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KVM: VMX: Fix check guest state validity if a guest is in VM86 mode

PATCH Applied Gleb Natapov 2 participants 2 messages Apr 14, 2013 – Apr 16, 2013

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x86 KVM KVM x86
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Gleb Natapov

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PATCH 1/1 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 <[email protected]>
arch/x86/kvm/vmx.c +1 -1
index d268677..fec7c48 100644
@@ -3554,7 +3554,7 @@ static bool guest_state_valid(struct kvm_vcpu *vcpu)
 		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))

--
Gleb.