From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15E60C433F5 for ; Sun, 2 Sep 2018 13:19:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9F5020837 for ; Sun, 2 Sep 2018 13:19:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=microsoft.com header.i=@microsoft.com header.b="M/D+wb2D" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9F5020837 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730289AbeIBRcX (ORCPT ); Sun, 2 Sep 2018 13:32:23 -0400 Received: from mail-sn1nam01on0115.outbound.protection.outlook.com ([104.47.32.115]:32096 "EHLO NAM01-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730264AbeIBRcW (ORCPT ); Sun, 2 Sep 2018 13:32:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=nLwB90n5bqyZDppJPkB95gvRAix5c1IdExIm5PsZuHo=; b=M/D+wb2DBGjIWzQiu3sxtFxdbZep6mQjsImYkpLeEMKZIO6TgyjcZ4TWeCQpUBMxpLR1xCxdoitzDiM5UK2rUX5mA0VUFr8fRBzHcBz++T0P5sVT0a3IUS8mqfmjQVayKAzDH1XTUQV5scftBlJi9seb6hco2buaa+VHkBQUGSM= Received: from CY4PR21MB0776.namprd21.prod.outlook.com (10.173.192.22) by CY4PR21MB0167.namprd21.prod.outlook.com (10.173.192.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1122.2; Sun, 2 Sep 2018 13:16:28 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611%7]) with mapi id 15.20.1143.000; Sun, 2 Sep 2018 13:16:28 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Mauricio Faria de Oliveira , Jens Axboe , Sasha Levin Subject: [PATCH AUTOSEL 4.4 32/47] partitions/aix: fix usage of uninitialized lv_info and lvname structures Thread-Topic: [PATCH AUTOSEL 4.4 32/47] partitions/aix: fix usage of uninitialized lv_info and lvname structures Thread-Index: AQHUQr8iCWT0MgQRWEKNJy3q3X0B4g== Date: Sun, 2 Sep 2018 13:16:17 +0000 Message-ID: <20180902131533.184092-32-alexander.levin@microsoft.com> References: <20180902131533.184092-1-alexander.levin@microsoft.com> In-Reply-To: <20180902131533.184092-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0167;6:FPqZu/ZdVPbbo83thG5k37Rop1ZCsu3I/ltQV/YAXvISyMPWO0p0rAiMdEgy6lAsfHGoN3yB9rhfIO4njFsJ/1aqubN0de09AGMKncvwiZpJe9oARTH1YBR+3nzowXUf09IVLyevcBq9wbaC69MDUNL3nbJsJ3NQqBeE7s8EKZ+zZM91xQV29tg97V0G1zdCy9wpiRdbfrUvptAI8XDHL35ivQAyw9BlVCYFSDTrrcP8VObdNFlmPj1XM8mTKaakKGhwmgYikYg8MtBt3kuQY/gOPF3molCacQbFoBzIMVYM0de/AK2Tmv+LQK9STfPsLl8Nzxtrq7+an+GxkSkQWz1BD4ppn6qjpNrouLCYnGXj6y1pBD1K3IDysRTmM7uRaiI28Oezmt+snpAmFuYSpef2AhiIxkhE0OAfBc4IHuIALcO9YhkxdiVY2zKYRpc7A6DNDkOZHB7Rl1Az5StghA==;5:0UJEkaoo0b6r++PEAuOCVahN2VvGTOKIHP+utd7EprJ6uBAjNpPGGOKBy/gw7rpunEvMoJMSwW4nliLAbqpurl1tSu5cRsbi9cPNzjOEXHS3LLmn8KcUsdky+5a2UXNOrMyjp4Ln+FPDEAsRCWGewBEzhlfDOtl0uEPv4K3NpI0=;7:mO1ricw4aQEAqMYJ9E3aooWYIwzMouUAgHSLNhygGbF/TXvQfzyyfGLSLVonF+S5S+RQIBkBkz4kEPJXivufKuOwqVNTorjZNuMBuKpKG3ARmp5t9/dF82f3hHFrtcW870g7qqnO2gY4RiGsd7gPBmQvhKLrl6fmjztkXdFBIbJuoOfXdMT9EiqhtNxN/yixyEagiZmD+OHBzf3KDzc4ZaMEAY0TTku6cMDboJodGRsYhfDmCHUddvM77Bv4OSDy x-ms-office365-filtering-correlation-id: add4e4b7-d561-43c3-455d-08d610d64abb x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0167; x-ms-traffictypediagnostic: CY4PR21MB0167: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(198206253151910); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(8121501046)(5005006)(10201501046)(3002001)(93006095)(93001095)(3231340)(944501410)(52105095)(2018427008)(6055026)(149027)(150027)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123558120)(20161123560045)(20161123564045)(20161123562045)(201708071742011)(7699049)(76991033);SRVR:CY4PR21MB0167;BCL:0;PCL:0;RULEID:;SRVR:CY4PR21MB0167; x-forefront-prvs: 