From nobody Mon Feb 9 03:00:17 2026 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 732D312BF29; Mon, 26 Feb 2024 14:44:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.165.32 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708958668; cv=none; b=V3Wdb+2NgS3H/zd3ET1KljWxZN6/c9F0BrqkLapTXu9Y/iZHRr1Q5HpX9rJbnJ3cUbX6V15QokponENwFGJOuIT9ufti/03z4DixRttJ5uImOmBQU9oYG5A9EXo+SvRV/0eQIYMoD5zZRxa37EHo3BDFbXt+qfz+ykfsmsYgrc0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708958668; c=relaxed/simple; bh=WS8wGXmQM2s1gH1iYfEEVs4FsClq44BPDrBK14QrVOA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=KMYRu1dtWWn7AsrX7f79Sp8Rhd3c6fLfFqQjbR3Bwq/NT7sdm8oQJml56nj5+AyesllRslhwEg6YDm7QVuqjY1Weprosj6Pf3fUUNQTHd1wyHmLV0g9ZiG4RWmbA/hDHi4RLsH6VmPURK7zx7WxwwbF4CICd+80Wo6lMZ8Y0qhQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=DCHsz+Gk; arc=none smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="DCHsz+Gk" Received: from pps.filterd (m0246617.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 41QDLLdF031418; Mon, 26 Feb 2024 14:43:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=corp-2023-11-20; bh=vEUYPk/vTjUcosp4mayE+HEMCQCXiWr8F/WnC06iTYQ=; b=DCHsz+GkTt9rNVCCdVmhEAkA5ZrezQMCfGL0y2w6tT5OrubfWdR3EMvzYZY3RbpxEZnk barjTYcrSibPx4+EHS/o4v7vcubTQDkDZ+RxzYFxbu2UuWmpFp7dZPmzteWCRvCrx9CK JM9cvc7kJtJlPsKCkCVOxaUZUiphApUhgywD4gP+oyE3KrdxaXAVg8uQOtFrI6V7YCpH qXMXCXCqm8Ym2+iNcby3Nxdnwd6mrTdSnqnfT9dGs2iYdyUTw8iNQUvzdk1vmBNBCHWj bN1sv7j7+ATNc8+eV9AD6pWoZochj9pYZZ2YdfB8onjtjQ0a+T5Dpv7yIH0LnZfssE+z Qw== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3wf90v4njc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 26 Feb 2024 14:43:58 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 41QESwwd001840; Mon, 26 Feb 2024 14:43:56 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3wf6w5n9ry-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 26 Feb 2024 14:43:56 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 41QEhuwF030519; Mon, 26 Feb 2024 14:43:56 GMT Received: from ca-dev112.us.oracle.com (ca-dev112.us.oracle.com [10.129.136.47]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3wf6w5n9qa-1; Mon, 26 Feb 2024 14:43:55 +0000 From: Harshit Mogalapalli To: Matthew Sakai , dm-devel@lists.linux.dev, Mike Snitzer , Ken Raeburn , Chung Chung , Thomas Jaskiewicz , Harshit Mogalapalli , John Wiele , "J. corwin Coburn" , linux-kernel@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, dan.carpenter@linaro.org Subject: [PATCH] dm vdo: Fix a use-after-free in load_index_save() Date: Mon, 26 Feb 2024 06:41:35 -0800 Message-ID: <20240226144155.2101066-1-harshit.m.mogalapalli@oracle.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-26_10,2024-02-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 malwarescore=0 adultscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402260111 X-Proofpoint-GUID: 4v26zrTyEdjYF7bZ2CgOZzmIitR6aBNZ X-Proofpoint-ORIG-GUID: 4v26zrTyEdjYF7bZ2CgOZzmIitR6aBNZ Content-Type: text/plain; charset="utf-8" Smatch warns: drivers/md/dm-vdo/indexer/index-layout.c:1570 load_index_save() warn: 'table' was already freed. Store the error value in result and then free the table before returning. Fixes: b46d79bdb82a ("dm vdo: add deduplication index storage interface") Signed-off-by: Harshit Mogalapalli --- This is based on static analysis and only compile tested. --- drivers/md/dm-vdo/indexer/index-layout.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/md/dm-vdo/indexer/index-layout.c b/drivers/md/dm-vdo/i= ndexer/index-layout.c index 1453fddaa656..18fac999e3e4 100644 --- a/drivers/md/dm-vdo/indexer/index-layout.c +++ b/drivers/md/dm-vdo/indexer/index-layout.c @@ -1566,10 +1566,11 @@ static int __must_check load_index_save(struct inde= x_save_layout *isl, =20 =20 if (table->header.type !=3D RH_TYPE_SAVE) { + result =3D vdo_log_error_strerror(UDS_CORRUPT_DATA, + "unexpected index save %u header type %u", + instance, table->header.type); vdo_free(table); - return vdo_log_error_strerror(UDS_CORRUPT_DATA, - "unexpected index save %u header type %u", - instance, table->header.type); + return result; } =20 result =3D read_index_save_data(reader, isl, table->header.payload); --=20 2.39.3