From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BDA6E57C93 for ; Sat, 30 Nov 2024 01:51:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732931466; cv=none; b=u8pv2uUefPkdUJ51pFSWkoaikk8KZ+EqldAtE5aIoMu/3F9fl7Y9+jUPDAZVZNhNH2sM2xN92M1EOz2N98Yvy4WnVBhuK5917w7icNqItNpgNQEUPu03Hggn0zc967nGymPGDl+ZL7/agcC5tlgkNFpNElKN/3b3/NuMWzs/XB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732931466; c=relaxed/simple; bh=NUbjVQgGoFqAnXA/IchsC9G2+649iBaX9zpc6YKoK04=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=X3eJsKMQeH96hpcjJXSjNBzoOb+zDbQm1/w6W4Z5ZBtK3XdR/6oRgWhzCRwhPM7Kf4WPUswfBxceZIEmm4jS994DZoGZCH6584aqjLZbLrMZ9gT6YCVSIjfZI/gzAln1FBHh/G8tDrksMs74cTfpuaTcU8CfFLpB9dnhRezg8xA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-3a778ce76fbso22773605ab.1 for ; Fri, 29 Nov 2024 17:51:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732931464; x=1733536264; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=PfRP17he4fRD3Fi6XiiwKiBdoJ3HW7GQoqniKTEAxDI=; b=f+vQV+LDMXQGy40GI8iBjqgW/meb6SaDfFq49p05OCIKFsKv/H3M7rOpgPEG+ryfS0 MReBD689Rs70bkpeFT3wJ7MPipgs2QM1N90/d2ZCOWet0OI3Ubqe8vOhFTPQs/pVYLmB ESvVQ0nw4ou83qvyWGA66BGpdfd9rEHRXjmiC+v4XomWXJEm3WwuoY6sbVACH1zTyAcj rrSJZPMGpDfoo/vbkGCl4c5UOM8Igp/4Bx+d15hoC7+ph2xvd6EKDwYRCS9EDAfEeQkZ tz2axw7CNkloBqV98FWQA0VuHdqE1xP7trft5L6oM7Lfuum+FT0Lao33nmpNc7cv7hci RMIw== X-Forwarded-Encrypted: i=1; AJvYcCXPCU6OYsjsCKU2XmTEiWchWrfumcsvrCKI7Cm0h2mZDl1nuGKSGdqVbwXBUm/5T0qM5EbBCNKIYzVhsyM=@vger.kernel.org X-Gm-Message-State: AOJu0YzdR6z6gp5zZYVSZW02JKR7gB0hrR7eiTETLV4iQ/QaiMr+LJjG /ClxN6oVJ+AR6+5+Hb0FvusJXXr89xBJMjBrRsEn6tc/w4OJa/qpMSUq0GF/c5lCosNgDiA0WcQ IihPEmlPA0y1wEPZOeVs3Df72ORdsKnRurQQqbAmzizB27wHePMwn8XY= X-Google-Smtp-Source: AGHT+IGWvCi6MZhdxrapdtlirxLTp6zo0MxlEQi6Z6S1fxcH6GoBRYn2AapBStNo1CI/jCHuUxoGfQINBiAGJLKg1+Kar9y7JT70 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:154b:b0:3a7:81a4:a54d with SMTP id e9e14a558f8ab-3a7c55eb884mr133715385ab.20.1732931463806; 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" 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.