Wei Liu ad0a6bad44 x86/hyperv: check cpu mask after interrupt has been disabled ...

We've observed crashes due to an empty cpu mask in
hyperv_flush_tlb_others.  Obviously the cpu mask in question is changed
between the cpumask_empty call at the beginning of the function and when
it is actually used later.

One theory is that an interrupt comes in between and a code path ends up
changing the mask. Move the check after interrupt has been disabled to
see if it fixes the issue.

Signed-off-by: Wei Liu <wei.liu@kernel.org>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20210105175043.28325-1-wei.liu@kernel.org
Reviewed-by:  Michael Kelley <mikelley@microsoft.com>

2021-01-06 11:03:16 +00:00

..

hv_apic.c

x86/hyperv: Clarify comment on x2apic mode

2020-10-26 16:28:06 +00:00

hv_init.c

x86/hyperv: Fix kexec panic/hang issues

2021-01-05 17:52:04 +00:00

hv_spinlock.c

x86/hyperv: Remove aliases with X64 in their name

2020-09-27 11:34:54 +02:00

Makefile

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

mmu.c

x86/hyperv: check cpu mask after interrupt has been disabled

2021-01-06 11:03:16 +00:00

nested.c

x86/hyper-v: Add HvFlushGuestAddressList hypercall support

2018-12-21 11:28:39 +01:00