From: Vitaly Kuznetsov vkuznets@redhat.com
commit 033a3ea59a19df63edb4db6bfdbb357cd028258a upstream.
kvm_cpuid_check_equal() checks for the (full) equality of the supplied CPUID data so .flags need to be checked too.
Reported-by: Sean Christopherson seanjc@google.com Fixes: c6617c61e8fe ("KVM: x86: Partially allow KVM_SET_CPUID{,2} after KVM_RUN") Signed-off-by: Vitaly Kuznetsov vkuznets@redhat.com Message-Id: 20220126131804.2839410-1-vkuznets@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kvm/cpuid.c | 1 + 1 file changed, 1 insertion(+)
--- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -113,6 +113,7 @@ static int kvm_cpuid_check_equal(struct orig = &vcpu->arch.cpuid_entries[i]; if (e2[i].function != orig->function || e2[i].index != orig->index || + e2[i].flags != orig->flags || e2[i].eax != orig->eax || e2[i].ebx != orig->ebx || e2[i].ecx != orig->ecx || e2[i].edx != orig->edx) return -EINVAL;