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Sat, 28 Jun 2025 22:10:02 -0700 (PDT) Date: Sat, 28 Jun 2025 22:10:02 -0700 In-Reply-To: <67f94057.050a0220.2c5fcf.0001.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6860caaa.a00a0220.274b5f.000d.GAE@google.com> Subject: Re: [syzbot] [ext4?] kernel BUG in ext4_ext_insert_extent (2) From: syzbot To: adilger.kernel@dilger.ca, akpm@linux-foundation.org, dave.hansen@linux.intel.com, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: E0E671C0009 X-Stat-Signature: onxgtppu41exzudu48hxhw6s5tjgsec6 X-HE-Tag: 1751173802-389283 X-HE-Meta: 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 bjB2dG6H 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 pzhGjRuS 9yQd4RiWZc+XDheHzyiP8qH07aT6wACStuJuuy0pDiL4/kj6GY6PW/JRW6d59s0CQnnjq7CR5ywSfgNi+w896MElF47HUlL03/u1meWaVuf2OouR3xTBGVQMeORwwKQcCeWjAsGjii8= 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 665575cff098b696995ddaddf4646a4099941f5e Author: Dave Hansen Date: Fri Feb 28 20:37:22 2025 +0000 filemap: move prefaulting out of hot write path bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1434a3d4580000 start commit: 739a6c93cc75 Merge tag 'nfsd-6.16-1' of git://git.kernel.o.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1634a3d4580000 console output: https://syzkaller.appspot.com/x/log.txt?x=1234a3d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d11f52d3049c3790 dashboard link: https://syzkaller.appspot.com/bug?extid=ad86dcdffd6785f56e03 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fb2b0c580000 Reported-by: syzbot+ad86dcdffd6785f56e03@syzkaller.appspotmail.com Fixes: 665575cff098 ("filemap: move prefaulting out of hot write path") For information about bisection process see: https://goo.gl/tpsmEJ#bisection