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Wed, 04 Dec 2024 12:18:03 -0800 (PST) Date: Wed, 04 Dec 2024 12:18:03 -0800 In-Reply-To: <67505f88.050a0220.17bd51.0069.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6750b8fb.050a0220.17bd51.0074.GAE@google.com> Subject: Re: [syzbot] [mm] KASAN: null-ptr-deref Write in sys_io_uring_register From: syzbot To: akpm@linux-foundation.org, asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, tamird@gmail.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 4BBAC4000E X-Stat-Signature: j7ad9o371scir5uhrq1z4kpf9yxywpnx X-HE-Tag: 1733343473-888548 X-HE-Meta: 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 ZNkQXKFa 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 wB+iG63Y E0l+kTpa1WlslURmVsRphNW6jtNtqKf2A3bOIRiBxYr7JKOdgy5wtl5ymEu2Kt9WE4aKw02QI7u/R84nGDQpJTPQT+XxM1dKq1qHF8Zb2nAOCktsfM4v3xp2kvOFhaJyiTZQ1QPGM4XXlpXFyjxTA43W28OWOJCu 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 d2e88c71bdb07f1e5ccffbcc80d747ccd6144b75 Author: Tamir Duberstein Date: Tue Nov 12 19:25:37 2024 +0000 xarray: extract helper from __xa_{insert,cmpxchg} bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17435fc0580000 start commit: c245a7a79602 Add linux-next specific files for 20241203 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=14c35fc0580000 console output: https://syzkaller.appspot.com/x/log.txt?x=10c35fc0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=af3fe1d01b9e7b7 dashboard link: https://syzkaller.appspot.com/bug?extid=092bbab7da235a02a03a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a448df980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15cca330580000 Reported-by: syzbot+092bbab7da235a02a03a@syzkaller.appspotmail.com Fixes: d2e88c71bdb0 ("xarray: extract helper from __xa_{insert,cmpxchg}") For information about bisection process see: https://goo.gl/tpsmEJ#bisection