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Sun, 07 Sep 2025 21:30:02 -0700 (PDT) Date: Sun, 07 Sep 2025 21:30:02 -0700 In-Reply-To: <68b9b200.a00a0220.eb3d.0006.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68be5bca.050a0220.192772.0831.GAE@google.com> Subject: Re: [syzbot] [io-uring?] KASAN: null-ptr-deref Read in io_sqe_buffer_register From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, david@redhat.com, io-uring@vger.kernel.org, jgg@ziepe.ca, jhubbard@nvidia.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, peterx@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: AA4A41C0004 X-Stat-Signature: iincyxtn3czngn16tc8kiruf3fcybytw X-Rspam-User: X-HE-Tag: 1757305803-630622 X-HE-Meta: U2FsdGVkX1+Mo02TOztS5eH27rIVs6oEWTeKm1r5n4YX9/BUFuzTmFA4qYRFHNjmwkdkt0x4iPjStIFroQpyE6xX+Vt3wzUbKgH5zoI1gWjYLRz/YcHfe/FlBQp/Xy9rG4qAL9M/LUF/xycalCghBVYDZ4ZQRVXyKRkJSi/Wp2G3pf63PEkSI6vnnjBXnHDJq8ZpLA2sLGG2wm3F0yRii1XXsr8s2utUKjTcIxnzHAysqW73Eq9iv1MoZ9z/3ogKfBbewbxWZ4ezYiukZmk+Vf7uW7ikIFwVLAO+vY3QzDLhWz1+3rQpY3SIbHUPl+PIIEWOEa/PSeJM6DirE1GoR9+m5w850Q7OUnN/rimUeonEAR7oXVNbQh7G6ZpQx77/kLsH3W+8pM5Zzm8rD08kffOwHpysLdFT8kexiedl1xREiNCClvmjLKJui0eRX/SxUJZ1U/w6XewiN2t89XXK6ZdutisRJuVWLPpl5RFpF+dvvkkhqdnubVqZxli5q97o7W7wRzBHOll8oaJqBBmHYUaqWadxypJAbcnLt9uTVGXbduv9L4TQPkbAy2lX/bUxJdIu56JmwAm9xtbp/yWA7KRoKwraoWJQzMBL7K0rMcGpnTe25hlkHzsXwqQCw9WmV+M8Cf55nW6TFs2XCoioyHrAQaUcpH3C4jy96u2rPECvl281EttfX6aJeSqXAIdFDXAhfCYKg09qC1t46I5AY7XThK4dPf6a9yYXjmx/UuPHE0leYyh03neaZZQkln8bPY1c2zqAMnIpuJtsNcCRZSpzOcHGFzjl28vSkgmQ9FzYeDPAhy7cmFXqOWi9xHcxEA3tOnnkgenwpkzcahTbaef/61Pybw8LAdhuLSIChKYjHxE7rqCvWNTabkQoj+WucMXCRs8eJ/cjHyF4Xj1pqXyxfQlXy7y95Oz1T86c8GErB8GcB8NdiV2JMUl8il5EgSeSHwuQVLpvcJe0obf YEznUHxo 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has bisected this issue to: commit da6b34293ff8dbb78f8b9278c9a492925bbf1f87 Author: David Hildenbrand Date: Mon Sep 1 15:03:40 2025 +0000 mm/gup: remove record_subpages() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1240f962580000 start commit: 4ac65880ebca Add linux-next specific files for 20250904 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=1140f962580000 console output: https://syzkaller.appspot.com/x/log.txt?x=1640f962580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fbc16d9faf3a88a4 dashboard link: https://syzkaller.appspot.com/bug?extid=1ab243d3eebb2aabf4a4 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a0e312580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=101e3e62580000 Reported-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com Fixes: da6b34293ff8 ("mm/gup: remove record_subpages()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection