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Tue, 23 May 2023 06:42:04 +0000 Received: from PH0PR11MB4839.namprd11.prod.outlook.com ([fe80::7ca2:120f:99dd:7812]) by PH0PR11MB4839.namprd11.prod.outlook.com ([fe80::7ca2:120f:99dd:7812%4]) with mapi id 15.20.6411.028; Tue, 23 May 2023 06:42:04 +0000 Date: Tue, 23 May 2023 14:44:02 +0800 From: Pengfei Xu To: Bagas Sanjaya CC: Linux regressions mailing list , "Darrick J. Wong" , , , , , Subject: Re: [Syzkaller & bisect] There is BUG: unable to handle kernel NULL pointer dereference in xfs_extent_free_diff_items in v6.4-rc3 Message-ID: References: <20230522160525.GB11620@frogsfrogsfrogs> <89b7cfee-164a-470e-c375-73b109fdf214@gmail.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <89b7cfee-164a-470e-c375-73b109fdf214@gmail.com> X-ClientProxiedBy: SGAP274CA0016.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b6::28) To PH0PR11MB4839.namprd11.prod.outlook.com (2603:10b6:510:42::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR11MB4839:EE_|IA0PR11MB7791:EE_ X-MS-Office365-Filtering-Correlation-Id: 4869b2db-4203-4f1a-0670-08db5b58d1d4 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr 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:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR11MB4839.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(376002)(346002)(136003)(366004)(396003)(39860400002)(451199021)(53546011)(26005)(186003)(54906003)(44832011)(6512007)(6506007)(86362001)(6916009)(66476007)(66556008)(4326008)(66946007)(316002)(478600001)(107886003)(82960400001)(41300700001)(2906002)(83380400001)(38100700002)(5660300002)(8936002)(8676002)(6486002)(67856001);DIR:OUT;SFP:1102; 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Bagas recently out of the blue started > > to help with adding regressions to the tracking. That's great, but OTOH > > it means that it's likely time to write a few things up that are obvious > > to some of us and myself. > > > > Bagas, please for the foreseeable future don't add regressions found by > > syzkaller to the regression tracking, unless some well known developer > > actually looked into the issue and indicated that it's something that > > needs to be fixed. > > > > Syzbot is great. But it occasionally does odd things or goes of the > > rails. And in can easily find problems that didn't happen in an earlier > > version, but are unlikely to be encountered by users in practice (aka > > "in the wild"). And we normally don't consider those regressions that > > needs to be fixed. > > > > Oops, at the moment I didn't know how to distinguish true regressions > and issues found by the bot, so I thought that both are regressions. > > Thanks for the tip! > The bisect used keyword "xfs_extent_free_diff_items" to bisect, and seems it's not accurate this time. I will consider improving it. Thanks! BR. > -- > An old man doll... just what I always wanted! - Clara >