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a04a480d43
linux/drivers
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David Ahern a04a480d43 net: Require exact match for TCP socket lookups if dif is l3mdev 
Currently, socket lookups for l3mdev (vrf) use cases can match a socket
that is bound to a port but not a device (ie., a global socket). If the
sysctl tcp_l3mdev_accept is not set this leads to ack packets going out
based on the main table even though the packet came in from an L3 domain.
The end result is that the connection does not establish creating
confusion for users since the service is running and a socket shows in
ss output. Fix by requiring an exact dif to sk_bound_dev_if match if the
skb came through an interface enslaved to an l3mdev device and the
tcp_l3mdev_accept is not set.

skb's through an l3mdev interface are marked by setting a flag in
inet{6}_skb_parm. The IPv6 variant is already set; this patch adds the
flag for IPv4. Using an skb flag avoids a device lookup on the dif. The
flag is set in the VRF driver using the IP{6}CB macros. For IPv4, the
inet_skb_parm struct is moved in the cb per commit 971f10eca1, so the
match function in the TCP stack needs to use TCP_SKB_CB. For IPv6, the
move is done after the socket lookup, so IP6CB is used.

The flags field in inet_skb_parm struct needs to be increased to add
another flag. There is currently a 1-byte hole following the flags,
so it can be expanded to u16 without increasing the size of the struct.

Fixes: 193125dbd8 ("net: Introduce VRF device driver")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-17 10:17:05 -04:00
..
accessibility
acpi Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
amba
android
ata
atm
auxdisplay
base memory-hotplug: fix store_mem_state() return value 2016-10-07 18:46:28 -07:00
bcma
block kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
bluetooth Bluetooth: btusb: Fix atheros firmware download error 2016-10-07 09:46:56 +02:00
bus ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
cdrom
char Merge branch 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-11 23:38:39 -07:00
clk ARM: SoC: late DT updates for v4.9 2016-10-07 21:34:49 -07:00
clocksource ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
connector
cpufreq Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2016-10-06 07:59:37 -07:00
cpuidle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 14:04:16 -07:00
dax Merge branch 'for-4.9/dax' into libnvdimm-for-next 2016-10-07 16:46:30 -07:00
dca
devfreq
dio
dma dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
dma-buf Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
edac * Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO 2016-10-04 12:06:26 -07:00
eisa
extcon
firewire
firmware ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
fmc
fpga
gpio Merge branch 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-10-07 14:12:21 -07:00
gpu Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2016-10-07 11:58:38 -07:00
hsi
hv Drivers: hv: get rid of id in struct vmbus_channel 2016-09-27 12:35:49 +02:00
hwmon hwmon updates for v4.9 2016-10-04 10:56:14 -07:00
hwspinlock
hwtracing
i2c Merge branch 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-10-07 14:12:21 -07:00
ide
idle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
iio Staging/IIO patches for 4.9-rc1 2016-10-05 14:50:51 -07:00
infiniband IB/ipoib: move back IB LL address into the hard header 2016-10-14 10:54:53 -04:00
input Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
iommu IOMMU Updates for Linux v4.9 2016-10-11 12:52:41 -07:00
ipack
irqchip Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
isdn
leds
lguest
lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-10-06 17:36:53 -07:00
mcb mcb: Add a dma_device to mcb_device 2016-09-27 12:33:47 +02:00
md kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
media Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick
message
mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
mmc USB/PHY/EXTCON patches for 4.9-rc1 2016-10-03 20:17:35 -07:00
mtd Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
net net: Require exact match for TCP socket lookups if dif is l3mdev 2016-10-17 10:17:05 -04:00
nfc
ntb
nubus
nvdimm Merge branch 'for-4.9/dax' into libnvdimm-for-next 2016-10-07 16:46:30 -07:00
nvme nvme: use the DMA_ATTR_NO_WARN attribute 2016-10-11 15:06:32 -07:00
nvmem ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
of IOMMU Updates for Linux v4.9 2016-10-11 12:52:41 -07:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
parisc
parport
pci PCI changes for the v4.9 merge window: 2016-10-13 17:08:58 -07:00
pcmcia
perf ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
phy
pinctrl ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
platform platform-drivers-x86 for 4.9-1 2016-10-13 16:52:39 -07:00
pnp
power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
ptp drivers/ptp: Fix kernel memory disclosure 2016-10-13 10:20:06 -04:00
pwm
rapidio rapidio/rio_cm: use memdup_user() instead of duplicating code 2016-10-11 15:06:32 -07:00
ras
regulator Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
remoteproc rpmsg updates for v4.9 2016-10-06 17:03:49 -07:00
reset
rpmsg
rtc Merge branches 'ib-mfd-gpio-4.9', 'ib-mfd-gpio-regulator-4.9', 'ib-mfd-input-4.9', 'ib-mfd-regulator-4.9', 'ib-mfd-regulator-4.9.1', 'ib-mfd-regulator-rtc-4.9', 'ib-mfd-regulator-rtc-4.9-1' and 'ib-mfd-rtc-4.9' into ibs-for-mfd-merged 2016-10-04 15:47:01 +01:00
s390 SCSI misc on 20161006 2016-10-07 09:28:53 -07:00
sbus
scsi Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block 2016-10-09 17:29:33 -07:00
sfi
sh
sn
soc ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
spi kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
spmi spmi: pmic-arb: Return an error code if sanity check fails 2016-09-27 12:43:34 +02:00
ssb
staging Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
target
tc
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
thunderbolt
tty kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
uio
usb treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
uwb
vfio vfio_pci: use pci_alloc_irq_vectors 2016-09-29 13:36:38 -06:00
vhost
video fbdev changes for 4.9 2016-10-12 11:01:37 -07:00
virt
virtio
vlynq
vme vme: fake: remove unexpected unlock in fake_master_set() 2016-09-27 12:43:35 +02:00
w1
watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2016-10-13 16:44:20 -07:00
xen xen: features and fixes for 4.9-rc0 2016-10-06 11:19:10 -07:00
zorro
Kconfig
Makefile