KVM: x86: Inject #GP if WRMSR sets reserved bits in APIC Self-IPI

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Inject a #GP if the guest attempts to set reserved bits in the x2APIC-only
Self-IPI register.  Bits 7:0 hold the vector, all other bits are reserved.

Reported-by: Marc Orr <marcorr@google.com>
Cc: Ben Gardon <bgardon@google.com>
Cc: Venkatesh Srinivas <venkateshs@chromium.org>
Cc: stable@vger.kernel.org
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20230107011025.565472-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2023-01-07 01:10:20 +00:00

parent 85e64d09f7

commit ba5838abb0

1 changed files with 7 additions and 3 deletions

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arch/x86/kvm/lapic.c

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