From nobody Mon Feb 9 02:13:35 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=oracle.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1535739412126309.40382753556355; Fri, 31 Aug 2018 11:16:52 -0700 (PDT) Received: from localhost ([::1]:56108 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvnyR-0000ZH-Oi for importer@patchew.org; Fri, 31 Aug 2018 14:16:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50034) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvnwF-0007DB-37 for qemu-devel@nongnu.org; Fri, 31 Aug 2018 14:14:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fvnwD-0005tw-DL for qemu-devel@nongnu.org; Fri, 31 Aug 2018 14:14:31 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:55882) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fvnwD-0005td-6H for qemu-devel@nongnu.org; Fri, 31 Aug 2018 14:14:29 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7VIDm0E094147 for ; Fri, 31 Aug 2018 18:14:28 GMT Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by aserp2120.oracle.com with ESMTP id 2m2y2q4vjc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 18:14:28 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7VIERKV019478 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 18:14:28 GMT Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7VIEReO021051 for ; Fri, 31 Aug 2018 18:14:27 GMT Received: from ol7.nl.oracle.com (/10.175.61.138) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 31 Aug 2018 11:14:27 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=p/3GpT6mCmpta1WDgi6uy9ouAWsAbVPq/7JoVAsXPOs=; b=h6Euy+Pxbc2SOotBSZtg52aRYcWbjbNRVV7jpTWgYQCP1vuvbibasZ8MJJeXMZ9n7gG6 qWGnZprWm7Kdmh5YKgOXqqP8WiWx70IM2YvdXKepv0QC3WsBs5RarT9GJzVk+zHlrdxr 5NcFWK9grerfSAExvlbcI+T2rDV+5wGmh5x6zCDZKwWMfcwYK8fG1vRpxQ2GjSWJcCkF oauIPBUllaXreb852TbTSUlKJV1Lxsxa+PrXXk7r/Wtmf4IWDr0Npjbk5H7bqolqfYAC qI0D7OLHeIi0fwa7lLe2aq6AXZcq85JurKII0F3vsb1G7DJEYxjNhPT16L0YmOX5Lb8l vQ== From: Liam Merwick To: qemu-devel@nongnu.org Date: Fri, 31 Aug 2018 19:16:07 +0100 Message-Id: <1535739372-24454-4-git-send-email-Liam.Merwick@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535739372-24454-1-git-send-email-Liam.Merwick@oracle.com> References: <1535739372-24454-1-git-send-email-Liam.Merwick@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9001 signatures=668708 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=930 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808310183 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 141.146.126.78 Subject: [Qemu-devel] [PATCH v3 3/8] block: Null pointer dereference in blk_root_get_parent_desc() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDMRC_1 RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The dev_id returned by the call to blk_get_attached_dev_id() in blk_root_get_parent_desc() can be NULL (an internal call to object_get_canonical_path may have returned NULL) so it should be checked before dereferencing. Signed-off-by: Liam Merwick Reviewed-by: Darren Kenny Reviewed-by: Mark Kanda --- block/block-backend.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/block-backend.c b/block/block-backend.c index fa120630be83..210eee75006a 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -136,7 +136,7 @@ static char *blk_root_get_parent_desc(BdrvChild *child) } =20 dev_id =3D blk_get_attached_dev_id(blk); - if (*dev_id) { + if (dev_id && *dev_id) { return dev_id; } else { /* TODO Callback into the BB owner for something more detailed */ --=20 1.8.3.1