KVM: Disable irq while unregistering user notifier

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Function user_notifier_unregister should be called only once for each
registered user notifier.

Function kvm_arch_hardware_disable can be executed from an IPI context
which could cause a race condition with a VCPU returning to user mode
and attempting to unregister the notifier.

Signed-off-by: Ignacio Alvarado <ikalvarado@google.com>
Cc: stable@vger.kernel.org
Fixes: 18863bdd60 ("KVM: x86 shared msr infrastructure")
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Ignacio Alvarado 2016-11-04 12:15:55 -07:00 • committed by Radim Krčmář

parent 8b95344064

commit 1650b4ebc9

1 changed files with 11 additions and 2 deletions

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arch/x86/kvm/x86.c

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