diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index bef3c3c695d73c0821f6d757a529fd313765fdcb..698efb8c38971913eee17875fd84b1ea2b5d57e4 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -5416,6 +5416,8 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len) ctxt->memopp->addr.mem.ea + ctxt->_eip); done: + if (rc == X86EMUL_PROPAGATE_FAULT) + ctxt->have_exception = true; return (rc != X86EMUL_CONTINUE) ? EMULATION_FAILED : EMULATION_OK; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 263fac7e9307d311cf8d69c3193bd944ca6405ad..f7cfd8e6edd175e0032bb4e25f015641fe507fb4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6577,6 +6577,12 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, emulation_type)) return EMULATE_DONE; if (ctxt->have_exception) { + /* + * #UD should result in just EMULATION_FAILED, and trap-like + * exception should not be encountered during decode. + */ + WARN_ON_ONCE(ctxt->exception.vector == UD_VECTOR || + exception_type(ctxt->exception.vector) == EXCPT_TRAP); inject_emulated_exception(vcpu); return EMULATE_DONE; }