Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760240AbdCVPyd (ORCPT ); Wed, 22 Mar 2017 11:54:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43614 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759399AbdCVPyX (ORCPT ); Wed, 22 Mar 2017 11:54:23 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 499762B57D4 Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=david@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 499762B57D4 From: David Hildenbrand To: kvm@vger.kernel.org Cc: Paolo Bonzini , rkrcmar@redhat.com, Dmitry Vyukov , stable@vger.kernel.org, LKML , david@redhat.com Subject: [PATCH v1] KVM: x86: fix illegal MP_STATE when in/entering SMM Date: Wed, 22 Mar 2017 16:53:54 +0100 Message-Id: <20170322155354.18436-1-david@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 22 Mar 2017 15:54:00 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1144 Lines: 31 If we already entered/are about to enter SMM, don't allow switching to INIT/SIPI_RECEIVED, otherwise the next call to kvm_apic_accept_events() will report a warning. Fixes: cd7764fe9f73 ("KVM: x86: latch INITs while in system management mode") Cc: stable@vger.kernel.org # 4.2+ Reported-by: Dmitry Vyukov Signed-off-by: David Hildenbrand --- arch/x86/kvm/x86.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1faf620..7d0ec1b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7355,6 +7355,12 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, mp_state->mp_state != KVM_MP_STATE_RUNNABLE) return -EINVAL; + /* INITs are latched while in SMM */ + if ((is_smm(vcpu) || vcpu->arch.smi_pending) && + (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED || + mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED)) + return -EINVAL; + if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); -- 2.9.3