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Fri, 29 Nov 2024 17:51:03 -0800 (PST) Date: Fri, 29 Nov 2024 17:51:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <674a6f87.050a0220.253251.00d5.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, 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: 9014A40008 X-Stat-Signature: xz4mofwt9tpek8pi73hibed6m6r3a7q3 X-Rspam-User: X-HE-Tag: 1732931454-453561 X-HE-Meta: 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 g+XAkuTK 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.009257, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: MAX_LOCKDEP_KEYS too low! BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 11728 Comm: kworker/u8:10 Not tainted 6.12.0-rc7-syzkaller-00133-g17a4e91a431b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: btrfs-cache btrfs_work_helper Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 register_lock_class+0x827/0x980 kernel/locking/lockdep.c:1328 __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5077 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 process_one_work kernel/workqueue.c:3204 [inline] process_scheduled_works+0x950/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Tested on: commit: 17a4e91a btrfs: test if we need to wait the writeback .. git tree: https://github.com/adam900710/linux.git writeback_fix console output: https://syzkaller.appspot.com/x/log.txt?x=12c5ad30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa4954ad2c62b915 dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.