***@redhat.com
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=701847
Signed-off-by: Joerg Roedel <***@suse.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/intel-iommu.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3998,10 +3998,11 @@ static void quirk_ioat_snb_local_iommu(s

/* we know that the this iommu should be at offset 0xa000 from vtbar */
drhd = dmar_find_matched_drhd_unit(pdev);
- if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000,
- TAINT_FIRMWARE_WORKAROUND,
- "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n"))
+ if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) {
+ pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n");
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO;
+ }
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu);
Greg Kroah-Hartman
2020-03-17 10:55:00 UTC
Permalink
From: Vasily Averin <***@virtuozzo.com>

commit dc15af8e9dbd039ebb06336597d2c491ef46ab74 upstream.

If .next function does not change position index,
following .show function will repeat output related
to current position index.

Cc: ***@vger.kernel.org
Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code ...")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <***@virtuozzo.com>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/nf_conntrack_standalone.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -390,7 +390,7 @@ static void *ct_cpu_seq_next(struct seq_
*pos = cpu + 1;
return per_cpu_ptr(net->ct.stat, cpu);
}
-
+ (*pos)++;
return NULL;
}
Greg Kroah-Hartman
2020-03-17 10:55:01 UTC
Permalink
From: Vasily Averin <***@virtuozzo.com>

commit bb71f846a0002239f7058c84f1496648ff4a5c20 upstream.

If .next function does not change position index,
following .show function will repeat output related
to current position index.

Cc: ***@vger.kernel.org
Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code ...")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <***@virtuozzo.com>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/nf_synproxy_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/nf_synproxy_core.c
+++ b/net/netfilter/nf_synproxy_core.c
@@ -273,7 +273,7 @@ static void *synproxy_cpu_seq_next(struc
*pos = cpu + 1;
return per_cpu_ptr(snet->stats, cpu);
}
-
+ (*pos)++;
return NULL;
}
Greg Kroah-Hartman
2020-03-17 10:55:02 UTC
Permalink
From: Vasily Averin <***@virtuozzo.com>

commit db25517a550926f609c63054b12ea9ad515e1a10 upstream.

If .next function does not change position index,
following .show function will repeat output related
to current position index.

Without the patch:
# dd if=/proc/net/xt_recent/SSH # original file outpt
src=127.0.0.4 ttl: 0 last_seen: 6275444819 oldest_pkt: 1 6275444819
src=127.0.0.2 ttl: 0 last_seen: 6275438906 oldest_pkt: 1 6275438906
src=127.0.0.3 ttl: 0 last_seen: 6275441953 oldest_pkt: 1 6275441953
0+1 records in
0+1 records out
204 bytes copied, 6.1332e-05 s, 3.3 MB/s

Read after lseek into middle of last line (offset 140 in example below)
generates expected end of last line and then unexpected whole last line
once again

# dd if=/proc/net/xt_recent/SSH bs=140 skip=1
dd: /proc/net/xt_recent/SSH: cannot skip to specified offset
127.0.0.3 ttl: 0 last_seen: 6275441953 oldest_pkt: 1 6275441953
src=127.0.0.3 ttl: 0 last_seen: 6275441953 oldest_pkt: 1 6275441953
0+1 records in
0+1 records out
132 bytes copied, 6.2487e-05 s, 2.1 MB/s

Cc: ***@vger.kernel.org
Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code ...")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <***@virtuozzo.com>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/xt_recent.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -497,12 +497,12 @@ static void *recent_seq_next(struct seq_
const struct recent_entry *e = v;
const struct list_head *head = e->list.next;

+ (*pos)++;
while (head == &t->iphash[st->bucket]) {
if (++st->bucket >= ip_list_hash_size)
return NULL;
head = t->iphash[st->bucket].next;
}
- (*pos)++;
return list_entry(head, struct recent_entry, list);
}
Greg Kroah-Hartman
2020-03-17 10:55:03 UTC
Permalink
From: Vasily Averin <***@virtuozzo.com>

commit ee84f19cbbe9cf7cba2958acb03163fed3ecbb0f upstream.

If .next function does not change position index,
following .show function will repeat output related
to current position index.

Without patch:
# dd if=/proc/net/ip_tables_matches # original file output
conntrack
conntrack
conntrack
recent
recent
icmp
udplite
udp
tcp
0+1 records in
0+1 records out
65 bytes copied, 5.4074e-05 s, 1.2 MB/s

# dd if=/proc/net/ip_tables_matches bs=62 skip=1
dd: /proc/net/ip_tables_matches: cannot skip to specified offset
cp <<< end of last line
tcp <<< and then unexpected whole last line once again
0+1 records in
0+1 records out
7 bytes copied, 0.000102447 s, 68.3 kB/s

Cc: ***@vger.kernel.org
Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code ...")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <***@virtuozzo.com>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/x_tables.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -1556,6 +1556,9 @@ static void *xt_mttg_seq_next(struct seq
uint8_t nfproto = (unsigned long)PDE_DATA(file_inode(seq->file));
struct nf_mttg_trav *trav = seq->private;

+ if (ppos != NULL)
+ ++(*ppos);
+
switch (trav->class) {
case MTTG_TRAV_INIT:
trav->class = MTTG_TRAV_NFP_UNSPEC;
@@ -1581,9 +1584,6 @@ static void *xt_mttg_seq_next(struct seq
default:
return NULL;
}
-
- if (ppos != NULL)
- ++*ppos;
return trav;
}
Greg Kroah-Hartman
2020-03-17 10:55:06 UTC
Permalink
From: Steven Rostedt (VMware) <***@goodmis.org>

commit 4d00fc477a2ce8b6d2b09fb34ef9fe9918e7d434 upstream.

Before rebooting the box, a "ssh sync" is called to the test machine to see
if it is alive or not. But if the test machine is in a partial state, that
ssh may never actually finish, and the ktest test hangs.

Add a 10 second timeout to the sync test, which will fail after 10 seconds
and then cause the test to reboot the test machine.

Cc: ***@vger.kernel.org
Fixes: 6474ace999edd ("ktest.pl: Powercycle the box on reboot if no connection can be made")
Signed-off-by: Steven Rostedt (VMware) <***@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
tools/testing/ktest/ktest.pl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -1372,7 +1372,7 @@ sub reboot {

} else {
# Make sure everything has been written to disk
- run_ssh("sync");
+ run_ssh("sync", 10);

if (defined($time)) {
start_monitor;
Greg Kroah-Hartman
2020-03-17 10:54:40 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit dd25cb272ccce4db67dc8509278229099e4f5e99 ]

Add missing attribute validation for TEAM_ATTR_OPTION_PORT_IFINDEX
to the netlink policy.

Fixes: 80f7c6683fe0 ("team: add support for per-port options")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Reviewed-by: Jiri Pirko <***@mellanox.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/team/team.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2215,6 +2215,7 @@ team_nl_option_policy[TEAM_ATTR_OPTION_M
[TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
[TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
[TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
+ [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
};

static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
Greg Kroah-Hartman
2020-03-17 10:55:08 UTC
Permalink
From: Al Viro <***@zeniv.linux.org.uk>

commit 21039132650281de06a169cbe8a0f7e5c578fd8b upstream.

with the way fs/namei.c:do_last() had been done, ->atomic_open()
instances needed to recognize the case when existing file got
found with O_EXCL|O_CREAT, either by falling back to finish_no_open()
or failing themselves. gfs2 one didn't.

Fixes: 6d4ade986f9c (GFS2: Add atomic_open support)
Cc: ***@kernel.org # v3.11
Signed-off-by: Al Viro <***@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
fs/gfs2/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1251,7 +1251,7 @@ static int gfs2_atomic_open(struct inode
if (!(file->f_mode & FMODE_OPENED))
return finish_no_open(file, d);
dput(d);
- return 0;
+ return excl && (flags & O_CREAT) ? -EEXIST : 0;
}

BUG_ON(d != NULL);
Greg Kroah-Hartman
2020-03-17 10:55:07 UTC
Permalink
From: Al Viro <***@zeniv.linux.org.uk>

commit d9a9f4849fe0c9d560851ab22a85a666cddfdd24 upstream.

several iterations of ->atomic_open() calling conventions ago, we
used to need fput() if ->atomic_open() failed at some point after
successful finish_open(). Now (since 2016) it's not needed -
struct file carries enough state to make fput() work regardless
of the point in struct file lifecycle and discarding it on
failure exits in open() got unified. Unfortunately, I'd missed
the fact that we had an instance of ->atomic_open() (cifs one)
that used to need that fput(), as well as the stale comment in
finish_open() demanding such late failure handling. Trivially
fixed...

Fixes: fe9ec8291fca "do_last(): take fput() on error after opening to out:"
Cc: ***@kernel.org # v4.7+
Signed-off-by: Al Viro <***@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
Documentation/filesystems/porting | 7 +++++++
fs/cifs/dir.c | 1 -
fs/open.c | 3 ---
3 files changed, 7 insertions(+), 4 deletions(-)

--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -627,3 +627,10 @@ in your dentry operations instead.
DCACHE_RCUACCESS is gone; having an RCU delay on dentry freeing is the
default. DCACHE_NORCU opts out, and only d_alloc_pseudo() has any
business doing so.
+--
+[mandatory]
+
+ [should've been added in 2016] stale comment in finish_open()
+ nonwithstanding, failure exits in ->atomic_open() instances should
+ *NOT* fput() the file, no matter what. Everything is handled by the
+ caller.
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -561,7 +561,6 @@ cifs_atomic_open(struct inode *inode, st
if (server->ops->close)
server->ops->close(xid, tcon, &fid);
cifs_del_pending_open(&open);
- fput(file);
rc = -ENOMEM;
}

--- a/fs/open.c
+++ b/fs/open.c
@@ -851,9 +851,6 @@ cleanup_file:
* the return value of d_splice_alias(), then the caller needs to perform dput()
* on it after finish_open().
*
- * On successful return @file is a fully instantiated open file. After this, if
- * an error occurs in ->atomic_open(), it needs to clean up with fput().
- *
* Returns zero on success or -errno if the open failed.
*/
int finish_open(struct file *file, struct dentry *dentry,
Greg Kroah-Hartman
2020-03-17 10:55:09 UTC
Permalink
From: Vitaly Kuznetsov <***@redhat.com>

commit 342993f96ab24d5864ab1216f46c0b199c2baf8e upstream.

After commit 07721feee46b ("KVM: nVMX: Don't emulate instructions in guest
mode") Hyper-V guests on KVM stopped booting with:

kvm_nested_vmexit: rip fffff802987d6169 reason EPT_VIOLATION info1 181
info2 0 int_info 0 int_info_err 0
kvm_page_fault: address febd0000 error_code 181
kvm_emulate_insn: 0:fffff802987d6169: f3 a5
kvm_emulate_insn: 0:fffff802987d6169: f3 a5 FAIL
kvm_inj_exception: #UD (0x0)

"f3 a5" is a "rep movsw" instruction, which should not be intercepted
at all. Commit c44b4c6ab80e ("KVM: emulate: clean up initializations in
init_decode_cache") reduced the number of fields cleared by
init_decode_cache() claiming that they are being cleared elsewhere,
'intercept', however, is left uncleared if the instruction does not have
any of the "slow path" flags (NotImpl, Stack, Op3264, Sse, Mmx, CheckPerm,
NearBranch, No16 and of course Intercept itself).

Fixes: c44b4c6ab80e ("KVM: emulate: clean up initializations in init_decode_cache")
Fixes: 07721feee46b ("KVM: nVMX: Don't emulate instructions in guest mode")
Cc: ***@vger.kernel.org
Suggested-by: Paolo Bonzini <***@redhat.com>
Signed-off-by: Vitaly Kuznetsov <***@redhat.com>
Reviewed-by: Sean Christopherson <***@intel.com>
Signed-off-by: Paolo Bonzini <***@redhat.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
arch/x86/kvm/emulate.c | 1 +
1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5112,6 +5112,7 @@ int x86_decode_insn(struct x86_emulate_c
ctxt->fetch.ptr = ctxt->fetch.data;
ctxt->fetch.end = ctxt->fetch.data + insn_len;
ctxt->opcode_len = 1;
+ ctxt->intercept = x86_intercept_none;
if (insn_len > 0)
memcpy(ctxt->fetch.data, insn, insn_len);
else {
Greg Kroah-Hartman
2020-03-17 10:55:11 UTC
Permalink
From: Wolfram Sang <***@the-dreams.de>

commit bcf3588d8ed3517e6ffaf083f034812aee9dc8e2 upstream.

