Vitaly Kuznetsov d7f2fbafb4 Drivers: hv: vmbus: serialize Offer and Rescind offer ... Commit 4b2f9abea5 ("staging: hv: convert channel_mgmt.c to not call osd_schedule_callback")' was written under an assumption that we never receive Rescind offer while we're still processing the initial Offer request. However, the issue we fixed in 04a258c162 could be caused by this assumption not always being true. In particular, we need to protect against the following: 1) Receiving a Rescind offer after we do queue_work() for processing an Offer request and before we actually enter vmbus_process_offer(). work.func points to vmbus_process_offer() at this moment and in vmbus_onoffer_rescind() we do another queue_work() without a check so we'll enter vmbus_process_offer() twice. 2) Receiving a Rescind offer after we enter vmbus_process_offer() and especially after we set >state = CHANNEL_OPEN_STATE. Many things can go wrong in that case, e.g. we can call free_channel() while we're still using it. Implement the required protection by changing work->func at the very end of vmbus_process_offer() and checking work->func in vmbus_onoffer_rescind(). In case we receive rescind offer during or before vmbus_process_offer() is done we set rescind flag to true and we check it at the end of vmbus_process_offer() so such offer will not get lost. Suggested-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-01-25 09:18:01 -08:00
..
accessibility	…
acpi	Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2015-01-14 07:53:51 +13:00
amba	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
android	Add security hooks to binder and implement the hooks for SELinux.	2015-01-25 09:17:57 -08:00
ata	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
atm	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
auxdisplay	…
base	Merge branches 'pm-domains', 'powercap' and 'pm-tools'	2014-12-29 21:24:00 +01:00
bcma	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
block	NVMe: Fix locking on abort handling	2015-01-08 09:02:23 -07:00
bluetooth	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	2014-12-15 13:23:09 -05:00
bus	drivers: bus: check cci device tree node status	2015-01-16 19:10:41 -08:00
cdrom	…
char	i8k: Add support for fan labels	2015-01-25 09:17:59 -08:00
clk	clk: fix possible null pointer dereference	2015-01-17 11:33:57 -08:00
clocksource	Fixes for 3.19	2014-12-30 15:27:20 +01:00
connector	…
coresight	coresight: fixing validity check on remote device	2015-01-12 05:04:14 -08:00
cpufreq	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	2014-12-29 21:23:41 +01:00
cpuidle	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	2014-12-29 21:23:41 +01:00
crypto	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
dca	…
devfreq	…
dio	…
dma	dmaengine: dw: balance PM runtime calls	2015-01-13 23:07:58 +05:30
dma-buf	…
edac	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
eisa	…
extcon	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
firewire	firewire: sbp2: replace card lock by target lock	2014-12-10 20:53:21 +01:00
firmware	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
fmc	…
gpio	gpio: dln2: use bus_sync_unlock instead of scheduling work	2015-01-09 07:57:35 +01:00
gpu	Merge tag 'amdkfd-fixes-2015-01-06' of git://people.freedesktop.org/~gabbayo/linux into drm-fixes	2015-01-08 10:36:37 +10:00
hid	HID: roccat: potential out of bounds in pyra_sysfs_write_settings()	2015-01-09 14:41:01 +01:00
hsi	* misc. fixes in omap-ssi and nokia-modem drivers	2014-12-15 17:33:47 -08:00
hv	Drivers: hv: vmbus: serialize Offer and Rescind offer	2015-01-25 09:18:01 -08:00
hwmon	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2014-12-17 10:16:27 -08:00
hwspinlock	…
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2014-12-20 13:52:52 -08:00
ide	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
idle	…
iio	First round of IIO fixes for the 3.19 cycle.	2015-01-08 17:59:04 -08:00
infiniband	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
input	Revert "Input: atmel_mxt_ts - use deep sleep mode when stopped"	2014-12-31 12:59:34 -08:00
iommu	iommu/rockchip: Drop owner assignment from platform_drivers	2015-01-05 12:40:06 +01:00
ipack	…
irqchip	Merge branch 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-15 17:30:09 -08:00
isdn	isdn: fix NUL (\0 or \x00) specification in string	2015-01-12 15:31:35 -05:00
leds	leds: netxbig: fix oops at probe time	2015-01-13 13:49:01 -08:00
lguest	virtio: allow finalize_features to fail	2014-12-09 16:32:32 +02:00
macintosh	macintosh: therm_pm72: delete deprecated driver	2014-12-19 19:32:47 +01:00
mailbox	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mcb	mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0	2015-01-09 15:46:37 -08:00
md	dm: fix missed error code if .end_io isn't implemented by target_type	2014-12-17 12:31:13 -05:00
media	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
memory	MTD updates for 3.19:	2014-12-17 09:59:26 -08:00
memstick	…
message	…
mfd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2014-12-30 16:59:59 -08:00
misc	VMCI: Fix two UVA mapping bugs	2015-01-25 09:18:00 -08:00
mmc	mmc: sdhci: Set SDHCI_POWER_ON with external vmmc	2015-01-14 09:47:19 +01:00
mtd	MTD updates for 3.19:	2014-12-17 09:59:26 -08:00
net	tg3: Release tp->lock before invoking synchronize_irq()	2015-01-14 17:05:51 -05:00
nfc	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
ntb	…
nubus	…
of	ARM: SoC/iommu configuration for 3.19	2014-12-16 14:53:01 -08:00
oprofile	…
parisc	…
parport	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
pci	Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-19 14:02:02 -08:00
pcmcia	pcmcia: fix incorrect bracketing on a test	2015-01-25 09:18:00 -08:00
phy	phy: phy-ti-pipe3: fix inconsistent enumeration of PCIe gen2 cards	2014-12-23 15:44:32 +05:30
pinctrl	pinctrl: st: Add irq_disable hook to st_gpio_irqchip	2015-01-07 10:44:39 +01:00
platform	platform-drivers-x86 for 3.19	2014-12-18 20:24:55 -08:00
pnp	pnpbios: bail out on strange errors	2015-01-25 09:17:59 -08:00
power	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
powercap	powercap / RAPL: add IDs for future Xeon CPUs	2014-12-17 02:35:42 +01:00
pps	…
ps3	…
ptp	…
pwm	pwm: Changes for v3.19-rc1	2014-12-17 10:10:51 -08:00
rapidio	…
ras	…
regulator	regulator: Fix for v3.19	2014-12-29 13:24:38 -08:00
remoteproc	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
reset	reset: sunxi: fix spinlock initialization	2015-01-16 19:11:31 -08:00
rpmsg	…
rtc	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
s390	s390/zcrypt: kernel oops at insmod of the z90crypt device driver	2014-12-18 09:55:55 +01:00
sbus	…
scsi	scsi: ->queue_rq can't sleep	2015-01-09 15:43:01 +01:00
sfi	…
sh	drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM	2014-12-05 03:08:24 +01:00
sn	…
soc	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
spi	Merge remote-tracking branches 'spi/fix/img-spfi' and 'spi/fix/msiof' into spi-linus	2014-12-24 12:57:54 +00:00
spmi	…
ssb	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
staging	staging: vt6655: fix sparse warning: argument type	2015-01-12 19:49:47 -08:00
target	iscsi-target: Fix typos in enum cmd_flags_table	2015-01-09 15:25:58 -08:00
tc	…
thermal	Merge branch 'thermal-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2015-01-15 19:20:26 +13:00
thunderbolt	…
tty	serial: samsung: Add the support for Exynos5433 SoC	2015-01-09 13:46:02 -08:00
uio	uio: uio_fsl_elbc_gpcm: new driver	2015-01-12 05:04:13 -08:00
usb	usb: fixes for v3.19-rc6	2015-01-14 16:27:23 -08:00
uwb	…
vfio	vfio-pci: Fix the check on pci device type in vfio_pci_probe()	2015-01-07 10:29:11 -07:00
vhost	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-01-13 15:23:26 +13:00
video	fbdev/broadsheetfb: fix memory leak	2015-01-13 15:13:45 +02:00
virt	…
virtio	virtio_pci: document why we defer kfree	2015-01-06 16:35:36 +02:00
vlynq	…
vme	vme: fix misspelling of current function in string	2015-01-12 05:04:12 -08:00
w1	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
watchdog	watchdog: imx2_wdt: Fix the argument of watchdog_active()	2014-12-18 16:01:20 +01:00
xen	Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus	2014-12-18 05:56:29 -08:00
zorro	…
Kconfig	Staging patches for 3.19-rc1	2014-12-15 18:06:13 -08:00
Makefile	drivers: Move iommu/ before gpu/ in Makefile	2014-12-22 11:47:37 +02:00