KVM: x86 emulator: inject #UD on access to non-existing CR
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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@ -2520,6 +2520,13 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
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c->dst.type = OP_NONE;
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break;
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case 0x20: /* mov cr, reg */
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switch (c->modrm_reg) {
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case 1:
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case 5 ... 7:
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case 9 ... 15:
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kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
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goto done;
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}
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c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu);
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c->dst.type = OP_NONE; /* no writeback */
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break;
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