Commit af503716ac14 made sure OF devices get an OF style modalias with
I2C events. It assumed all in-tree users were converted, yet it missed
some Macintosh drivers.

Add an OF module device table for all windfarm drivers to make them
automatically load again.

Fixes: af503716ac14 ("i2c: core: report OF style module alias for devices registered via OF")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=199471
Reported-by: Erhard Furtner <***@mailbox.org>
Tested-by: Erhard Furtner <***@mailbox.org>
Acked-by: Michael Ellerman <***@ellerman.id.au> (powerpc)
Signed-off-by: Wolfram Sang <***@the-dreams.de>
Cc: ***@kernel.org # v4.17+
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/macintosh/windfarm_ad7417_sensor.c | 7 +++++++
drivers/macintosh/windfarm_fcu_controls.c | 7 +++++++
drivers/macintosh/windfarm_lm75_sensor.c | 16 +++++++++++++++-
drivers/macintosh/windfarm_lm87_sensor.c | 7 +++++++
drivers/macintosh/windfarm_max6690_sensor.c | 7 +++++++
drivers/macintosh/windfarm_smu_sat.c | 7 +++++++
6 files changed, 50 insertions(+), 1 deletion(-)

--- a/drivers/macintosh/windfarm_ad7417_sensor.c
+++ b/drivers/macintosh/windfarm_ad7417_sensor.c
@@ -313,9 +313,16 @@ static const struct i2c_device_id wf_ad7
};
MODULE_DEVICE_TABLE(i2c, wf_ad7417_id);

+static const struct of_device_id wf_ad7417_of_id[] = {
+ { .compatible = "ad7417", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_ad7417_of_id);
+
static struct i2c_driver wf_ad7417_driver = {
.driver = {
.name = "wf_ad7417",
+ .of_match_table = wf_ad7417_of_id,
},
.probe = wf_ad7417_probe,
.remove = wf_ad7417_remove,
--- a/drivers/macintosh/windfarm_fcu_controls.c
+++ b/drivers/macintosh/windfarm_fcu_controls.c
@@ -583,9 +583,16 @@ static const struct i2c_device_id wf_fcu
};
MODULE_DEVICE_TABLE(i2c, wf_fcu_id);

+static const struct of_device_id wf_fcu_of_id[] = {
+ { .compatible = "fcu", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_fcu_of_id);
+
static struct i2c_driver wf_fcu_driver = {
.driver = {
.name = "wf_fcu",
+ .of_match_table = wf_fcu_of_id,
},
.probe = wf_fcu_probe,
.remove = wf_fcu_remove,
--- a/drivers/macintosh/windfarm_lm75_sensor.c
+++ b/drivers/macintosh/windfarm_lm75_sensor.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/wait.h>
#include <linux/i2c.h>
+#include <linux/of_device.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/io.h>
@@ -92,9 +93,14 @@ static int wf_lm75_probe(struct i2c_clie
const struct i2c_device_id *id)
{
struct wf_lm75_sensor *lm;
- int rc, ds1775 = id->driver_data;
+ int rc, ds1775;
const char *name, *loc;

+ if (id)
+ ds1775 = id->driver_data;
+ else
+ ds1775 = !!of_device_get_match_data(&client->dev);
+
DBG("wf_lm75: creating %s device at address 0x%02x\n",
ds1775 ? "ds1775" : "lm75", client->addr);

@@ -165,9 +171,17 @@ static const struct i2c_device_id wf_lm7
};
MODULE_DEVICE_TABLE(i2c, wf_lm75_id);

+static const struct of_device_id wf_lm75_of_id[] = {
+ { .compatible = "lm75", .data = (void *)0},
+ { .compatible = "ds1775", .data = (void *)1 },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_lm75_of_id);
+
static struct i2c_driver wf_lm75_driver = {
.driver = {
.name = "wf_lm75",
+ .of_match_table = wf_lm75_of_id,
},
.probe = wf_lm75_probe,
.remove = wf_lm75_remove,
--- a/drivers/macintosh/windfarm_lm87_sensor.c
+++ b/drivers/macintosh/windfarm_lm87_sensor.c
@@ -168,9 +168,16 @@ static const struct i2c_device_id wf_lm8
};
MODULE_DEVICE_TABLE(i2c, wf_lm87_id);

+static const struct of_device_id wf_lm87_of_id[] = {
+ { .compatible = "lm87cimt", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_lm87_of_id);
+
static struct i2c_driver wf_lm87_driver = {
.driver = {
.name = "wf_lm87",
+ .of_match_table = wf_lm87_of_id,
},
.probe = wf_lm87_probe,
.remove = wf_lm87_remove,
--- a/drivers/macintosh/windfarm_max6690_sensor.c
+++ b/drivers/macintosh/windfarm_max6690_sensor.c
@@ -121,9 +121,16 @@ static const struct i2c_device_id wf_max
};
MODULE_DEVICE_TABLE(i2c, wf_max6690_id);

+static const struct of_device_id wf_max6690_of_id[] = {
+ { .compatible = "max6690", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_max6690_of_id);
+
static struct i2c_driver wf_max6690_driver = {
.driver = {
.name = "wf_max6690",
+ .of_match_table = wf_max6690_of_id,
},
.probe = wf_max6690_probe,
.remove = wf_max6690_remove,
--- a/drivers/macintosh/windfarm_smu_sat.c
+++ b/drivers/macintosh/windfarm_smu_sat.c
@@ -343,9 +343,16 @@ static const struct i2c_device_id wf_sat
};
MODULE_DEVICE_TABLE(i2c, wf_sat_id);

+static const struct of_device_id wf_sat_of_id[] = {
+ { .compatible = "smu-sat", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wf_sat_of_id);
+
static struct i2c_driver wf_sat_driver = {
.driver = {
.name = "wf_smu_sat",
+ .of_match_table = wf_sat_of_id,
},
.probe = wf_sat_probe,
.remove = wf_sat_remove,
Greg Kroah-Hartman
2020-03-17 10:55:12 UTC
Permalink
From: Vladis Dronov <***@redhat.com>

commit 286d3250c9d6437340203fb64938bea344729a0e upstream.

There is a race and a buffer overflow corrupting a kernel memory while
reading an EFI variable with a size more than 1024 bytes via the older
sysfs method. This happens because accessing struct efi_variable in
efivar_{attr,size,data}_read() and friends is not protected from
a concurrent access leading to a kernel memory corruption and, at best,
to a crash. The race scenario is the following:

CPU0: CPU1:
efivar_attr_read()
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
efivar_attr_read() // same EFI var
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
virt_efi_get_variable()
// returns EFI_BUFFER_TOO_SMALL but
// var->DataSize is set to a real
// var size more than 1024 bytes
up(&efivars_lock)
virt_efi_get_variable()
// called with var->DataSize set
// to a real var size, returns
// successfully and overwrites
// a 1024-bytes kernel buffer
up(&efivars_lock)

This can be reproduced by concurrent reading of an EFI variable which size
is more than 1024 bytes:

ts# for cpu in $(seq 0 $(nproc --ignore=1)); do ( taskset -c $cpu \
cat /sys/firmware/efi/vars/KEKDefault*/size & ) ; done

Fix this by using a local variable for a var's data buffer size so it
does not get overwritten.

Fixes: e14ab23dde12b80d ("efivars: efivar_entry API")
Reported-by: Bob Sanders <***@hpe.com> and the LTP testsuite
Signed-off-by: Vladis Dronov <***@redhat.com>
Signed-off-by: Ard Biesheuvel <***@kernel.org>
Signed-off-by: Ingo Molnar <***@kernel.org>
Cc: <***@vger.kernel.org>
Link: https://lore.kernel.org/r/20200305084041.24053-2-***@redhat.com
Link: https://lore.kernel.org/r/20200308080859.21568-24-***@kernel.org
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/firmware/efi/efivars.c | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)

--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -139,13 +139,16 @@ static ssize_t
efivar_attr_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
char *str = buf;
+ int ret;

if (!entry || !buf)
return -EINVAL;

- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;

if (var->Attributes & EFI_VARIABLE_NON_VOLATILE)
@@ -172,13 +175,16 @@ static ssize_t
efivar_size_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
char *str = buf;
+ int ret;

if (!entry || !buf)
return -EINVAL;

- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;

str += sprintf(str, "0x%lx\n", var->DataSize);
@@ -189,12 +195,15 @@ static ssize_t
efivar_data_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
+ int ret;

if (!entry || !buf)
return -EINVAL;

- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;

memcpy(buf, var->Data, var->DataSize);
@@ -314,14 +323,16 @@ efivar_show_raw(struct efivar_entry *ent
{
struct efi_variable *var = &entry->var;
struct compat_efi_variable *compat;
+ unsigned long datasize = sizeof(var->Data);
size_t size;
+ int ret;

if (!entry || !buf)
return 0;

- var->DataSize = 1024;
- if (efivar_entry_get(entry, &entry->var.Attributes,
- &entry->var.DataSize, entry->var.Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &datasize, var->Data);
+ var->DataSize = datasize;
+ if (ret)
return -EIO;

if (is_compat()) {
Greg Kroah-Hartman
2020-03-17 10:55:13 UTC
Permalink
From: Sai Praneeth <***@intel.com>

commit 9dbbedaa6171247c4c7c40b83f05b200a117c2e0 upstream.

After the kernel has booted, if any accesses by firmware causes a page
fault, the efi page fault handler would freeze efi_rts_wq and schedules
a new process. To do this, the efi page fault handler needs
efi_rts_work. Hence, make it accessible.

There will be no race conditions in accessing this structure, because
all the calls to efi runtime services are already serialized.

Tested-by: Bhupesh Sharma <***@redhat.com>
Suggested-by: Matt Fleming <***@codeblueprint.co.uk>
Based-on-code-from: Ricardo Neri <***@intel.com>
Signed-off-by: Sai Praneeth Prakhya <***@intel.com>
Signed-off-by: Ard Biesheuvel <***@linaro.org>
Fixes: 3eb420e70d87 (“efi: Use a work queue to invoke EFI Runtime Services”)
Signed-off-by: Wen Yang <***@linux.alibaba.com>
Cc: Caspar Zhang <***@linux.alibaba.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/firmware/efi/runtime-wrappers.c | 53 +++++---------------------------
include/linux/efi.h | 36 +++++++++++++++++++++
2 files changed, 45 insertions(+), 44 deletions(-)

--- a/drivers/firmware/efi/runtime-wrappers.c
+++ b/drivers/firmware/efi/runtime-wrappers.c
@@ -45,39 +45,7 @@
#define __efi_call_virt(f, args...) \
__efi_call_virt_pointer(efi.systab->runtime, f, args)

-/* efi_runtime_service() function identifiers */
-enum efi_rts_ids {
- GET_TIME,
- SET_TIME,
- GET_WAKEUP_TIME,
- SET_WAKEUP_TIME,
- GET_VARIABLE,
- GET_NEXT_VARIABLE,
- SET_VARIABLE,
- QUERY_VARIABLE_INFO,
- GET_NEXT_HIGH_MONO_COUNT,
- UPDATE_CAPSULE,
- QUERY_CAPSULE_CAPS,
-};
-
-/*
- * efi_runtime_work: Details of EFI Runtime Service work
- * @arg<1-5>: EFI Runtime Service function arguments
- * @status: Status of executing EFI Runtime Service
- * @efi_rts_id: EFI Runtime Service function identifier
- * @efi_rts_comp: Struct used for handling completions
- */
-struct efi_runtime_work {
- void *arg1;
- void *arg2;
- void *arg3;
- void *arg4;
- void *arg5;
- efi_status_t status;
- struct work_struct work;
- enum efi_rts_ids efi_rts_id;
- struct completion efi_rts_comp;
-};
+struct efi_runtime_work efi_rts_work;

