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Fri, 16 Apr 2021 19:35:09 +0000 From: "Gervais, Francois" To: "linux-btrfs@vger.kernel.org" Subject: read time tree block corruption detected Thread-Topic: read time tree block corruption detected Thread-Index: AQHXMvQIVkE2UJzwZEu4ya+WYER7yw== Date: Fri, 16 Apr 2021 19:35:09 +0000 Message-ID: Accept-Language: en-CA, en-US Content-Language: en-CA X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=none action=none header.from=distech-controls.com; x-originating-ip: [76.67.142.108] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bf28fa36-b19a-48a9-0bc6-08d9010ebee8 x-ms-traffictypediagnostic: DM6PR01MB5403: x-microsoft-antispam-prvs: x-pp-identifier: acuityo365 x-ms-oob-tlc-oobclassifiers: OLM:7219; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR01MB4265.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(4636009)(136003)(39860400002)(346002)(376002)(396003)(366004)(55016002)(5660300002)(2906002)(76116006)(6506007)(6916009)(66446008)(86362001)(83380400001)(9686003)(122000001)(91956017)(316002)(26005)(66946007)(7696005)(33656002)(66556008)(38100700002)(64756008)(478600001)(71200400001)(52536014)(186003)(66476007)(8676002)(8936002);DIR:OUT;SFP:1101; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: distech-controls.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR01MB4265.prod.exchangelabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: bf28fa36-b19a-48a9-0bc6-08d9010ebee8 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Apr 2021 19:35:09.2794 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: caadbe96-024e-4f67-82ec-fb28ff53d16d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Cchuz2/XqUNXTK+CcELBB4ukdE6wu7UJwhjTdVyFbXatw1+rROP8m3ZGW6FAz113WHlq2l2rnSSOf6G8eTCjbg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR01MB5403 X-Proofpoint-ORIG-GUID: 3UlSXTWJOBbyWsW57q_HhkHOmfOxn5Rp X-Proofpoint-GUID: 3UlSXTWJOBbyWsW57q_HhkHOmfOxn5Rp X-Proofpoint-Processed: True X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 adultscore=0 priorityscore=1501 phishscore=0 mlxlogscore=829 bulkscore=0 impostorscore=0 clxscore=1011 suspectscore=0 malwarescore=0 mlxscore=0 spamscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104160137 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org We are using btrfs on one of our embedded devices and we got filesystem cor= ruption on one of them.=0A= =0A= This product=A0undergo a lot of tests on our side and apparently it's the f= irst it happened so it seems to be a pretty rare occurrence. However we sti= ll want to get to the bottom of this to ensure it doesn't happen in the fut= ure.=0A= =0A= Some background:=0A= - The corruption happened on kernel v5.4.72.=0A= - On the debug device I'm on master (v5.12.0-rc7) hoping it might help to h= ave all the latest patches.=0A= =0A= Here what kernel v5.12.0-rc7 tells me when trying to mount the partition:= =0A= =0A= Apr 16 19:31:45 buildroot kernel: BTRFS info (device loop0p3): disk space c= aching is enabled=0A= Apr 16 19:31:45 buildroot kernel: BTRFS info (device loop0p3): has skinny e= xtents=0A= Apr 16 19:31:45 buildroot kernel: BTRFS info (device loop0p3): start tree-l= og replay=0A= Apr 16 19:31:45 buildroot kernel: BTRFS critical (device loop0p3): corrupt = leaf: root=3D18446744073709551610 block=3D790151168 slot=3D5 ino=3D5007, in= ode ref overflow, ptr 15853 end 15861 namelen 294=0A= Apr 16 19:31:45 buildroot kernel: BTRFS error (device loop0p3): block=3D790= 151168 read time tree block corruption detected=0A= Apr 16 19:31:45 buildroot kernel: BTRFS critical (device loop0p3): corrupt = leaf: root=3D18446744073709551610 block=3D790151168 slot=3D5 ino=3D5007, in= ode ref overflow, ptr 15853 end 15861 namelen 294=0A= Apr 16 19:31:45 buildroot kernel: BTRFS error (device loop0p3): block=3D790= 151168 read time tree block corruption detected=0A= Apr 16 19:31:45 buildroot kernel: BTRFS: error (device loop0p3) in btrfs_re= cover_log_trees:6246: errno=3D-5 IO failure (Couldn't read tree log root.)= =0A= Apr 16 19:31:45 buildroot kernel: BTRFS: error (device loop0p3) in btrfs_re= play_log:2341: errno=3D-5 IO failure (Failed to recover log tree)=0A= Apr 16 19:31:45 buildroot e512c123daaa[468]: mount: /root/mnt: can't read s= uperblock on /dev/loop0p3.=0A= Apr 16 19:31:45 buildroot kernel: BTRFS error (device loop0p3): open_ctree = failed: -5=0A= =0A= Any suggestions?=