From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55170) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dtxBk-0004hG-Lk for qemu-devel@nongnu.org; Mon, 18 Sep 2017 10:38:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dtxBj-0005D8-Rf for qemu-devel@nongnu.org; Mon, 18 Sep 2017 10:38:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49498) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dtxBj-0005BR-Ml for qemu-devel@nongnu.org; Mon, 18 Sep 2017 10:38:19 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BC19A8047F for ; Mon, 18 Sep 2017 14:38:18 +0000 (UTC) From: Mohammed Gamal Date: Mon, 18 Sep 2017 16:37:50 +0200 Message-Id: <1505745470-12208-4-git-send-email-mgamal@redhat.com> In-Reply-To: <1505745470-12208-1-git-send-email-mgamal@redhat.com> References: <1505745470-12208-1-git-send-email-mgamal@redhat.com> Subject: [Qemu-devel] [PATCH v4 3/3] x86_iommu: check if machine has PCI bus List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: ehabkost@redhat.com, mst@redhat.com, thuth@redhat.com, peterx@redhat.com, pbonzini@redhat.com, Mohammed Gamal Starting qemu with qemu-system-x86_64 -S -M isapc -device {amd|intel}-iommu leads to a segfault. The code assume PCI bus is present and tries to access the bus structure without checking. Since Intel VT-d and AMDVI should only work with PCI, add a check for PCI bus and return error if not present. Signed-off-by: Mohammed Gamal --- hw/i386/x86-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c index 51de519..8a01a2d 100644 --- a/hw/i386/x86-iommu.c +++ b/hw/i386/x86-iommu.c @@ -88,7 +88,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp) PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE)); QLIST_INIT(&x86_iommu->iec_notifiers); - if (!pcms) { + if (!pcms || !pcms->bus) { error_setg(errp, "Machine-type '%s' not supported by IOMMU", mc->name); return; -- 1.8.3.1