Commit a41ffb75 authored Mar 18, 2010 by Gleb Natapov Committed by Avi Kivity May 17, 2010

KVM: x86 emulator: If LOCK prefix is used dest arg should be memory.



If LOCK prefix is used dest arg should be memory, otherwise instruction
should generate #UD.

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

parent fd525365

arch/x86/kvm/emulate.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1842,7 +1842,7 @@ x86_emulate_insn(struct x86_emulate_ctxt ctxt, struct x86_emulate_ops ops)
		}

		/* LOCK prefix is allowed only with some instructions */
		if (c->lock_prefix && !(c->d & Lock)) {
		if (c->lock_prefix && (!(c->d & Lock) \|\| c->dst.type != OP_MEM)) {
		kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
		goto done;
		}