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92e4dc8b05
linux/drivers
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Chris Co 92e4dc8b05 Drivers: hv: vmbus: Allow cleanup of VMBUS_CONNECT_CPU if disconnected 
When invoking kexec() on a Linux guest running on a Hyper-V host, the
kernel panics.

    RIP: 0010:cpuhp_issue_call+0x137/0x140
    Call Trace:
    __cpuhp_remove_state_cpuslocked+0x99/0x100
    __cpuhp_remove_state+0x1c/0x30
    hv_kexec_handler+0x23/0x30 [hv_vmbus]
    hv_machine_shutdown+0x1e/0x30
    machine_shutdown+0x10/0x20
    kernel_kexec+0x6d/0x96
    __do_sys_reboot+0x1ef/0x230
    __x64_sys_reboot+0x1d/0x20
    do_syscall_64+0x6b/0x3d8
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

This was due to hv_synic_cleanup() callback returning -EBUSY to
cpuhp_issue_call() when tearing down the VMBUS_CONNECT_CPU, even
if the vmbus_connection.conn_state = DISCONNECTED. hv_synic_cleanup()
should succeed in the case where vmbus_connection.conn_state
is DISCONNECTED.

Fix is to add an extra condition to test for
vmbus_connection.conn_state == CONNECTED on the VMBUS_CONNECT_CPU and
only return early if true. This way the kexec() path can still shut
everything down while preserving the initial behavior of preventing
CPU offlining on the VMBUS_CONNECT_CPU while the VM is running.

Fixes: 8a857c5542 ("Drivers: hv: vmbus: Always handle the VMBus messages on CPU0")
Signed-off-by: Chris Co <chrco@microsoft.com>
Reviewed-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201110190118.15596-1-chrco@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-11-11 10:58:09 +00:00
..
accessibility Char/Misc driver fixes for 5.9-rc3 2020-08-26 10:50:50 -07:00
acpi ACPI: processor: Fix build for ARCH_APICTIMER_STOPS_ON_C3 unset 2020-09-23 13:50:12 +02:00
amba
android drivers: android: Fix the SPDX comment style 2020-07-29 17:05:44 +02:00
ata libata-5.9-2020-09-04 2020-09-04 13:19:19 -07:00
atm atm: eni: fix the missed pci_disable_device() for eni_init_one() 2020-09-04 21:42:57 -07:00
auxdisplay A trivial patch for auxdisplay: 2020-09-05 14:22:46 -07:00
base mm: don't rely on system state to detect hot-plug operations 2020-09-26 10:33:57 -07:00
bcma bcma: gpio: Use irqchip template 2020-08-02 18:26:51 +03:00
block drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage() 2020-10-02 15:27:08 -07:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2020-07-31 15:11:52 -07:00
bus treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
cdrom
char Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
clk clk: socfpga: stratix10: fix the divider for the emac_ptp_free_clk 2020-09-22 12:54:41 -07:00
clocksource clocksource: clint: Export clint_time_val for modules 2020-09-29 23:55:27 -07:00
connector
counter counter: microchip-tcb-capture: check the correct variable 2020-08-22 11:38:42 +01:00
cpufreq cpufreq: intel_pstate: Fix missing return statement 2020-09-30 17:37:23 +02:00
cpuidle cpuidle: Drop misleading comments about RCU usage 2020-09-22 19:32:03 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
dax dax: Fix stack overflow when mounting fsdax pmem device 2020-09-20 08:57:36 -07:00
dca
devfreq PM / devfreq: tegra30: Disable clock on error in probe 2020-09-23 13:35:58 +09:00
dio
dma dmaengine: dmatest: Prevent to run on misconfigured channel 2020-09-22 20:18:05 +05:30
dma-buf dmabuf: fix NULL pointer dereference in dma_buf_release() 2020-09-21 11:17:06 +02:00
edac EDAC/ghes: Check whether the driver is on the safe list correctly 2020-09-15 09:42:15 +02:00
eisa
extcon
firewire treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
firmware Single EFI fix for v5.9-rc: 2020-09-20 15:18:11 -07:00
fpga Linux 5.8-rc7 2020-07-27 11:49:37 +02:00
fsi
gnss
gpio gpio: pca953x: Survive spurious interrupts 2020-10-07 11:47:41 +02:00
gpu drm/amd/display: Change ABM config init interface 2020-10-08 17:15:52 -04:00
greybus greybus: Use fallthrough pseudo-keyword 2020-07-29 16:58:08 +02:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2020-09-02 12:55:46 -07:00
hsi treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hv Drivers: hv: vmbus: Allow cleanup of VMBUS_CONNECT_CPU if disconnected 2020-11-11 10:58:09 +00:00
hwmon hwmon fixes for v5.9-rc3 2020-08-29 12:37:00 -07:00
hwspinlock
hwtracing treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
i2c i2c: owl: Clear NACK and BUS error bits 2020-10-10 13:15:46 +02:00
i3c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ide treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
idle cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic 2020-08-26 12:41:53 +02:00
iio iio: adc: qcom-spmi-adc5: fix driver name 2020-09-22 13:33:19 +01:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-10-05 11:27:14 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2020-10-03 11:37:23 -07:00
interconnect interconnect: qcom: Fix small BW votes being truncated to zero 2020-09-04 00:07:12 +03:00
iommu iommu/vt-d: Fix lockdep splat in iommu_flush_dev_iotlb() 2020-10-01 14:54:17 +02:00
ipack
irqchip A set of fixes for interrupt chip drivers: 2020-08-30 11:56:54 -07:00
isdn treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
leds LEDs changes for 5.9-rc1. 2020-08-05 19:24:27 -07:00
lightnvm treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
macintosh treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mailbox iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
mcb
md dm: fix comment in dm_process_bio() 2020-09-21 19:49:15 -04:00
media media fixes for v5.9-rc7 2020-09-24 09:05:04 -07:00
memory treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
memstick memstick: Skip allocating card when removing host 2020-09-28 12:16:13 +02:00
message treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mfd - Bug Fixes 2020-08-28 10:15:33 -07:00
misc Char / Misc driver fixes for 5.9-rc5 2020-09-13 08:52:21 -07:00
mmc mmc: core: don't set limits.discard_granularity as 0 2020-10-09 08:26:09 +02:00
most drivers: most: add USB adapter driver 2020-07-31 14:38:12 +02:00
mtd Revert "mtd: spi-nor: Add capability to disable flash quad mode" 2020-09-14 20:58:27 +05:30
mux treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
net net: usb: qmi_wwan: add Cellient MPL200 card 2020-10-08 12:26:31 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-03 18:50:48 -07:00
ntb treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nubus
nvdimm libnvdimm: KASAN: global-out-of-bounds Read in internal_create_group 2020-08-17 14:47:38 -06:00
nvme block5.9-2020-10-08 2020-10-08 18:48:34 -07:00
nvmem nvmem: qcom-spmi-sdam: Enable multiple devices 2020-07-29 17:12:09 +02:00
of of: address: Work around missing device_type property in pcie nodes 2020-08-19 16:30:57 -06:00
opp Merge branch 'opp/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm 2020-09-01 19:44:20 +02:00
oprofile
parisc Merge branch 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2020-08-12 12:41:15 -07:00
parport treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pci pci-v5.9-fixes-2 2020-10-02 14:48:25 -07:00
pcmcia treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
perf treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
phy phy: Second round of fixes for 5.9 2020-09-29 17:21:54 +02:00
pinctrl pinctrl: mediatek: check mtk_is_virt_gpio input parameter 2020-10-01 09:51:36 +02:00
platform platform-drivers-x86 for v5.9-3 2020-10-06 12:00:52 -07:00
pnp
power Power Supply Fixes for 5.9 cycle 2020-10-09 11:38:07 -07:00
powercap powercap: RAPL: Add support for Lakefield 2020-09-16 14:16:04 +02:00
pps
ps3 treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ptp ptp: ptp_clockmatrix: use i2c_master_send for i2c write 2020-08-19 16:23:22 -07:00
pwm pwm: Changes for v5.9-rc1 2020-08-14 16:00:09 -07:00
rapidio rapidio: Replace 'select' DMAENGINES 'with depends on' 2020-09-05 19:52:54 +03:00
ras
regulator regulator: Fix for v5.9 2020-09-25 15:16:01 -07:00
remoteproc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
reset treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
rpmsg treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
rtc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
s390 s390 fixes for 5.9-rc7 2020-09-26 11:01:18 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-10-05 11:27:14 -07:00
sfi
sh iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
siox
slimbus
soc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
soundwire soundwire: fix double free of dangling pointer 2020-09-03 14:10:19 +05:30
spi spi: Fix for v5.9 2020-10-09 18:05:12 -07:00
spmi
ssb treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
staging Staging / IIO driver fixes for 5.9-rc5 2020-09-13 09:15:20 -07:00
target SCSI fixes on 20201002 2020-10-02 14:42:13 -07:00
tc
tee
thermal - Fix bogus thermal shutdowns for omap4430 where bogus values 2020-09-04 12:49:03 -07:00
thunderbolt thunderbolt: Fix for v5.9-rc6 2020-09-15 13:52:14 +02:00
tty serial: 8250_pci: Add Realtek 816a and 816b 2020-09-16 13:23:33 +02:00
uio
usb usbcore/driver: Accommodate usbip 2020-09-25 16:53:02 +02:00
vdpa vdpa/mlx5: Fix dependency on MLX5_CORE 2020-10-08 16:02:00 -04:00
vfio treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
vhost vhost-vdpa: fix page pinning leakage in error path 2020-10-04 03:47:02 -04:00
video drm-misc-fixes for v5.9: 2020-10-06 12:38:28 +10:00
virt
virtio virtio: pci: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
visorbus
vlynq
vme
w1
watchdog treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
xen xen/events: don't use chip_data for legacy IRQs 2020-10-01 14:45:26 +02:00
zorro
Kconfig
Makefile