KVM: x86 emulator: fix 0f 01 /5 emulation

It is undefined and should generate #UD.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index c3b9334eb248..7c7debb424df 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2490,6 +2490,9 @@ twobyte_insn:
                                     (c->src.val & 0x0f), ctxt->vcpu);
                         c->dst.type = OP_NONE;
                         break;
+                case 5: /* not defined */
+                        kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
+                        goto done;
                 case 7: /* invlpg*/
                         emulate_invlpg(ctxt->vcpu, memop);
                         /* Disable writeback. */