KVM: VMX: Fix check guest state validity if a guest is in VM86 mode
If guest vcpu is in VM86 mode the vcpu state should be checked as if in
real mode.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 8d52bcf..c84f0cb 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3605,7 +3605,7 @@
return true;
/* real mode guest state checks */
- if (!is_protmode(vcpu)) {
+ if (!is_protmode(vcpu) || (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) {
if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
return false;
if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))