[PATCH 3.16 133/217] KVM: VMX: avoid guest hang on invalid invept instruction

From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.kernel
Subject	[PATCH 3.16 133/217] KVM: VMX: avoid guest hang on invalid invept instruction
Date	2016-04-27 02:10 +0200
Message-ID	<rsldj-8vJ-75@gated-at.bofh.it> (permalink)
References	<rskqR-7Qj-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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3.16.35-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Bonzini <pbonzini@redhat.com>

commit 2849eb4f99d54925c543db12917127f88b3c38ff upstream.

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

Fixes: bfd0a56b90005f8c8a004baf407ad90045c2b11e
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 arch/x86/kvm/vmx.c | 1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6601,6 +6601,7 @@ static int handle_invept(struct kvm_vcpu
 	if (!(types & (1UL << type))) {
 		nested_vmx_failValid(vcpu,
 				VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
+		skip_emulated_instruction(vcpu);
 		return 1;
 	}

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[PATCH 3.16 133/217] KVM: VMX: avoid guest hang on invalid invept  instruction Ben Hutchings <ben@decadent.org.uk> - 2016-04-27 02:10 +0200

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