Patch "KVM: VMX: avoid guest hang on invalid invept instruction" has been added to the 3.14-stable tree

Patch "KVM: VMX: avoid guest hang on invalid invept instruction" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    KVM: VMX: avoid guest hang on invalid invept instruction

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     kvm-vmx-avoid-guest-hang-on-invalid-invept-instruction.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2849eb4f99d54925c543db12917127f88b3c38ff Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 18 Mar 2016 16:53:29 +0100
Subject: KVM: VMX: avoid guest hang on invalid invept instruction

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/vmx.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6423,6 +6423,7 @@ 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;
 	}
 


Patches currently in stable-queue which might be from pbonzini@redhat.com are

queue-3.14/kvm-i8254-change-pit-discard-tick-policy.patch
queue-3.14/kvm-fix-spin_lock_init-order-on-x86.patch
queue-3.14/kvm-vmx-avoid-guest-hang-on-invalid-invept-instruction.patch