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Commit 6aebfa6e authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
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KVM: x86 emulator: inject #UD on access to non-existing CR 



Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent ab8557b2

arch/x86/kvm/emulate.c

+7 −0
Original line number Diff line number Diff line
@@ -2520,6 +2520,13 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) 
		c->dst.type = OP_NONE;

		break;

	case 0x20: /* mov cr, reg */

		switch (c->modrm_reg) {

		case 1:

		case 5 ... 7:

		case 9 ... 15:

			kvm_queue_exception(ctxt->vcpu, UD_VECTOR);

			goto done;

		}

		c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu);

		c->dst.type = OP_NONE;	/* no writeback */

		break;