/*
* efi_queue_work: Queue efi_runtime_service() and wait until it's done
@@ -91,7 +59,6 @@ struct efi_runtime_work {
*/
#define efi_queue_work(_rts, _arg1, _arg2, _arg3, _arg4, _arg5) \
({ \
- struct efi_runtime_work efi_rts_work; \
efi_rts_work.status = EFI_ABORTED; \
\
init_completion(&efi_rts_work.efi_rts_comp); \
@@ -191,18 +158,16 @@ extern struct semaphore __efi_uv_runtime
*/
static void efi_call_rts(struct work_struct *work)
{
- struct efi_runtime_work *efi_rts_work;
void *arg1, *arg2, *arg3, *arg4, *arg5;
efi_status_t status = EFI_NOT_FOUND;

- efi_rts_work = container_of(work, struct efi_runtime_work, work);
- arg1 = efi_rts_work->arg1;
- arg2 = efi_rts_work->arg2;
- arg3 = efi_rts_work->arg3;
- arg4 = efi_rts_work->arg4;
- arg5 = efi_rts_work->arg5;
+ arg1 = efi_rts_work.arg1;
+ arg2 = efi_rts_work.arg2;
+ arg3 = efi_rts_work.arg3;
+ arg4 = efi_rts_work.arg4;
+ arg5 = efi_rts_work.arg5;

- switch (efi_rts_work->efi_rts_id) {
+ switch (efi_rts_work.efi_rts_id) {
case GET_TIME:
status = efi_call_virt(get_time, (efi_time_t *)arg1,
(efi_time_cap_t *)arg2);
@@ -260,8 +225,8 @@ static void efi_call_rts(struct work_str
*/
pr_err("Requested executing invalid EFI Runtime Service.\n");
}
- efi_rts_work->status = status;
- complete(&efi_rts_work->efi_rts_comp);
+ efi_rts_work.status = status;
+ complete(&efi_rts_work.efi_rts_comp);
}

static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1664,6 +1664,42 @@ struct linux_efi_tpm_eventlog {

extern int efi_tpm_eventlog_init(void);

+/* efi_runtime_service() function identifiers */
+enum efi_rts_ids {
+ GET_TIME,
+ SET_TIME,
+ GET_WAKEUP_TIME,
+ SET_WAKEUP_TIME,
+ GET_VARIABLE,
+ GET_NEXT_VARIABLE,
+ SET_VARIABLE,
+ QUERY_VARIABLE_INFO,
+ GET_NEXT_HIGH_MONO_COUNT,
+ UPDATE_CAPSULE,
+ QUERY_CAPSULE_CAPS,
+};
+
+/*
+ * efi_runtime_work: Details of EFI Runtime Service work
+ * @arg<1-5>: EFI Runtime Service function arguments
+ * @status: Status of executing EFI Runtime Service
+ * @efi_rts_id: EFI Runtime Service function identifier
+ * @efi_rts_comp: Struct used for handling completions
+ */
+struct efi_runtime_work {
+ void *arg1;
+ void *arg2;
+ void *arg3;
+ void *arg4;
+ void *arg5;
+ efi_status_t status;
+ struct work_struct work;
+ enum efi_rts_ids efi_rts_id;
+ struct completion efi_rts_comp;
+};
+
+extern struct efi_runtime_work efi_rts_work;
+
/* Workqueue to queue EFI Runtime Services */
extern struct workqueue_struct *efi_rts_wq;
Greg Kroah-Hartman
2020-03-17 10:55:14 UTC
Permalink
From: Felix Fietkau <***@nbd.name>

commit b102f0c522cf668c8382c56a4f771b37d011cda2 upstream.

If the hardware receives an oversized packet with too many rx fragments,
skb_shinfo(skb)->frags can overflow and corrupt memory of adjacent pages.
This becomes especially visible if it corrupts the freelist pointer of
a slab page.

Cc: ***@vger.kernel.org
Signed-off-by: Felix Fietkau <***@nbd.name>
Signed-off-by: Kalle Valo <***@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/net/wireless/mediatek/mt76/dma.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -396,10 +396,13 @@ mt76_add_fragment(struct mt76_dev *dev,
struct page *page = virt_to_head_page(data);
int offset = data - page_address(page);
struct sk_buff *skb = q->rx_head;
+ struct skb_shared_info *shinfo = skb_shinfo(skb);

- offset += q->buf_offset;
- skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, offset, len,
- q->buf_size);
+ if (shinfo->nr_frags < ARRAY_SIZE(shinfo->frags)) {
+ offset += q->buf_offset;
+ skb_add_rx_frag(skb, shinfo->nr_frags, page, offset, len,
+ q->buf_size);
+ }

if (more)
return;
Greg Kroah-Hartman
2020-03-17 10:55:15 UTC
Permalink
From: Tony Luck <***@intel.com>

commit 59b5809655bdafb0767d3fd00a3e41711aab07e6 upstream.

There are two implemented bits in the PPIN_CTL MSR:

Bit 0: LockOut (R/WO)
Set 1 to prevent further writes to MSR_PPIN_CTL.

Bit 1: Enable_PPIN (R/W)
If 1, enables MSR_PPIN to be accessible using RDMSR.
If 0, an attempt to read MSR_PPIN will cause #GP.

So there are four defined values:
0: PPIN is disabled, PPIN_CTL may be updated
1: PPIN is disabled. PPIN_CTL is locked against updates
2: PPIN is enabled. PPIN_CTL may be updated
3: PPIN is enabled. PPIN_CTL is locked against updates

Code would only enable the X86_FEATURE_INTEL_PPIN feature for case "2".
When it should have done so for both case "2" and case "3".

Fix the final test to just check for the enable bit. Also fix some of
the other comments in this function.

Fixes: 3f5a7896a509 ("x86/mce: Include the PPIN in MCE records when available")
Signed-off-by: Tony Luck <***@intel.com>
Signed-off-by: Borislav Petkov <***@suse.de>
Cc: <***@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200226011737.9958-1-***@intel.com
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
arch/x86/kernel/cpu/mcheck/mce_intel.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -489,17 +489,18 @@ static void intel_ppin_init(struct cpuin
return;

if ((val & 3UL) == 1UL) {
- /* PPIN available but disabled: */
+ /* PPIN locked in disabled mode */
return;
}

- /* If PPIN is disabled, but not locked, try to enable: */
- if (!(val & 3UL)) {
+ /* If PPIN is disabled, try to enable */
+ if (!(val & 2UL)) {
wrmsrl_safe(MSR_PPIN_CTL, val | 2UL);
rdmsrl_safe(MSR_PPIN_CTL, &val);
}

- if ((val & 3UL) == 2UL)
+ /* Is the enable bit set? */
+ if (val & 2UL)
set_cpu_cap(c, X86_FEATURE_INTEL_PPIN);
}
}
Greg Kroah-Hartman
2020-03-17 10:55:16 UTC
Permalink
From: Marc Zyngier <***@kernel.org>

commit 65ac74f1de3334852fb7d9b1b430fa5a06524276 upstream.

The way cookie_init_hw_msi_region() allocates the iommu_dma_msi_page
structures doesn't match the way iommu_put_dma_cookie() frees them.

The former performs a single allocation of all the required structures,
while the latter tries to free them one at a time. It doesn't quite
work for the main use case (the GICv3 ITS where the range is 64kB)
when the base granule size is 4kB.

This leads to a nice slab corruption on teardown, which is easily
observable by simply creating a VF on a SRIOV-capable device, and
tearing it down immediately (no need to even make use of it).
Fortunately, this only affects systems where the ITS isn't translated
by the SMMU, which are both rare and non-standard.

Fix it by allocating iommu_dma_msi_page structures one at a time.

Fixes: 7c1b058c8b5a3 ("iommu/dma: Handle IOMMU API reserved regions")
Signed-off-by: Marc Zyngier <***@kernel.org>
Reviewed-by: Eric Auger <***@redhat.com>
Cc: Robin Murphy <***@arm.com>
Cc: Joerg Roedel <***@suse.de>
Cc: Will Deacon <***@kernel.org>
Cc: ***@vger.kernel.org
Reviewed-by: Robin Murphy <***@arm.com>
Signed-off-by: Joerg Roedel <***@suse.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/dma-iommu.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -190,15 +190,15 @@ static int cookie_init_hw_msi_region(str
start -= iova_offset(iovad, start);
num_pages = iova_align(iovad, end - start) >> iova_shift(iovad);

- msi_page = kcalloc(num_pages, sizeof(*msi_page), GFP_KERNEL);
- if (!msi_page)
- return -ENOMEM;
-
for (i = 0; i < num_pages; i++) {
- msi_page[i].phys = start;
- msi_page[i].iova = start;
- INIT_LIST_HEAD(&msi_page[i].list);
- list_add(&msi_page[i].list, &cookie->msi_page_list);
+ msi_page = kmalloc(sizeof(*msi_page), GFP_KERNEL);
+ if (!msi_page)
+ return -ENOMEM;
+
+ msi_page->phys = start;
+ msi_page->iova = start;
+ INIT_LIST_HEAD(&msi_page->list);
+ list_add(&msi_page->list, &cookie->msi_page_list);
start += iovad->granule;
}
Greg Kroah-Hartman
2020-03-17 10:54:42 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 361d23e41ca6e504033f7e66a03b95788377caae ]

Add missing attribute validation for NFC_ATTR_SE_INDEX
to the netlink policy.

Fixes: 5ce3f32b5264 ("NFC: netlink: SE API implementation")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/nfc/netlink.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -55,6 +55,7 @@ static const struct nla_policy nfc_genl_
[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
[NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
.len = NFC_FIRMWARE_NAME_MAXSIZE },
+ [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
[NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
[NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
Greg Kroah-Hartman
2020-03-17 10:54:41 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 669fcd7795900cd1880237cbbb57a7db66cb9ac8 ]

Add missing attribute validation for TEAM_ATTR_OPTION_ARRAY_INDEX
to the netlink policy.

Fixes: b13033262d24 ("team: introduce array options")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Reviewed-by: Jiri Pirko <***@mellanox.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/team/team.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2216,6 +2216,7 @@ team_nl_option_policy[TEAM_ATTR_OPTION_M
[TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
[TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
[TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
+ [TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 },
};

static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
Greg Kroah-Hartman
2020-03-17 10:54:44 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 6ba3da446551f2150fadbf8c7788edcb977683d3 ]

Add missing attribute validation for vendor subcommand attributes
to the netlink policy.

Fixes: 9e58095f9660 ("NFC: netlink: Implement vendor command support")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/nfc/netlink.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -58,6 +58,8 @@ static const struct nla_policy nfc_genl_
.len = NFC_FIRMWARE_NAME_MAXSIZE },
[NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
[NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
+ [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 },
+ [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
[NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },

};
Greg Kroah-Hartman
2020-03-17 10:54:45 UTC
Permalink
From: Heiner Kallweit <***@gmail.com>

[ Upstream commit 611d779af7cad2b87487ff58e4931a90c20b113c ]

So far we have the unfortunate situation that mdio_bus_phy_may_suspend()
is called in suspend AND resume path, assuming that function result is
the same. After the original change this is no longer the case,
resulting in broken resume as reported by Geert.

To fix this call mdio_bus_phy_may_suspend() in the suspend path only,
and let the phy_device store the info whether it was suspended by
MDIO bus PM.

