Commit 1161624f authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity

KVM: inject #UD in 64bit mode from instruction that are not valid there

Some instruction are obsolete in a long mode. Inject #UD.
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 89a27f4d
......@@ -1015,11 +1015,6 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
}
}
if (mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
kvm_report_emulation_failure(ctxt->vcpu, "invalid x86/64 instruction");
return -1;
}
if (c->d & Group) {
group = c->d & GroupMask;
c->modrm = insn_fetch(u8, 1, c->eip);
......@@ -1828,6 +1823,11 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
memcpy(c->regs, ctxt->vcpu->arch.regs, sizeof c->regs);
saved_eip = c->eip;
if (ctxt->mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
goto done;
}
/* LOCK prefix is allowed only with some instructions */
if (c->lock_prefix && !(c->d & Lock)) {
kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment