KVM: VMX: avoid guest hang on invalid invept instruction

[ Upstream commit 2849eb4f ]

A guest executing an invalid invept instruction would hang
because the instruction pointer was not updated.

Cc: stable@vger.kernel.org
Fixes: bfd0a56bReviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

arch/x86/kvm/vmx.c

@@ -6740,6 +6740,7 @@ static int handle_invept(struct kvm_vcpu *vcpu)
 	if (!(types & (1UL << type))) {
 		nested_vmx_failValid(vcpu,
 				VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
+		skip_emulated_instruction(vcpu);
 		return 1;
 	}