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Wed, 9 Aug 2023 14:11:02 +0000 Date: Wed, 9 Aug 2023 16:10:59 +0200 From: Stephan Wurm To: hch Cc: Richard Weinberger , linux-block , Miquel Raynal , Vignesh Raghavendra , linux-mtd , linux-kernel , Johannes Eigner Subject: Re: ubiblock: null pointer dereference using scatterlist in work_queue Message-ID: References: <1293911429.1782934.1691445776353.JavaMail.zimbra@nod.at> <20230809135308.GA32214@lst.de> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230809135308.GA32214@lst.de> X-ClientProxiedBy: FR3P281CA0197.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:a5::7) To DU0PR10MB7436.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:10:424::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR10MB7436:EE_|DB9PR10MB7098:EE_ X-MS-Office365-Filtering-Correlation-Id: 87ef0352-c5a0-4a3e-fad5-08db98e2768b 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:DU0PR10MB7436.EURPRD10.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230028)(7916004)(39840400004)(346002)(376002)(396003)(366004)(136003)(1800799006)(186006)(451199021)(9686003)(6512007)(6506007)(107886003)(66556008)(316002)(38100700002)(54906003)(86362001)(5660300002)(44832011)(558084003)(4326008)(2906002)(66476007)(8676002)(6916009)(33716001)(8936002)(66946007)(41300700001)(6666004)(6486002)(478600001)(83380400001);DIR:OUT;SFP:1101; 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Aug 15:53 hat hch geschrieben: > Well, a scatterlist culd contain a highmem page, in which case sg_virt > isn't going to cut it and you need to kmap. Is this a 32-bit system > with highmem enabled? I can confirm it is a 32-bit system with highmem enabled.