Fixes: 503ba7c69610 ("net: phy: Avoid multiple suspends")
Reported-by: Geert Uytterhoeven <***@linux-m68k.org>
Tested-by: Geert Uytterhoeven <***@linux-m68k.org>
Signed-off-by: Heiner Kallweit <***@gmail.com>
Reviewed-by: Florian Fainelli <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/phy/phy_device.c | 6 +++++-
include/linux/phy.h | 2 ++
2 files changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -130,6 +130,8 @@ static int mdio_bus_phy_suspend(struct d
if (!mdio_bus_phy_may_suspend(phydev))
return 0;

+ phydev->suspended_by_mdio_bus = 1;
+
return phy_suspend(phydev);
}

@@ -138,9 +140,11 @@ static int mdio_bus_phy_resume(struct de
struct phy_device *phydev = to_phy_device(dev);
int ret;

- if (!mdio_bus_phy_may_suspend(phydev))
+ if (!phydev->suspended_by_mdio_bus)
goto no_resume;

+ phydev->suspended_by_mdio_bus = 0;
+
ret = phy_resume(phydev);
if (ret < 0)
return ret;
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -373,6 +373,7 @@ struct phy_c45_device_ids {
* is_pseudo_fixed_link: Set to true if this phy is an Ethernet switch, etc.
* has_fixups: Set to true if this phy has fixups/quirks.
* suspended: Set to true if this phy has been suspended successfully.
+ * suspended_by_mdio_bus: Set to true if this phy was suspended by MDIO bus.
* sysfs_links: Internal boolean tracking sysfs symbolic links setup/removal.
* loopback_enabled: Set true if this phy has been loopbacked successfully.
* state: state of the PHY for management purposes
@@ -411,6 +412,7 @@ struct phy_device {
unsigned is_pseudo_fixed_link:1;
unsigned has_fixups:1;
unsigned suspended:1;
+ unsigned suspended_by_mdio_bus:1;
unsigned sysfs_links:1;
unsigned loopback_enabled:1;
Greg Kroah-Hartman
2020-03-17 10:54:46 UTC
Permalink
From: Hangbin Liu <***@gmail.com>

[ Upstream commit 0d29169a708bf730ede287248e429d579f432d1d ]

This patch update {ipv4, ipv6}_addr_metric_test with
1. Set metric of address with peer route and see if the route added
correctly.
2. Modify metric and peer address for peer route and see if the route
changed correctly.

Signed-off-by: Hangbin Liu <***@gmail.com>
Reviewed-by: David Ahern <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
tools/testing/selftests/net/fib_tests.sh | 34 ++++++++++++++++++++++++++++---
1 file changed, 31 insertions(+), 3 deletions(-)

--- a/tools/testing/selftests/net/fib_tests.sh
+++ b/tools/testing/selftests/net/fib_tests.sh
@@ -979,6 +979,27 @@ ipv6_addr_metric_test()
fi
log_test $rc 0 "Prefix route with metric on link up"

+ # verify peer metric added correctly
+ set -e
+ run_cmd "$IP -6 addr flush dev dummy2"
+ run_cmd "$IP -6 addr add dev dummy2 2001:db8:104::1 peer 2001:db8:104::2 metric 260"
+ set +e
+
+ check_route6 "2001:db8:104::1 dev dummy2 proto kernel metric 260"
+ log_test $? 0 "Set metric with peer route on local side"
+ log_test $? 0 "User specified metric on local address"
+ check_route6 "2001:db8:104::2 dev dummy2 proto kernel metric 260"
+ log_test $? 0 "Set metric with peer route on peer side"
+
+ set -e
+ run_cmd "$IP -6 addr change dev dummy2 2001:db8:104::1 peer 2001:db8:104::3 metric 261"
+ set +e
+
+ check_route6 "2001:db8:104::1 dev dummy2 proto kernel metric 261"
+ log_test $? 0 "Modify metric and peer address on local side"
+ check_route6 "2001:db8:104::3 dev dummy2 proto kernel metric 261"
+ log_test $? 0 "Modify metric and peer address on peer side"
+
$IP li del dummy1
$IP li del dummy2
cleanup
@@ -1320,13 +1341,20 @@ ipv4_addr_metric_test()

run_cmd "$IP addr flush dev dummy2"
run_cmd "$IP addr add dev dummy2 172.16.104.1/32 peer 172.16.104.2 metric 260"
- run_cmd "$IP addr change dev dummy2 172.16.104.1/32 peer 172.16.104.2 metric 261"
rc=$?
if [ $rc -eq 0 ]; then
- check_route "172.16.104.2 dev dummy2 proto kernel scope link src 172.16.104.1 metric 261"
+ check_route "172.16.104.2 dev dummy2 proto kernel scope link src 172.16.104.1 metric 260"
+ rc=$?
+ fi
+ log_test $rc 0 "Set metric of address with peer route"
+
+ run_cmd "$IP addr change dev dummy2 172.16.104.1/32 peer 172.16.104.3 metric 261"
+ rc=$?
+ if [ $rc -eq 0 ]; then
+ check_route "172.16.104.3 dev dummy2 proto kernel scope link src 172.16.104.1 metric 261"
rc=$?
fi
- log_test $rc 0 "Modify metric of address with peer route"
+ log_test $rc 0 "Modify metric and peer address for peer route"

$IP li del dummy1
$IP li del dummy2
Greg Kroah-Hartman
2020-03-17 10:55:18 UTC
Permalink
From: Yonghyun Hwang <***@google.com>

commit 77a1bce84bba01f3f143d77127b72e872b573795 upstream.

intel_iommu_iova_to_phys() has a bug when it translates an IOVA for a huge
page onto its corresponding physical address. This commit fixes the bug by
accomodating the level of page entry for the IOVA and adds IOVA's lower
address to the physical address.

Cc: <***@vger.kernel.org>
Acked-by: Lu Baolu <***@linux.intel.com>
Reviewed-by: Moritz Fischer <***@kernel.org>
Signed-off-by: Yonghyun Hwang <***@google.com>
Fixes: 3871794642579 ("VT-d: Changes to support KVM")
Signed-off-by: Joerg Roedel <***@suse.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/intel-iommu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5144,8 +5144,10 @@ static phys_addr_t intel_iommu_iova_to_p
u64 phys = 0;

pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level);
- if (pte)
- phys = dma_pte_addr(pte);
+ if (pte && dma_pte_present(pte))
+ phys = dma_pte_addr(pte) +
+ (iova & (BIT_MASK(level_to_offset_bits(level) +
+ VTD_PAGE_SHIFT) - 1));

return phys;
}
Greg Kroah-Hartman
2020-03-17 10:55:28 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit c049b3450072b8e3998053490e025839fecfef31 upstream.

Add missing attribute validation for cthelper
to the netlink policy.

Fixes: 12f7a505331e ("netfilter: add user-space connection tracking helper infrastructure")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/nfnetlink_cthelper.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -744,6 +744,8 @@ static const struct nla_policy nfnl_cthe
[NFCTH_NAME] = { .type = NLA_NUL_STRING,
.len = NF_CT_HELPER_NAME_LEN-1 },
[NFCTH_QUEUE_NUM] = { .type = NLA_U32, },
+ [NFCTH_PRIV_DATA_LEN] = { .type = NLA_U32, },
+ [NFCTH_STATUS] = { .type = NLA_U32, },
};

static const struct nfnl_callback nfnl_cthelper_cb[NFNL_MSG_CTHELPER_MAX] = {
Greg Kroah-Hartman
2020-03-17 10:55:30 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit 88a637719a1570705c02cacb3297af164b1714e7 upstream.

Add missing attribute validation for tunnel source and
destination ports to the netlink policy.

Fixes: af308b94a2a4 ("netfilter: nf_tables: add tunnel support")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/nft_tunnel.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -308,6 +308,8 @@ static const struct nla_policy nft_tunne
[NFTA_TUNNEL_KEY_FLAGS] = { .type = NLA_U32, },
[NFTA_TUNNEL_KEY_TOS] = { .type = NLA_U8, },
[NFTA_TUNNEL_KEY_TTL] = { .type = NLA_U8, },
+ [NFTA_TUNNEL_KEY_SPORT] = { .type = NLA_U16, },
+ [NFTA_TUNNEL_KEY_DPORT] = { .type = NLA_U16, },
[NFTA_TUNNEL_KEY_OPTS] = { .type = NLA_NESTED, },
};
Greg Kroah-Hartman
2020-03-17 10:55:29 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit 9d6effb2f1523eb84516e44213c00f2fd9e6afff upstream.

Add missing attribute validation for NFTA_PAYLOAD_CSUM_FLAGS
to the netlink policy.

Fixes: 1814096980bb ("netfilter: nft_payload: layer 4 checksum adjustment for pseudoheader fields")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: Pablo Neira Ayuso <***@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/netfilter/nft_payload.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -121,6 +121,7 @@ static const struct nla_policy nft_paylo
[NFTA_PAYLOAD_LEN] = { .type = NLA_U32 },
[NFTA_PAYLOAD_CSUM_TYPE] = { .type = NLA_U32 },
[NFTA_PAYLOAD_CSUM_OFFSET] = { .type = NLA_U32 },
+ [NFTA_PAYLOAD_CSUM_FLAGS] = { .type = NLA_U32 },
};

static int nft_payload_init(const struct nft_ctx *ctx,
Greg Kroah-Hartman
2020-03-17 10:55:31 UTC
Permalink
From: Zhenzhong Duan <***@gmail.com>

commit b0bb0c22c4db623f2e7b1a471596fbf1c22c6dc5 upstream.

When base address in RHSA structure doesn't match base address in
each DRHD structure, the base address in last DRHD is printed out.

This doesn't make sense when there are multiple DRHD units, fix it
by printing the buggy RHSA's base address.

Signed-off-by: Lu Baolu <***@linux.intel.com>
Signed-off-by: Zhenzhong Duan <***@gmail.com>
Fixes: fd0c8894893cb ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Signed-off-by: Joerg Roedel <***@suse.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/dmar.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -486,7 +486,7 @@ static int dmar_parse_one_rhsa(struct ac
pr_warn(FW_BUG
"Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
- drhd->reg_base_addr,
+ rhsa->base_address,
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
Greg Kroah-Hartman
2020-03-17 10:55:32 UTC
Permalink
From: Daniel Drake <***@endlessm.com>

commit da72a379b2ec0bad3eb265787f7008bead0b040c upstream.

VMD subdevices are created with a PCI domain ID of 0x10000 or
higher.

These subdevices are also handled like all other PCI devices by
dmar_pci_bus_notifier().

However, when dmar_alloc_pci_notify_info() take records of such devices,
it will truncate the domain ID to a u16 value (in info->seg).
The device at (e.g.) 10000:00:02.0 is then treated by the DMAR code as if
it is 0000:00:02.0.

In the unlucky event that a real device also exists at 0000:00:02.0 and
also has a device-specific entry in the DMAR table,
dmar_insert_dev_scope() will crash on:
  BUG_ON(i >= devices_cnt);

That's basically a sanity check that only one PCI device matches a
single DMAR entry; in this case we seem to have two matching devices.

Fix this by ignoring devices that have a domain number higher than
what can be looked up in the DMAR table.

This problem was carefully diagnosed by Jian-Hong Pan.

Signed-off-by: Lu Baolu <***@linux.intel.com>
Signed-off-by: Daniel Drake <***@endlessm.com>
Fixes: 59ce0515cdaf3 ("iommu/vt-d: Update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens")
Signed-off-by: Joerg Roedel <***@suse.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/dmar.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -39,6 +39,7 @@
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/iommu.h>
+#include <linux/limits.h>
#include <asm/irq_remapping.h>
#include <asm/iommu_table.h>

@@ -139,6 +140,13 @@ dmar_alloc_pci_notify_info(struct pci_de

BUG_ON(dev->is_virtfn);

+ /*
+ * Ignore devices that have a domain number higher than what can
+ * be looked up in DMAR, e.g. VMD subdevices with domain 0x10000
+ */
+ if (pci_domain_nr(dev->bus) > U16_MAX)
+ return NULL;
+
/* Only generate path[] for device addition event */
if (event == BUS_NOTIFY_ADD_DEVICE)
for (tmp = dev; tmp; tmp = tmp->bus->self)
Greg Kroah-Hartman
2020-03-17 10:55:35 UTC
Permalink
From: Karsten Graul <***@linux.ibm.com>

commit a2f2ef4a54c0d97aa6a8386f4ff23f36ebb488cf upstream.

In smc_ib_remove_dev() check if the provided ib device was actually
initialized for SMC before.

