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Vitaly Kuznetsov e8f0a89cd7 hv_netvsc: fix a race between netvsc_send() and netvsc_init_buf() 
Fix in commit 8809883482 ("hv_netvsc: set nvdev link after populating
chn_table") turns out to be incomplete. A crash in
netvsc_get_next_send_section() is observed on mtu change when the device
is under load. The race I identified is: if we get to netvsc_send() after
we set net_device_ctx->nvdev link in netvsc_device_add() but before we
finish netvsc_connect_vsp()->netvsc_init_buf() send_section_map is not
allocated and we crash. Unfortunately we can't set net_device_ctx->nvdev
link after the netvsc_init_buf() call as during the negotiation we need
to receive packets and on the receive path we check for it. It would
probably be possible to split nvdev into a pair of nvdev_in and nvdev_out
links and check them accordingly in get_outbound_net_device()/
get_inbound_net_device() but this looks like an overkill.

Check that send_section_map is allocated in netvsc_send().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-10-21 11:27:31 -04:00
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accessibility
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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
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android
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ata
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atm
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auxdisplay
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base memory-hotplug: fix store_mem_state() return value 2016-10-07 18:46:28 -07:00
bcma
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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
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char net: use core MTU range checking in WAN drivers 2016-10-20 14:51:09 -04:00
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
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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
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devfreq
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dio
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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
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extcon
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firewire net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
firmware ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
fmc
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fpga
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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 net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
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
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hwtracing
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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
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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 net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -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
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irqchip Merge branch 'akpm' (patches from Andrew) 2016-10-11 17:34:10 -07:00
isdn net: deprecate eth_change_mtu, remove usage 2016-10-13 09:36:57 -04:00
leds
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lguest
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lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
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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 net: deprecate eth_change_mtu, remove usage 2016-10-13 09:36:57 -04:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick
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message net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
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 hv_netvsc: fix a race between netvsc_send() and netvsc_init_buf() 2016-10-21 11:27:31 -04:00
nfc
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ntb
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nubus
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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
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parport
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pci PCI changes for the v4.9 merge window: 2016-10-13 17:08:58 -07:00
pcmcia
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perf ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
phy
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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
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power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
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pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
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ptp drivers/ptp: Fix kernel memory disclosure 2016-10-13 10:20:06 -04:00
pwm
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rapidio rapidio/rio_cm: use memdup_user() instead of duplicating code 2016-10-11 15:06:32 -07:00
ras
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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
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rpmsg
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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 s390/net: use net core MTU range checking 2016-10-20 14:51:10 -04:00
sbus
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scsi Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block 2016-10-09 17:29:33 -07:00
sfi
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sh
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sn
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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
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staging net: use core MTU range checking in virt drivers 2016-10-20 14:51:09 -04:00
target
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tc
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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
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tty net: use core MTU range checking in WAN drivers 2016-10-20 14:51:09 -04:00
uio
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usb net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
uwb
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vfio vfio_pci: use pci_alloc_irq_vectors 2016-09-29 13:36:38 -06:00
vhost
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video fbdev changes for 4.9 2016-10-12 11:01:37 -07:00
virt
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virtio
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vlynq
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vme vme: fake: remove unexpected unlock in fake_master_set() 2016-09-27 12:43:35 +02:00
w1
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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
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Kconfig
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Makefile
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