078310077C x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(136003)(39860400002)(376002)(346002)(366004)(396003)(199004)(189003)(305945005)(6436002)(7736002)(6486002)(106356001)(105586002)(6512007)(53936002)(8676002)(36756003)(6666003)(6346003)(186003)(476003)(486006)(26005)(2616005)(11346002)(446003)(5660300001)(2501003)(5250100002)(10090500001)(102836004)(97736004)(6506007)(2900100001)(81156014)(316002)(81166006)(66066001)(22452003)(217873002)(2906002)(99286004)(54906003)(5024004)(1076002)(8936002)(76176011)(68736007)(110136005)(3846002)(10290500003)(4326008)(25786009)(478600001)(6116002)(86612001)(86362001)(107886003)(72206003)(14454004)(256004);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR21MB0167;H:CY4PR21MB0776.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: 5e2Y3DVJWYE9EyeDin2JInWtxehoE2o+3vsGaB0bWJt2MgSmns6izAX2CNe3FMOzVsmup4t9MZiri0oIR9s2PjirdzxzBaZ645LLRa8aqdF0uLGUDOJOKzjRoMD0+7W6TBMmhNy06QZD71TQD5/4auyGZGOqo9Xj6qZCX3qNBvb+ycYKQ1p70ay7X6Q1RbkJZbrajjn1t2H5ZhZWaWxE27Hgb44AhoJPpRNBWrPgO9RQFEUR/xBNVQo9XQ+0B87mueRVHpZliMOVPZPDOFI/X1fFhVSaI9KakwwUpBlMzdxYLLXdLusnSfYHdW+ihY+KMfObhEmNVvUPxpXP3otq1mYw8m3zbrEaoNSKbQeVJ5o= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: add4e4b7-d561-43c3-455d-08d610d64abb X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Sep 2018 13:16:17.9571 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0167 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mauricio Faria de Oliveira [ Upstream commit 14cb2c8a6c5dae57ee3e2da10fa3db2b9087e39e ] The if-block that sets a successful return value in aix_partition() uses 'lvip[].pps_per_lv' and 'n[].name' potentially uninitialized. For example, if 'numlvs' is zero or alloc_lvn() fails, neither is initialized, but are used anyway if alloc_pvd() succeeds after it. So, make the alloc_pvd() call conditional on their initialization. This has been hit when attaching an apparently corrupted/stressed AIX LUN, misleading the kernel to pr_warn() invalid data and hang. [...] partition (null) (11 pp's found) is not contiguous [...] partition (null) (2 pp's found) is not contiguous [...] partition (null) (3 pp's found) is not contiguous [...] partition (null) (64 pp's found) is not contiguous Fixes: 6ceea22bbbc8 ("partitions: add aix lvm partition support files") Signed-off-by: Mauricio Faria de Oliveira Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/partitions/aix.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/block/partitions/aix.c b/block/partitions/aix.c index fa74698e12a6..8e7d358e0226 100644 --- a/block/partitions/aix.c +++ b/block/partitions/aix.c @@ -177,7 +177,7 @@ int aix_partition(struct parsed_partitions *state) u32 vgda_sector =3D 0; u32 vgda_len =3D 0; int numlvs =3D 0; - struct pvd *pvd; + struct pvd *pvd =3D NULL; struct lv_info { unsigned short pps_per_lv; unsigned short pps_found; @@ -231,10 +231,11 @@ int aix_partition(struct parsed_partitions *state) if (lvip[i].pps_per_lv) foundlvs +=3D 1; } + /* pvd loops depend on n[].name and lvip[].pps_per_lv */ + pvd =3D alloc_pvd(state, vgda_sector + 17); } put_dev_sector(sect); } - pvd =3D alloc_pvd(state, vgda_sector + 17); if (pvd) { int numpps =3D be16_to_cpu(pvd->pp_count); int psn_part1 =3D be32_to_cpu(pvd->psn_part1); --=20 2.17.1