From nobody Mon Sep 16 19:01:53 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; arc=pass (i=1 dmarc=pass fromdomain=nvidia.com); dmarc=pass(p=reject dis=none) header.from=nvidia.com ARC-Seal: i=2; a=rsa-sha256; t=1673878473; cv=pass; d=zohomail.com; s=zohoarc; b=cJXvL3e2Fwu2rTlBA7PX9B2xV73alhGeK6zESS79MEJ000jeA9a9P89MtSwHMtXgsx3C08N2T/CdzShCaf6QYTfpcy8sU+0qqz1hwAjFc0IZsXrWaNbTVyUG6UjvY6AI8qqRl4wVtYswn6VOWB3v4ZjtAthFMBR3muMlHvDU0nE= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1673878473; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=jJkOFNmqZNgWafMrpbwZLIyQY9fQkQPMJwKlAZkkfgk=; b=X5NnDgN5B97Unsb4a2qmoQIbtAXbXvRx81cw/L6zVABE0ZpaqB2h8jPSve/5/D5kpqJLqdM2Mfo9M8GT1OkxCG3F3G+Y9qxX3tGZTYuAm3uO6+YddKDQpo6BoCQs82DIzAOT4hf0HBSi0D3cQ1sIGLK3gkK512io1so/ZBPZuoE= ARC-Authentication-Results: i=2; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; arc=pass (i=1 dmarc=pass fromdomain=nvidia.com); dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1673878473166233.95763314762655; Mon, 16 Jan 2023 06:14:33 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pHQDz-0002Y9-Mf; Mon, 16 Jan 2023 09:12:35 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pHQDq-0002Vh-9x; Mon, 16 Jan 2023 09:12:26 -0500 Received: from mail-bn8nam12on2061.outbound.protection.outlook.com ([40.107.237.61] helo=NAM12-BN8-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pHQDn-0002NX-Ms; Mon, 16 Jan 2023 09:12:25 -0500 Received: from DM5PR07CA0071.namprd07.prod.outlook.com (2603:10b6:4:ad::36) by MW3PR12MB4571.namprd12.prod.outlook.com (2603:10b6:303:5c::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5986.23; Mon, 16 Jan 2023 14:12:17 +0000 Received: from DM6NAM11FT080.eop-nam11.prod.protection.outlook.com (2603:10b6:4:ad:cafe::a4) by DM5PR07CA0071.outlook.office365.com (2603:10b6:4:ad::36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.19 via Frontend Transport; Mon, 16 Jan 2023 14:12:17 +0000 Received: from mail.nvidia.com (216.228.117.160) by DM6NAM11FT080.mail.protection.outlook.com (10.13.173.105) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.13 via Frontend Transport; Mon, 16 Jan 2023 14:12:16 +0000 Received: from rnnvmail204.nvidia.com (10.129.68.6) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 16 Jan 2023 06:12:05 -0800 Received: from rnnvmail201.nvidia.com (10.129.68.8) by rnnvmail204.nvidia.com (10.129.68.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 16 Jan 2023 06:12:05 -0800 Received: from vdi.nvidia.com (10.127.8.9) by mail.nvidia.com (10.129.68.8) with Microsoft SMTP Server id 15.2.986.36 via Frontend Transport; Mon, 16 Jan 2023 06:11:58 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=AqbitFi9nrbPlwck0LMZi4xxMMP4WRWuKUsSgp4TU4ei9ZI6BHBXP/Ki2lzZliMcL1S/68ziVmBQ0hWovP6kYYVzaPUEriMPF/d/DhtGBm2K47sFrjEWQgvOHFNj/a7Y0Stf7zQry+5x1c1mjngos6jCvsFB+tBTGOjzNjUSJs8gtH1l7UqnAmEbUc+eYz3qiInDXe34jLcVKT74HG8ukh0rrzoY52Ke6fqPu72iRAi+OVoZvbqdES4qLc3zt9xQtYmFuZh8bih2xTvQ9p1KXljsFjqcfn8iHiEkhqhL8X0nJfK7FKaieKErsJRKKH0Vif0+fILVaJEK2OJVnx39VA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=jJkOFNmqZNgWafMrpbwZLIyQY9fQkQPMJwKlAZkkfgk=; b=fZZF3Kw81aM7flnowhrPCX1FTC09q9xFanDPLQooquca/cU7tyhGL4UUSss7eDyVdPNF8wb92d885EtD5yQp8MeiWV7GCRxG/Vw97/E5aIcj2u4Wi7f7NhkRBQ3nfsGEF6ue/TWM4nQix6VYPiJrM7BexqJwL/ZQQonMQDw1fHL6CKhIWSeLlbiSEybbxGf/hrQVKSUXzXRZj1bSN6uV0S4HlcqhpLJxEhRDNsn0lACHBMRcNWmXfLLuhp6KL6yBVz8RdLEgiJBELFmSV/CHO23PIX6nG8hB6ybpJD/90l2b/nJ7tc7T0T1pz1MQaPQrkD0ijUNaEZa6zkU/nWVjlw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=nongnu.org smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jJkOFNmqZNgWafMrpbwZLIyQY9fQkQPMJwKlAZkkfgk=; b=q34UuqT7NyR7AZ8yYuYGen/Y+PSZYtvH6WzQurXEG8Lvi3lDR9r28wZnmGLmQGVpiwkNOcaUP222eCKfmvLDEO/jpJ7/I1NvknRZK3fLzF+ZFjHvzpGqyya9jzWwiTdFl0Fn0zGXaCgCUbDXpLVgvaIXGeurQjIc9TF+l4YIeKHyPjNBrTau6/ytDrEZ1j23l+8Zj/WRY8/mQIP4sz1QDjr085pragaukUScTt5oPx3/HESkk9G24UDEBFo2bGh5WCbZI+HYjh2x3QEAb69NsATB7M1QW8YU3ZDHatYgHOjtBhF19hE4sx0mtXZXQ4ckbXViM5LD2jFiOxoOFhpDvA== X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.160) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C From: Avihai Horon To: CC: Alex Williamson , Halil Pasic , Christian Borntraeger , Eric Farman , Richard Henderson , David Hildenbrand , "Ilya Leoshkevich" , Thomas Huth , "Juan Quintela" , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , Cornelia Huck , Paolo Bonzini , Stefan Hajnoczi , Fam Zheng , Eric Blake , Vladimir Sementsov-Ogievskiy , John Snow , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , , , Yishai Hadas , Jason Gunthorpe , Maor Gottlieb , Avihai Horon , Kirti Wankhede , Tarun Gupta , Joao Martins Subject: [PATCH v8 03/13] vfio/migration: Fix NULL pointer dereference bug Date: Mon, 16 Jan 2023 16:11:25 +0200 Message-ID: <20230116141135.12021-4-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20230116141135.12021-1-avihaih@nvidia.com> References: <20230116141135.12021-1-avihaih@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT080:EE_|MW3PR12MB4571:EE_ X-MS-Office365-Filtering-Correlation-Id: 78bd9db9-2863-4059-c8d4-08daf7cbac75 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230022)(4636009)(136003)(396003)(39860400002)(376002)(346002)(451199015)(46966006)(36840700001)(40470700004)(36756003)(356005)(86362001)(8676002)(4326008)(6916009)(8936002)(70586007)(70206006)(5660300002)(2906002)(7416002)(36860700001)(7636003)(83380400001)(82740400003)(478600001)(7696005)(54906003)(40460700003)(426003)(6666004)(316002)(40480700001)(82310400005)(41300700001)(1076003)(2616005)(336012)(47076005)(186003)(26005); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2023 14:12:16.8762 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 78bd9db9-2863-4059-c8d4-08daf7cbac75 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT080.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4571 Received-SPF: softfail client-ip=40.107.237.61; envelope-from=avihaih@nvidia.com; helo=NAM12-BN8-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @Nvidia.com) X-ZM-MESSAGEID: 1673878473880100005 Content-Type: text/plain; charset="utf-8" As part of its error flow, vfio_vmstate_change() accesses MigrationState->to_dst_file without any checks. This can cause a NULL pointer dereference if the error flow is taken and MigrationState->to_dst_file is not set. For example, this can happen if VM is started or stopped not during migration and vfio_vmstate_change() error flow is taken, as MigrationState->to_dst_file is not set at that time. Fix it by checking that MigrationState->to_dst_file is set before using it. Fixes: 02a7e71b1e5b ("vfio: Add VM state change handler to know state of VM= ") Signed-off-by: Avihai Horon Reviewed-by: Juan Quintela Reviewed-by: Vladimir Sementsov-Ogievskiy --- hw/vfio/migration.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index e1413ac90c..09fe7c1de2 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -743,7 +743,9 @@ static void vfio_vmstate_change(void *opaque, bool runn= ing, RunState state) */ error_report("%s: Failed to set device state 0x%x", vbasedev->name, (migration->device_state & mask) | value); - qemu_file_set_error(migrate_get_current()->to_dst_file, ret); + if (migrate_get_current()->to_dst_file) { + qemu_file_set_error(migrate_get_current()->to_dst_file, ret); + } } vbasedev->migration->vm_running =3D running; trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state), --=20 2.26.3