Reported-by: syzbot+***@syzkaller.appspotmail.com
Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client")
Signed-off-by: Karsten Graul <***@linux.ibm.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/smc/smc_ib.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -552,6 +552,8 @@ static void smc_ib_remove_dev(struct ib_
struct smc_ib_device *smcibdev;

smcibdev = ib_get_client_data(ibdev, &smc_ib_client);
+ if (!smcibdev || smcibdev->ibdev != ibdev)
+ return;
ib_set_client_data(ibdev, &smc_ib_client, NULL);
spin_lock(&smc_ib_devices.lock);
list_del_init(&smcibdev->list); /* remove from smc_ib_devices */
Greg Kroah-Hartman
2020-03-17 10:55:36 UTC
Permalink
From: Karsten Graul <***@linux.ibm.com>

commit ece0d7bd74615773268475b6b64d6f1ebbd4b4c6 upstream.

During IB device removal, cancel the event worker before the device
structure is freed.

Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client")
Reported-by: syzbot+***@syzkaller.appspotmail.com
Signed-off-by: Karsten Graul <***@linux.ibm.com>
Reviewed-by: Ursula Braun <***@linux.ibm.com>
Reviewed-by: Leon Romanovsky <***@mellanox.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/smc/smc_ib.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -561,6 +561,7 @@ static void smc_ib_remove_dev(struct ib_
smc_pnet_remove_by_ibdev(smcibdev);
smc_ib_cleanup_per_ibdev(smcibdev);
ib_unregister_event_handler(&smcibdev->event_handler);
+ cancel_work_sync(&smcibdev->port_event_work);
kfree(smcibdev);
}
Greg Kroah-Hartman
2020-03-17 10:55:34 UTC
Permalink
From: Eric Dumazet <***@google.com>

commit b6f6118901d1e867ac9177bbff3b00b185bd4fdc upstream.

IPV6_ADDRFORM is able to transform IPv6 socket to IPv4 one.
While this operation sounds illogical, we have to support it.

One of the things it does for TCP socket is to switch sk->sk_prot
to tcp_prot.

We now have other layers playing with sk->sk_prot, so we should make
sure to not interfere with them.

This patch makes sure sk_prot is the default pointer for TCP IPv6 socket.

syzbot reported :
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD a0113067 P4D a0113067 PUD a8771067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10686 Comm: syz-executor.0 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
inet_release+0x165/0x1c0 net/ipv4/af_inet.c:427
__sock_release net/socket.c:605 [inline]
sock_close+0xe1/0x260 net/socket.c:1283
__fput+0x2e4/0x740 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:313
task_work_run+0x176/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195
syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2ae75dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007f2ae75db6d4 RCX: 000000000045c429
RDX: 0000000000000001 RSI: 000000000000011a RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000038 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a9d R14: 00000000004ccfb4 R15: 000000000076bf2c
Modules linked in:
CR2: 0000000000000000
---[ end trace 82567b5207e87bae ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Eric Dumazet <***@google.com>
Reported-by: syzbot+***@syzkaller.appspotmail.com
Cc: Daniel Borkmann <***@iogearbox.net>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/ipv6/ipv6_sockglue.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -185,9 +185,15 @@ static int do_ipv6_setsockopt(struct soc
retv = -EBUSY;
break;
}
- } else if (sk->sk_protocol != IPPROTO_TCP)
+ } else if (sk->sk_protocol == IPPROTO_TCP) {
+ if (sk->sk_prot != &tcpv6_prot) {
+ retv = -EBUSY;
+ break;
+ }
+ break;
+ } else {
break;
-
+ }
if (sk->sk_state != TCP_ESTABLISHED) {
retv = -ENOTCONN;
break;
Greg Kroah-Hartman
2020-03-17 10:55:19 UTC
Permalink
From: Sven Eckelmann <***@narfation.org>

commit 8e8ce08198de193e3d21d42e96945216e3d9ac7f upstream.

A transmission scheduling for an interface which is currently dropped by
batadv_iv_ogm_iface_disable could still be in progress. The B.A.T.M.A.N. V
is simply cancelling the workqueue item in an synchronous way but this is
not possible with B.A.T.M.A.N. IV because the OGM submissions are
intertwined.

Instead it has to stop submitting the OGM when it detect that the buffer
pointer is set to NULL.

Reported-by: syzbot+***@syzkaller.appspotmail.com
Reported-by: syzbot+***@syzkaller.appspotmail.com
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <***@narfation.org>
Cc: Hillf Danton <***@sina.com>
Signed-off-by: Simon Wunderlich <***@simonwunderlich.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/batman-adv/bat_iv_ogm.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -970,6 +970,10 @@ static void batadv_iv_ogm_schedule_buff(

lockdep_assert_held(&hard_iface->bat_iv.ogm_buff_mutex);

+ /* interface already disabled by batadv_iv_ogm_iface_disable */
+ if (!*ogm_buff)
+ return;
+
/* the interface gets activated here to avoid race conditions between
* the moment of activating the interface in
* hardif_activate_interface() where the originator mac is set and
Greg Kroah-Hartman
2020-03-17 10:55:38 UTC
Permalink
From: Sven Eckelmann <***@narfation.org>

commit a8d23cbbf6c9f515ed678204ad2962be7c336344 upstream.

A B.A.T.M.A.N. V virtual interface has an OGM2 packet buffer which is
initialized using data from the netdevice notifier and other rtnetlink
related hooks. It is sent regularly via various slave interfaces of the
batadv virtual interface and in this process also modified (realloced) to
integrate additional state information via TVLV containers.

It must be avoided that the worker item is executed without a common lock
with the netdevice notifier/rtnetlink helpers. Otherwise it can either
happen that half modified data is sent out or the functions modifying the
OGM2 buffer try to access already freed memory regions.

Fixes: 0da0035942d4 ("batman-adv: OGMv2 - add basic infrastructure")
Signed-off-by: Sven Eckelmann <***@narfation.org>
Signed-off-by: Simon Wunderlich <***@simonwunderlich.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/batman-adv/bat_v_ogm.c | 42 ++++++++++++++++++++++++++++++++++--------
net/batman-adv/types.h | 4 ++++
2 files changed, 38 insertions(+), 8 deletions(-)

--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c
@@ -29,6 +29,8 @@
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
+#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/random.h>
#include <linux/rculist.h>
@@ -128,14 +130,12 @@ static void batadv_v_ogm_send_to_if(stru
}

/**
- * batadv_v_ogm_send() - periodic worker broadcasting the own OGM
- * @work: work queue item
+ * batadv_v_ogm_send_softif() - periodic worker broadcasting the own OGM
+ * @bat_priv: the bat priv with all the soft interface information
*/
-static void batadv_v_ogm_send(struct work_struct *work)
+static void batadv_v_ogm_send_softif(struct batadv_priv *bat_priv)
{
struct batadv_hard_iface *hard_iface;
- struct batadv_priv_bat_v *bat_v;
- struct batadv_priv *bat_priv;
struct batadv_ogm2_packet *ogm_packet;
struct sk_buff *skb, *skb_tmp;
unsigned char *ogm_buff;
@@ -143,8 +143,7 @@ static void batadv_v_ogm_send(struct wor
u16 tvlv_len = 0;
int ret;

- bat_v = container_of(work, struct batadv_priv_bat_v, ogm_wq.work);
- bat_priv = container_of(bat_v, struct batadv_priv, bat_v);
+ lockdep_assert_held(&bat_priv->bat_v.ogm_buff_mutex);

if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING)
goto out;
@@ -236,6 +235,23 @@ out:
}

/**
+ * batadv_v_ogm_send() - periodic worker broadcasting the own OGM
+ * @work: work queue item
+ */
+static void batadv_v_ogm_send(struct work_struct *work)
+{
+ struct batadv_priv_bat_v *bat_v;
+ struct batadv_priv *bat_priv;
+
+ bat_v = container_of(work, struct batadv_priv_bat_v, ogm_wq.work);
+ bat_priv = container_of(bat_v, struct batadv_priv, bat_v);
+
+ mutex_lock(&bat_priv->bat_v.ogm_buff_mutex);
+ batadv_v_ogm_send_softif(bat_priv);
+ mutex_unlock(&bat_priv->bat_v.ogm_buff_mutex);
+}
+
+/**
* batadv_v_ogm_iface_enable() - prepare an interface for B.A.T.M.A.N. V
* @hard_iface: the interface to prepare
*
@@ -261,11 +277,15 @@ void batadv_v_ogm_primary_iface_set(stru
struct batadv_priv *bat_priv = netdev_priv(primary_iface->soft_iface);
struct batadv_ogm2_packet *ogm_packet;

+ mutex_lock(&bat_priv->bat_v.ogm_buff_mutex);
if (!bat_priv->bat_v.ogm_buff)
- return;
+ goto unlock;

ogm_packet = (struct batadv_ogm2_packet *)bat_priv->bat_v.ogm_buff;
ether_addr_copy(ogm_packet->orig, primary_iface->net_dev->dev_addr);
+
+unlock:
+ mutex_unlock(&bat_priv->bat_v.ogm_buff_mutex);
}

/**
@@ -887,6 +907,8 @@ int batadv_v_ogm_init(struct batadv_priv
atomic_set(&bat_priv->bat_v.ogm_seqno, random_seqno);
INIT_DELAYED_WORK(&bat_priv->bat_v.ogm_wq, batadv_v_ogm_send);

+ mutex_init(&bat_priv->bat_v.ogm_buff_mutex);
+
return 0;
}

@@ -898,7 +920,11 @@ void batadv_v_ogm_free(struct batadv_pri
{
cancel_delayed_work_sync(&bat_priv->bat_v.ogm_wq);

+ mutex_lock(&bat_priv->bat_v.ogm_buff_mutex);
+
kfree(bat_priv->bat_v.ogm_buff);
bat_priv->bat_v.ogm_buff = NULL;
bat_priv->bat_v.ogm_buff_len = 0;
+
+ mutex_unlock(&bat_priv->bat_v.ogm_buff_mutex);
}
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -28,6 +28,7 @@
#include <linux/compiler.h>
#include <linux/if_ether.h>
#include <linux/kref.h>
+#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/sched.h> /* for linux/wait.h */
@@ -1493,6 +1494,9 @@ struct batadv_priv_bat_v {
/** @ogm_seqno: OGM sequence number - used to identify each OGM */
atomic_t ogm_seqno;

+ /** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */
+ struct mutex ogm_buff_mutex;
+
/** @ogm_wq: workqueue used to schedule OGM transmissions */
struct delayed_work ogm_wq;
};
Greg Kroah-Hartman
2020-03-17 10:55:37 UTC
Permalink
From: Vladis Dronov <***@redhat.com>

commit d6c066fda90d578aacdf19771a027ed484a79825 upstream.

Add a sanity check to efivar_store_raw() the same way
efivar_{attr,size,data}_read() and efivar_show_raw() have it.

Signed-off-by: Vladis Dronov <***@redhat.com>
Signed-off-by: Ard Biesheuvel <***@kernel.org>
Signed-off-by: Ingo Molnar <***@kernel.org>
Cc: <***@vger.kernel.org>
Link: https://lore.kernel.org/r/20200305084041.24053-3-***@redhat.com
Link: https://lore.kernel.org/r/20200308080859.21568-25-***@kernel.org
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>


---
drivers/firmware/efi/efivars.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -272,6 +272,9 @@ efivar_store_raw(struct efivar_entry *en
u8 *data;
int err;

+ if (!entry || !buf)
+ return -EINVAL;
+
if (is_compat()) {
struct compat_efi_variable *compat;
Greg Kroah-Hartman
2020-03-17 10:55:24 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit 0e1a1d853ecedc99da9d27f9f5c376935547a0e2 upstream.

Add missing attribute validation for critical protocol fields
to the netlink policy.

