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Thu, 28 Nov 2024 10:56:03 -0800 (PST) Date: Thu, 28 Nov 2024 10:56:03 -0800 In-Reply-To: <67432dee.050a0220.1cc393.0041.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6748bcc3.050a0220.253251.008c.GAE@google.com> Subject: Re: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback From: syzbot To: akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nogikh@google.com, syzkaller-bugs@googlegroups.com, willy@infradead.org, wqu@suse.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 941EF40009 X-Stat-Signature: 3afn1jnkspeokxrukmxfjs74pg9gz748 X-Rspam-User: X-HE-Tag: 1732820158-433202 X-HE-Meta: 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 R5fOgVJE 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 y3LzZSPV edMuk/fxfmh0JRJAqDlv8DXKc+7bLEoBBMdMJG8992g/rdKV2xhqsvcqJONNeRn0CGkWYKmuBvIh14AiHTP2U8r7j/iY4106xe+3Msm4eq/BaPoNidR4dZGPiOP3H+0erU6IfSuPqhXuCbqufF5mDJrHI4s2a6kzVVJ/MacYy8Y= 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 c87c299776e4d75bcc5559203ae2c37dc0396d80 Author: Qu Wenruo Date: Thu Oct 10 04:46:12 2024 +0000 btrfs: make buffered write to copy one page a time bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=165dd3c0580000 start commit: 228a1157fb9f Merge tag '6.13-rc-part1-SMB3-client-fixes' o.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=155dd3c0580000 console output: https://syzkaller.appspot.com/x/log.txt?x=115dd3c0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=402159daa216c89d dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13840778580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17840778580000 Reported-by: syzbot+aac7bff85be224de5156@syzkaller.appspotmail.com Fixes: c87c299776e4 ("btrfs: make buffered write to copy one page a time") For information about bisection process see: https://goo.gl/tpsmEJ#bisection