Fixes: 5de17984898c ("cfg80211: introduce critical protocol indication from user-space")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Link: https://lore.kernel.org/r/20200303051058.4089398-2-***@kernel.org
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/wireless/nl80211.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -397,6 +397,8 @@ static const struct nla_policy nl80211_p
[NL80211_ATTR_MDID] = { .type = NLA_U16 },
[NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
+ [NL80211_ATTR_CRIT_PROT_ID] = { .type = NLA_U16 },
+ [NL80211_ATTR_MAX_CRIT_PROT_DURATION] = { .type = NLA_U16 },
[NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
[NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
[NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
Greg Kroah-Hartman
2020-03-17 10:55:22 UTC
Permalink
From: Zhenyu Wang <***@linux.intel.com>

commit 04d6067f1f19e70a418f92fa3170cf7fe53b7fdf upstream.
From commit f25a49ab8ab9 ("drm/i915/gvt: Use vgpu_lock to protect per
vgpu access") the vgpu idr destroy is moved later than vgpu resource
destroy, then it would fail to stop timer for schedule policy clean
which to check vgpu idr for any left vGPU. So this trys to destroy
vgpu idr earlier.

Cc: Colin Xu <***@intel.com>
Fixes: f25a49ab8ab9 ("drm/i915/gvt: Use vgpu_lock to protect per vgpu access")
Acked-by: Colin Xu <***@intel.com>
Signed-off-by: Zhenyu Wang <***@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200229055445.31481-1-***@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/gpu/drm/i915/gvt/vgpu.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -272,10 +272,17 @@ void intel_gvt_destroy_vgpu(struct intel
{
struct intel_gvt *gvt = vgpu->gvt;

- mutex_lock(&vgpu->vgpu_lock);
-
WARN(vgpu->active, "vGPU is still active!\n");

+ /*
+ * remove idr first so later clean can judge if need to stop
+ * service if no active vgpu.
+ */
+ mutex_lock(&gvt->lock);
+ idr_remove(&gvt->vgpu_idr, vgpu->id);
+ mutex_unlock(&gvt->lock);
+
+ mutex_lock(&vgpu->vgpu_lock);
intel_gvt_debugfs_remove_vgpu(vgpu);
intel_vgpu_clean_sched_policy(vgpu);
intel_vgpu_clean_submission(vgpu);
@@ -290,7 +297,6 @@ void intel_gvt_destroy_vgpu(struct intel
mutex_unlock(&vgpu->vgpu_lock);

mutex_lock(&gvt->lock);
- idr_remove(&gvt->vgpu_idr, vgpu->id);
if (idr_is_empty(&gvt->vgpu_idr))
intel_gvt_clean_irq(gvt);
intel_gvt_update_vgpu_types(gvt);
Greg Kroah-Hartman
2020-03-17 10:55:26 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit 5cde05c61cbe13cbb3fa66d52b9ae84f7975e5e6 upstream.

Add missing attribute validation for NL80211_ATTR_OPER_CLASS
to the netlink policy.

Fixes: 1057d35ede5d ("cfg80211: introduce TDLS channel switch commands")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Link: https://lore.kernel.org/r/20200303051058.4089398-4-***@kernel.org
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/wireless/nl80211.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -426,6 +426,7 @@ static const struct nla_policy nl80211_p
[NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
[NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
[NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
+ [NL80211_ATTR_OPER_CLASS] = { .type = NLA_U8 },
[NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
[NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
[NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
Greg Kroah-Hartman
2020-03-17 10:55:25 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

commit 056e9375e1f3c4bf2fd49b70258c7daf788ecd9d upstream.

Add missing attribute validation for beacon report scanning
to the netlink policy.

Fixes: 1d76250bd34a ("nl80211: support beacon report scanning")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Link: https://lore.kernel.org/r/20200303051058.4089398-3-***@kernel.org
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
net/wireless/nl80211.c | 2 ++
1 file changed, 2 insertions(+)

--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -349,6 +349,8 @@ static const struct nla_policy nl80211_p
[NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
[NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
[NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
+ [NL80211_ATTR_MEASUREMENT_DURATION] = { .type = NLA_U16 },
+ [NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY] = { .type = NLA_FLAG },
[NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
[NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
[NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
Greg Kroah-Hartman
2020-03-17 10:55:17 UTC
Permalink
From: Hans de Goede <***@redhat.com>

commit 59833696442c674acbbd297772ba89e7ad8c753d upstream.

Quoting from the comment describing the WARN functions in
include/asm-generic/bug.h:

* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant kernel issues that need prompt attention if they should ever
* appear at runtime.
*
* Do not use these macros when checking for invalid external inputs

The (buggy) firmware tables which the dmar code was calling WARN_TAINT
for really are invalid external inputs. They are not under the kernel's
control and the issues in them cannot be fixed by a kernel update.
So logging a backtrace, which invites bug reports to be filed about this,
is not helpful.

Some distros, e.g. Fedora, have tools watching for the kernel backtraces
logged by the WARN macros and offer the user an option to file a bug for
this when these are encountered. The WARN_TAINT in warn_invalid_dmar()
+ another iommu WARN_TAINT, addressed in another patch, have lead to over
a 100 bugs being filed this way.

This commit replaces the WARN_TAINT("...") calls, with
pr_warn(FW_BUG "...") + add_taint(TAINT_FIRMWARE_WORKAROUND, ...) calls
avoiding the backtrace and thus also avoiding bug-reports being filed
about this against the kernel.

Fixes: fd0c8894893c ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Fixes: e625b4a95d50 ("iommu/vt-d: Parse ANDD records")
Signed-off-by: Hans de Goede <***@redhat.com>
Signed-off-by: Joerg Roedel <***@suse.de>
Acked-by: Lu Baolu <***@linux.intel.com>
Cc: ***@vger.kernel.org
Link: https://lore.kernel.org/r/20200309140138.3753-2-***@redhat.com
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1564895
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/iommu/dmar.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -451,12 +451,13 @@ static int __init dmar_parse_one_andd(st

/* Check for NUL termination within the designated length */
if (strnlen(andd->device_name, header->length - 8) == header->length - 8) {
- WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
+ pr_warn(FW_BUG
"Your BIOS is broken; ANDD object name is not NUL-terminated\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
return -EINVAL;
}
pr_info("ANDD device: %x name: %s\n", andd->device_number,
@@ -482,14 +483,14 @@ static int dmar_parse_one_rhsa(struct ac
return 0;
}
}
- WARN_TAINT(
- 1, TAINT_FIRMWARE_WORKAROUND,
+ pr_warn(FW_BUG
"Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
drhd->reg_base_addr,
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);

return 0;
}
@@ -838,14 +839,14 @@ int __init dmar_table_init(void)

static void warn_invalid_dmar(u64 addr, const char *message)
{
- WARN_TAINT_ONCE(
- 1, TAINT_FIRMWARE_WORKAROUND,
+ pr_warn_once(FW_BUG
"Your BIOS is broken; DMAR reported at address %llx%s!\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
addr, message,
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
}

static int __ref
Greg Kroah-Hartman
2020-03-17 10:55:21 UTC
Permalink
From: Charles Keepax <***@opensource.cirrus.com>

commit aafd56fc79041bf36f97712d4b35208cbe07db90 upstream.

kref_init starts with the reference count at 1, which will be balanced
by the pinctrl_put in pinctrl_unregister. The additional kref_get in
pinctrl_claim_hogs will increase this count to 2 and cause the hogs to
not get freed when pinctrl_unregister is called.

Fixes: 6118714275f0 ("pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable()")
Signed-off-by: Charles Keepax <***@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200228154142.13860-1-***@opensource.cirrus.com
Signed-off-by: Linus Walleij <***@linaro.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/pinctrl/core.c | 1 -
1 file changed, 1 deletion(-)

--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -2008,7 +2008,6 @@ static int pinctrl_claim_hogs(struct pin
return PTR_ERR(pctldev->p);
}

- kref_get(&pctldev->p->users);
pctldev->hog_default =
pinctrl_lookup_state(pctldev->p, PINCTRL_STATE_DEFAULT);
if (IS_ERR(pctldev->hog_default)) {
Greg Kroah-Hartman
2020-03-17 10:55:23 UTC
Permalink
From: Hamish Martin <***@alliedtelesis.co.nz>

commit 3747cd2efe7ecb9604972285ab3f60c96cb753a8 upstream.

If a GPIO we are trying to use is not available and we are deferring
the probe, don't output an error message.
This seems to have been the intent of commit 05c74778858d
("i2c: gpio: Add support for named gpios in DT") but the error was
still output due to not checking the updated 'retdesc'.

Fixes: 05c74778858d ("i2c: gpio: Add support for named gpios in DT")
Signed-off-by: Hamish Martin <***@alliedtelesis.co.nz>
Acked-by: Linus Walleij <***@linaro.org>
Signed-off-by: Wolfram Sang <***@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/i2c/busses/i2c-gpio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -248,7 +248,7 @@ static struct gpio_desc *i2c_gpio_get_de
if (ret == -ENOENT)
retdesc = ERR_PTR(-EPROBE_DEFER);

- if (ret != -EPROBE_DEFER)
+ if (PTR_ERR(retdesc) != -EPROBE_DEFER)
dev_err(dev, "error trying to get descriptor: %d\n", ret);

return retdesc;
Greg Kroah-Hartman
2020-03-17 10:55:20 UTC
Permalink
From: Nicolas Belin <***@baylibre.com>

commit dc7a06b0dbbafac8623c2b7657e61362f2f479a7 upstream.

In the gxl driver, the sdio cmd and clk pins are inverted. It has not caused
any issue so far because devices using these pins always take both pins
so the resulting configuration is OK.

Fixes: 0f15f500ff2c ("pinctrl: meson: Add GXL pinctrl definitions")
Reviewed-by: Jerome Brunet <***@baylibre.com>
Signed-off-by: Nicolas Belin <***@baylibre.com>
Link: https://lore.kernel.org/r/1582204512-7582-1-git-send-email-***@baylibre.com
Signed-off-by: Linus Walleij <***@linaro.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/pinctrl/meson/pinctrl-meson-gxl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
@@ -153,8 +153,8 @@ static const unsigned int sdio_d0_pins[]
static const unsigned int sdio_d1_pins[] = { GPIOX_1 };
static const unsigned int sdio_d2_pins[] = { GPIOX_2 };
static const unsigned int sdio_d3_pins[] = { GPIOX_3 };
-static const unsigned int sdio_cmd_pins[] = { GPIOX_4 };
-static const unsigned int sdio_clk_pins[] = { GPIOX_5 };
+static const unsigned int sdio_clk_pins[] = { GPIOX_4 };
+static const unsigned int sdio_cmd_pins[] = { GPIOX_5 };
static const unsigned int sdio_irq_pins[] = { GPIOX_7 };

static const unsigned int nand_ce0_pins[] = { BOOT_8 };
Greg Kroah-Hartman
2020-03-17 10:55:33 UTC
Permalink
From: Wolfram Sang <wsa+***@sang-engineering.com>

commit 8daee952b4389729358665fb91949460641659d4 upstream.

i2c_verify_client() can fail, so we need to put the device when that
happens.

Fixes: 525e6fabeae2 ("i2c / ACPI: add support for ACPI reconfigure notifications")
Reported-by: Geert Uytterhoeven <geert+***@glider.be>
Signed-off-by: Wolfram Sang <wsa+***@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+***@glider.be>
Reviewed-by: Andy Shevchenko <***@linux.intel.com>
Acked-by: Mika Westerberg <***@linux.intel.com>
Signed-off-by: Wolfram Sang <***@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/i2c/i2c-core-acpi.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -352,10 +352,18 @@ static struct i2c_adapter *i2c_acpi_find
static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev)
{
struct device *dev;
+ struct i2c_client *client;

dev = bus_find_device(&i2c_bus_type, NULL, adev,
i2c_acpi_find_match_device);
- return dev ? i2c_verify_client(dev) : NULL;
+ if (!dev)
+ return NULL;
+
+ client = i2c_verify_client(dev);
+ if (!client)
+ put_device(dev);
+
+ return client;
}

static int i2c_acpi_notify(struct notifier_block *nb, unsigned long value,
Greg Kroah-Hartman
2020-03-17 10:54:37 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit ab02ad660586b94f5d08912a3952b939cf4c4430 ]

Add missing attribute validation for IFLA_CAN_TERMINATION
to the netlink policy.

Fixes: 12a6075cabc0 ("can: dev: add CAN interface termination API")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Acked-by: Oliver Hartkopp <***@hartkopp.net>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/can/dev.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -892,6 +892,7 @@ static const struct nla_policy can_polic
= { .len = sizeof(struct can_bittiming) },
[IFLA_CAN_DATA_BITTIMING_CONST]
= { .len = sizeof(struct can_bittiming_const) },
+ [IFLA_CAN_TERMINATION] = { .type = NLA_U16 },
};

static int can_validate(struct nlattr *tb[], struct nlattr *data[],
Greg Kroah-Hartman
2020-03-17 10:54:43 UTC
Permalink
From: Jakub Kicinski <***@kernel.org>

[ Upstream commit 88e706d5168b07df4792dbc3d1bc37b83e4bd74d ]

Add missing attribute validation for NFC_ATTR_TARGET_INDEX
to the netlink policy.

Fixes: 4d63adfe12dd ("NFC: Add NFC_CMD_DEACTIVATE_TARGET support")
Signed-off-by: Jakub Kicinski <***@kernel.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
net/nfc/netlink.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -44,6 +44,7 @@ static const struct nla_policy nfc_genl_
[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
.len = NFC_DEVICE_NAME_MAXSIZE },
[NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
+ [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 },
[NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
[NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
Greg Kroah-Hartman
2020-03-17 10:55:10 UTC
Permalink
From: Eugeniy Paltsev <***@synopsys.com>

commit 8d92e992a785f35d23f845206cf8c6cafbc264e0 upstream.

The default defintions use fill pattern 0x90 for padding which for ARC
generates unintended "ldh_s r12,[r0,0x20]" corresponding to opcode 0x9090

So use ".align 4" which insert a "nop_s" instruction instead.

Cc: ***@vger.kernel.org
Acked-by: Vineet Gupta <***@synopsys.com>
Signed-off-by: Eugeniy Paltsev <***@synopsys.com>
Signed-off-by: Vineet Gupta <***@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
arch/arc/include/asm/linkage.h | 2 ++
1 file changed, 2 insertions(+)

--- a/arch/arc/include/asm/linkage.h
+++ b/arch/arc/include/asm/linkage.h
@@ -14,6 +14,8 @@
#ifdef __ASSEMBLY__

#define ASM_NL ` /* use '`' to mark new line in macro */
+#define __ALIGN .align 4
+#define __ALIGN_STR __stringify(__ALIGN)

/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_DATA nm
Greg Kroah-Hartman
2020-03-17 10:55:05 UTC
Permalink
From: Colin Ian King <***@canonical.com>

commit d785476c608c621b345dd9396e8b21e90375cb0e upstream.

Variable grph_obj_type is being assigned twice, one of these is
redundant so remove it.

Addresses-Coverity: ("Evaluation order violation")
Signed-off-by: Colin Ian King <***@canonical.com>
Signed-off-by: Alex Deucher <***@amd.com>
Cc: <***@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -364,8 +364,7 @@ bool amdgpu_atombios_get_connector_info_
router.ddc_valid = false;
router.cd_valid = false;
for (j = 0; j < ((le16_to_cpu(path->usSize) - 8) / 2); j++) {
- uint8_t grph_obj_type=
- grph_obj_type =
+ uint8_t grph_obj_type =
(le16_to_cpu(path->usGraphicObjIds[j]) &
OBJECT_TYPE_MASK) >> OBJECT_TYPE_SHIFT;
Greg Kroah-Hartman
2020-03-17 10:55:04 UTC
Permalink
From: Hillf Danton <***@sina.com>

commit aa202f1f56960c60e7befaa0f49c72b8fa11b0a8 upstream.

wq_select_unbound_cpu() is designed for unbound workqueues only, but
it's wrongly called when using a bound workqueue too.

Fixing this ensures work queued to a bound workqueue with
cpu=WORK_CPU_UNBOUND always runs on the local CPU.

Before, that would happen only if wq_unbound_cpumask happened to include
it (likely almost always the case), or was empty, or we got lucky with
forced round-robin placement. So restricting
/sys/devices/virtual/workqueue/cpumask to a small subset of a machine's
CPUs would cause some bound work items to run unexpectedly there.

Fixes: ef557180447f ("workqueue: schedule WORK_CPU_UNBOUND work on wq_unbound_cpumask CPUs")
Cc: ***@vger.kernel.org # v4.5+
Signed-off-by: Hillf Danton <***@sina.com>
[dj: massage changelog]
Signed-off-by: Daniel Jordan <***@oracle.com>
Cc: Tejun Heo <***@kernel.org>
Cc: Lai Jiangshan <***@gmail.com>
Cc: linux-***@vger.kernel.org
Signed-off-by: Tejun Heo <***@kernel.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
kernel/workqueue.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1384,14 +1384,16 @@ static void __queue_work(int cpu, struct
WARN_ON_ONCE(!is_chained_work(wq)))
return;
retry:
- if (req_cpu == WORK_CPU_UNBOUND)
- cpu = wq_select_unbound_cpu(raw_smp_processor_id());
-
/* pwq which will be used unless @work is executing elsewhere */
- if (!(wq->flags & WQ_UNBOUND))
- pwq = per_cpu_ptr(wq->cpu_pwqs, cpu);
- else
+ if (wq->flags & WQ_UNBOUND) {
+ if (req_cpu == WORK_CPU_UNBOUND)
+ cpu = wq_select_unbound_cpu(raw_smp_processor_id());
pwq = unbound_pwq_by_node(wq, cpu_to_node(cpu));
+ } else {
+ if (req_cpu == WORK_CPU_UNBOUND)
+ cpu = raw_smp_processor_id();
+ pwq = per_cpu_ptr(wq->cpu_pwqs, cpu);
+ }

/*
* If @work was previously on a different pool, it might still be
Greg Kroah-Hartman
2020-03-17 10:54:56 UTC
Permalink
From: Michal Koutný <***@suse.com>

commit 9c974c77246460fa6a92c18554c3311c8c83c160 upstream.

PF_EXITING is set earlier than actual removal from css_set when a task
is exitting. This can confuse cgroup.procs readers who see no PF_EXITING
tasks, however, rmdir is checking against css_set membership so it can
transitionally fail with EBUSY.

Fix this by listing tasks that weren't unlinked from css_set active
lists.
It may happen that other users of the task iterator (without
CSS_TASK_ITER_PROCS) spot a PF_EXITING task before cgroup_exit(). This
is equal to the state before commit c03cd7738a83 ("cgroup: Include dying
leaders with live threads in PROCS iterations") but it may be reviewed
later.

Reported-by: Suren Baghdasaryan <***@google.com>
Fixes: c03cd7738a83 ("cgroup: Include dying leaders with live threads in PROCS iterations")
Signed-off-by: Michal Koutný <***@suse.com>
Signed-off-by: Tejun Heo <***@kernel.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
include/linux/cgroup.h | 1 +
kernel/cgroup/cgroup.c | 23 ++++++++++++++++-------
2 files changed, 17 insertions(+), 7 deletions(-)

--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -62,6 +62,7 @@ struct css_task_iter {
struct list_head *mg_tasks_head;
struct list_head *dying_tasks_head;

+ struct list_head *cur_tasks_head;
struct css_set *cur_cset;
struct css_set *cur_dcset;
struct task_struct *cur_task;
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4157,12 +4157,16 @@ static void css_task_iter_advance_css_se
}
} while (!css_set_populated(cset) && list_empty(&cset->dying_tasks));

- if (!list_empty(&cset->tasks))
+ if (!list_empty(&cset->tasks)) {
it->task_pos = cset->tasks.next;
- else if (!list_empty(&cset->mg_tasks))
+ it->cur_tasks_head = &cset->tasks;
+ } else if (!list_empty(&cset->mg_tasks)) {
it->task_pos = cset->mg_tasks.next;
- else
+ it->cur_tasks_head = &cset->mg_tasks;
+ } else {
it->task_pos = cset->dying_tasks.next;
+ it->cur_tasks_head = &cset->dying_tasks;
+ }

it->tasks_head = &cset->tasks;
it->mg_tasks_head = &cset->mg_tasks;
@@ -4220,10 +4224,14 @@ repeat:
else
it->task_pos = it->task_pos->next;

- if (it->task_pos == it->tasks_head)
+ if (it->task_pos == it->tasks_head) {
it->task_pos = it->mg_tasks_head->next;
- if (it->task_pos == it->mg_tasks_head)
+ it->cur_tasks_head = it->mg_tasks_head;
+ }
+ if (it->task_pos == it->mg_tasks_head) {
it->task_pos = it->dying_tasks_head->next;
+ it->cur_tasks_head = it->dying_tasks_head;
+ }
if (it->task_pos == it->dying_tasks_head)
css_task_iter_advance_css_set(it);
} else {
@@ -4242,11 +4250,12 @@ repeat:
goto repeat;

/* and dying leaders w/o live member threads */
- if (!atomic_read(&task->signal->live))
+ if (it->cur_tasks_head == it->dying_tasks_head &&
+ !atomic_read(&task->signal->live))
goto repeat;
} else {
/* skip all dying ones */
- if (task->flags & PF_EXITING)
+ if (it->cur_tasks_head == it->dying_tasks_head)
goto repeat;
}
}
Greg Kroah-Hartman
2020-03-17 10:54:52 UTC
Permalink
From: Eric Dumazet <***@google.com>

[ Upstream commit 110a40dfb708fe940a3f3704d470e431c368d256 ]

Before accessing various fields in IPV4 network header
and TCP header, make sure the packet :

- Has IP version 4 (ip->version == 4)
- Has not a silly network length (ip->ihl >= 5)
- Is big enough to hold network and transport headers
- Has not a silly TCP header size (th->doff >= sizeof(struct tcphdr) / 4)

syzbot reported :

BUG: KMSAN: uninit-value in slhc_compress+0x5b9/0x2e60 drivers/net/slip/slhc.c:270
CPU: 0 PID: 11728 Comm: syz-executor231 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
slhc_compress+0x5b9/0x2e60 drivers/net/slip/slhc.c:270
ppp_send_frame drivers/net/ppp/ppp_generic.c:1637 [inline]
__ppp_xmit_process+0x1902/0x2970 drivers/net/ppp/ppp_generic.c:1495
ppp_xmit_process+0x147/0x2f0 drivers/net/ppp/ppp_generic.c:1516
ppp_write+0x6bb/0x790 drivers/net/ppp/ppp_generic.c:512
do_loop_readv_writev fs/read_write.c:717 [inline]
do_iter_write+0x812/0xdc0 fs/read_write.c:1000
compat_writev+0x2df/0x5a0 fs/read_write.c:1351
do_compat_pwritev64 fs/read_write.c:1400 [inline]
__do_compat_sys_pwritev fs/read_write.c:1420 [inline]
__se_compat_sys_pwritev fs/read_write.c:1414 [inline]
__ia32_compat_sys_pwritev+0x349/0x3f0 fs/read_write.c:1414
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f7cd99
Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffdb84ac EFLAGS: 00000217 ORIG_RAX: 000000000000014e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000040047459 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
ppp_write+0x115/0x790 drivers/net/ppp/ppp_generic.c:500
do_loop_readv_writev fs/read_write.c:717 [inline]
do_iter_write+0x812/0xdc0 fs/read_write.c:1000
compat_writev+0x2df/0x5a0 fs/read_write.c:1351
do_compat_pwritev64 fs/read_write.c:1400 [inline]
__do_compat_sys_pwritev fs/read_write.c:1420 [inline]
__se_compat_sys_pwritev fs/read_write.c:1414 [inline]
__ia32_compat_sys_pwritev+0x349/0x3f0 fs/read_write.c:1414
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139

Fixes: b5451d783ade ("slip: Move the SLIP drivers")
Signed-off-by: Eric Dumazet <***@google.com>
Reported-by: syzbot <***@googlegroups.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/slip/slhc.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/net/slip/slhc.c
+++ b/drivers/net/slip/slhc.c
@@ -232,7 +232,7 @@ slhc_compress(struct slcompress *comp, u
register struct cstate *cs = lcs->next;
register unsigned long deltaS, deltaA;
register short changes = 0;
- int hlen;
+ int nlen, hlen;
unsigned char new_seq[16];
register unsigned char *cp = new_seq;
struct iphdr *ip;
@@ -248,6 +248,8 @@ slhc_compress(struct slcompress *comp, u
return isize;

ip = (struct iphdr *) icp;
+ if (ip->version != 4 || ip->ihl < 5)
+ return isize;

/* Bail if this packet isn't TCP, or is an IP fragment */
if (ip->protocol != IPPROTO_TCP || (ntohs(ip->frag_off) & 0x3fff)) {
@@ -258,10 +260,14 @@ slhc_compress(struct slcompress *comp, u
comp->sls_o_tcp++;
return isize;
}
- /* Extract TCP header */
+ nlen = ip->ihl * 4;
+ if (isize < nlen + sizeof(*th))
+ return isize;

- th = (struct tcphdr *)(((unsigned char *)ip) + ip->ihl*4);
- hlen = ip->ihl*4 + th->doff*4;
+ th = (struct tcphdr *)(icp + nlen);
+ if (th->doff < sizeof(struct tcphdr) / 4)
+ return isize;
+ hlen = nlen + th->doff * 4;

/* Bail if the TCP packet isn't `compressible' (i.e., ACK isn't set or
* some other control bit is set). Also uncompressible if
Greg Kroah-Hartman
2020-03-17 10:54:18 UTC
Permalink
From: Eric Dumazet <***@google.com>

[ Upstream commit afe207d80a61e4d6e7cfa0611a4af46d0ba95628 ]

Commit e18b353f102e ("ipvlan: add cond_resched_rcu() while
processing muticast backlog") added a cond_resched_rcu() in a loop
using rcu protection to iterate over slaves.

This is breaking rcu rules, so lets instead use cond_resched()
at a point we can reschedule

Fixes: e18b353f102e ("ipvlan: add cond_resched_rcu() while processing muticast backlog")
Signed-off-by: Eric Dumazet <***@google.com>
Cc: Mahesh Bandewar <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ipvlan/ipvlan_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -282,7 +282,6 @@ void ipvlan_process_multicast(struct wor
}
ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true);
local_bh_enable();
- cond_resched_rcu();
}
rcu_read_unlock();

@@ -299,6 +298,7 @@ void ipvlan_process_multicast(struct wor
}
if (dev)
dev_put(dev);
+ cond_resched();
}
}
Greg Kroah-Hartman
2020-03-17 10:54:17 UTC
Permalink
From: Jiri Wiesner <***@suse.com>

[ Upstream commit 63aae7b17344d4b08a7d05cb07044de4c0f9dcc6 ]

There is a problem when ipvlan slaves are created on a master device that
is a vmxnet3 device (ipvlan in VMware guests). The vmxnet3 driver does not
support unicast address filtering. When an ipvlan device is brought up in
ipvlan_open(), the ipvlan driver calls dev_uc_add() to add the hardware
address of the vmxnet3 master device to the unicast address list of the
master device, phy_dev->uc. This inevitably leads to the vmxnet3 master
device being forced into promiscuous mode by __dev_set_rx_mode().

Promiscuous mode is switched on the master despite the fact that there is
still only one hardware address that the master device should use for
filtering in order for the ipvlan device to be able to receive packets.
The comment above struct net_device describes the uc_promisc member as a
"counter, that indicates, that promiscuous mode has been enabled due to
the need to listen to additional unicast addresses in a device that does
not implement ndo_set_rx_mode()". Moreover, the design of ipvlan
guarantees that only the hardware address of a master device,
phy_dev->dev_addr, will be used to transmit and receive all packets from
its ipvlan slaves. Thus, the unicast address list of the master device
should not be modified by ipvlan_open() and ipvlan_stop() in order to make
ipvlan a workable option on masters that do not support unicast address
filtering.

Fixes: 2ad7bf3638411 ("ipvlan: Initial check-in of the IPVLAN driver")
Reported-by: Per Sundstrom <***@redqube.se>
Signed-off-by: Jiri Wiesner <***@suse.com>
Reviewed-by: Eric Dumazet <***@google.com>
Acked-by: Mahesh Bandewar <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ipvlan/ipvlan_main.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -236,7 +236,6 @@ static void ipvlan_uninit(struct net_dev
static int ipvlan_open(struct net_device *dev)
{
struct ipvl_dev *ipvlan = netdev_priv(dev);
- struct net_device *phy_dev = ipvlan->phy_dev;
struct ipvl_addr *addr;

if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
@@ -250,7 +249,7 @@ static int ipvlan_open(struct net_device
ipvlan_ht_addr_add(ipvlan, addr);
rcu_read_unlock();

- return dev_uc_add(phy_dev, phy_dev->dev_addr);
+ return 0;
}

static int ipvlan_stop(struct net_device *dev)
@@ -262,8 +261,6 @@ static int ipvlan_stop(struct net_device
dev_uc_unsync(phy_dev, dev);
dev_mc_unsync(phy_dev, dev);

- dev_uc_del(phy_dev, phy_dev->dev_addr);
-
rcu_read_lock();
list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
ipvlan_ht_addr_del(addr);
Greg Kroah-Hartman
2020-03-17 10:54:26 UTC
Permalink
From: Colin Ian King <***@canonical.com>

[ Upstream commit c0368595c1639947839c0db8294ee96aca0b3b86 ]

Currently the bounds check on index is off by one and can lead to
an out of bounds access on array priv->filters_loc when index is
RXCHK_BRCM_TAG_MAX.

Fixes: bb9051a2b230 ("net: systemport: Add support for WAKE_FILTER")
Signed-off-by: Colin Ian King <***@canonical.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
drivers/net/ethernet/broadcom/bcmsysport.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2168,7 +2168,7 @@ static int bcm_sysport_rule_set(struct b
return -ENOSPC;

index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
- if (index > RXCHK_BRCM_TAG_MAX)
+ if (index >= RXCHK_BRCM_TAG_MAX)
return -ENOSPC;

/* Location is the classification ID, and index is the position
Greg Kroah-Hartman
2020-03-17 10:55:27 UTC
Permalink
From: Tommi Rantala <***@nokia.com>

commit f649bd9dd5d5004543bbc3c50b829577b49f5d75 upstream.

Since commit 3b2323c2c1c4 ("perf bench futex: Use cpumaps") the default
number of threads the benchmark uses got changed from number of online
CPUs to zero:

$ perf bench futex wake
# Running 'futex/wake' benchmark:
Run summary [PID 15930]: blocking on 0 threads (at [private] futex 0x558b8ee4bfac), waking up 1 at a time.
[Run 1]: Wokeup 0 of 0 threads in 0.0000 ms
[...]
[Run 10]: Wokeup 0 of 0 threads in 0.0000 ms
Wokeup 0 of 0 threads in 0.0004 ms (+-40.82%)

Restore the old behavior by grabbing the number of online CPUs via
cpu->nr:

$ perf bench futex wake
# Running 'futex/wake' benchmark:
Run summary [PID 18356]: blocking on 8 threads (at [private] futex 0xb3e62c), waking up 1 at a time.
[Run 1]: Wokeup 8 of 8 threads in 0.0260 ms
[...]
[Run 10]: Wokeup 8 of 8 threads in 0.0270 ms
Wokeup 8 of 8 threads in 0.0419 ms (+-24.35%)

Fixes: 3b2323c2c1c4 ("perf bench futex: Use cpumaps")
Signed-off-by: Tommi Rantala <***@nokia.com>
Tested-by: Arnaldo Carvalho de Melo <***@redhat.com>
Cc: Alexander Shishkin <***@linux.intel.com>
Cc: Darren Hart <***@infradead.org>
Cc: Davidlohr Bueso <***@stgolabs.net>
Cc: Jiri Olsa <***@redhat.com>
Cc: Mark Rutland <***@arm.com>
Cc: Namhyung Kim <***@kernel.org>
Cc: Peter Zijlstra <***@infradead.org>
Cc: Thomas Gleixner <***@linutronix.de>
Link: http://lore.kernel.org/lkml/20200305083714.9381-3-***@nokia.com
Signed-off-by: Arnaldo Carvalho de Melo <***@redhat.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
tools/perf/bench/futex-wake.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/perf/bench/futex-wake.c
+++ b/tools/perf/bench/futex-wake.c
@@ -42,7 +42,7 @@ static bool done = false, silent = false
static pthread_mutex_t thread_lock;
static pthread_cond_t thread_parent, thread_worker;
static struct stats waketime_stats, wakeup_stats;
-static unsigned int ncpus, threads_starting, nthreads = 0;
+static unsigned int threads_starting, nthreads = 0;
static int futex_flag = 0;

static const struct option options[] = {
@@ -140,7 +140,7 @@ int bench_futex_wake(int argc, const cha
sigaction(SIGINT, &act, NULL);

if (!nthreads)
- nthreads = ncpus;
+ nthreads = cpu->nr;

worker = calloc(nthreads, sizeof(*worker));
if (!worker)
Guenter Roeck
2020-03-17 20:16:10 UTC
Permalink
This is the start of the stable review cycle for the 4.19.111 release.
There are 89 patches in this series, all will be posted as a response
to this one. If anyone has any issues with these being applied, please
let me know.
Responses should be made by Thu, 19 Mar 2020 10:31:16 +0000.
Anything received after that time might be too late.
Build results:
total: 156 pass: 156 fail: 0
Qemu test results:
total: 418 pass: 418 fail: 0

Guenter
Naresh Kamboju
2020-03-17 20:26:30 UTC
Permalink
On Tue, 17 Mar 2020 at 16:27, Greg Kroah-Hartman
This is the start of the stable review cycle for the 4.19.111 release.
There are 89 patches in this series, all will be posted as a response
to this one. If anyone has any issues with these being applied, please
let me know.
Responses should be made by Thu, 19 Mar 2020 10:31:16 +0000.
Anything received after that time might be too late.
https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.111-rc1.gz
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.
thanks,
greg k-h
Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Summary
------------------------------------------------------------------------

kernel: 4.19.111-rc1
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git branch: linux-4.19.y
git commit: ad35ac79caefa8ec9fbaaf4737d87fd7bc0329cd
git describe: v4.19.110-90-gad35ac79caef
Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.19-oe/build/v4.19.110-90-gad35ac79caef

No regressions (compared to build v4.19.109-92-gad35ac79caef)

No fixes (compared to build v4.19.109-92-gad35ac79caef)

Ran 17272 total tests in the following environments and test suites.

Environments
--------------
- dragonboard-410c - arm64
- hi6220-hikey - arm64
- i386
- juno-r2 - arm64
- qemu_arm
- qemu_arm64
- qemu_i386
- qemu_x86_64
- x15 - arm
- x86_64

Test Suites
-----------
* build
* install-android-platform-tools-r2600
* linux-log-parser
* perf
* kselftest
* libhugetlbfs
* ltp-commands-tests
* ltp-containers-tests
* ltp-dio-tests
* ltp-filecaps-tests
* ltp-fs-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* network-basic-tests
* v4l2-compliance
* ltp-cap_bounds-tests
* ltp-cpuhotplug-tests
* ltp-cve-tests
* ltp-fcntl-locktests-tests
* spectre-meltdown-checker-test
* ltp-open-posix-tests
--
Linaro LKFT
https://lkft.linaro.org
shuah
2020-03-18 00:08:08 UTC
Permalink
This is the start of the stable review cycle for the 4.19.111 release.
There are 89 patches in this series, all will be posted as a response
to this one. If anyone has any issues with these being applied, please
let me know.
Responses should be made by Thu, 19 Mar 2020 10:31:16 +0000.
Anything received after that time might be too late.
https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.111-rc1.gz
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.
thanks,
greg k-h
Compiled and booted on my test system. No dmesg regressions.

thanks,
-- Shuah

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