From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f77.google.com (mail-pj1-f77.google.com [209.85.216.77]) (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 1B03F472791 for ; Tue, 30 Jun 2026 16:03:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782835414; cv=none; b=Wy98yNzXaWgmDGMWw6IOL7JPnmfUbj9HyPSQInSOt4XYuAD4NuZTKWlax3A7G5MVeLANXRjmiHHllYHvD8Eu/xzv9EyKJZrPe1X76Vs68kLkcB6UESnf/+dLA0GuFfhh6pTdHhrR5BIiWr+ion0o6Dnv16k1XKPjbpbXKHsfARo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782835414; c=relaxed/simple; bh=/22uG64J3eRQFbpMIuQVzHct/PllMBqgSYH0pi3S/+4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=RZAaw8zm0SMXr5/nogPr9fJf0guK8jLNdxLQ/FZ6H4tg0QIJUinxLvv/ODRJzCRIic7guzN/Y5QtLmn3N6o7fWT09Vggl/3HBs20BZ1m/zHXLa2j80R9OvX7Xz8VYNdwzxf0EBfFs3HzSbrxsGrtEAAl7t+/Co/Ak2Ff/fMYTaY= 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=209.85.216.77 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-pj1-f77.google.com with SMTP id 98e67ed59e1d1-37d4f23eb37so6290093a91.0 for ; Tue, 30 Jun 2026 09:03:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782835407; x=1783440207; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/5T6XosU/Pqyd1cJG2nB2SJGl/xyezxbbwM8AF0WS1E=; b=Cu2AgGiRT6uD4GQPQIVlXuBDTSFgpX6CXfjDgRr0c/0n6A4Xw+956LMeZs+oteFlsq l1yARskozFV5brnjB5P2XF5JmxOX+Nu1mTCSm1xilE/Kb3O9FpeLHriJ70gRSlof6haF sqIItAhKkPf1v8U93nu/uGZ/Jg1VUAHLYUbRwumZvweS8DtoIwdv2d5APWroX4RESd0K L+y231HMq9Q81d39iEJlC/vOapDtqHNMsXluXcz75pLwxqwox2z6mGvSwckq/xfLONe6 o0iH20kMwpvilOlQqfO9xWlzpvUmi7wKQBpjYhf4Jp2czh8xHfjR9dJcHf9/QuJYYDtM 2lcA== X-Forwarded-Encrypted: i=1; AHgh+Ro1qKNnTfWQvOpyYb5g29IwYJ45OGwSaniQVS6lDssQFL1uiwh47xBQL8zidQE9QJDZy9e80P6ckC6QyDk=@vger.kernel.org X-Gm-Message-State: AOJu0Yw7COJJ3da1jmR8vqHcgW+y9aIRGlZ1P4lvO75jB9fuzW5yo3+V VgvN9lYElHMwS3axjYb6RATfhmQCNbHZqcnbFbkO0E7FgEukio4a8BSabhvs/qkuG+HAL62K3wD dVzU8Qrc1mgdM2NwxB30u6IfQqeRHLXw9r77Vtjr1Wg3F8CtX+w6NujR2sNc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a17:90b:1d4f:b0:37c:774c:77ba with SMTP id 98e67ed59e1d1-3805272a47fmr3201386a91.21.1782835407606; Tue, 30 Jun 2026 09:03:27 -0700 (PDT) Date: Tue, 30 Jun 2026 09:03:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a43e8cf.854d4ab9.360e1d.0014.GAE@google.com> Subject: [syzbot] [bfs?] WARNING in bfs_write_inode From: syzbot To: aivazian.tigran@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 51cb1aa1250c Merge tag 'loongarch-7.2' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=139bc246580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c3d59be33cf7e9a dashboard link: https://syzkaller.appspot.com/bug?extid=8d42a79ac5fbf8901c9a compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-51cb1aa1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6e0095e7fee9/vmlinux-51cb1aa1.xz kernel image: https://storage.googleapis.com/syzbot-assets/1d8b3c53c6c5/bzImage-51cb1aa1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8d42a79ac5fbf8901c9a@syzkaller.appspotmail.com ------------[ cut here ]------------ !buffer_uptodate(bh) WARNING: fs/buffer.c:1093 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093, CPU#0: kworker/u4:4/68 Modules linked in: CPU: 0 UID: 0 PID: 68 Comm: kworker/u4:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093 Code: 4c 89 f7 e8 c9 11 d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 d4 5e fb ff e8 8f f3 69 ff eb 8c e8 88 f3 69 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 7a f3 69 ff 90 0f 0b 90 e9 cf fd ff ff RSP: 0018:ffffc90000aef220 EFLAGS: 00010293 RAX: ffffffff825c8e48 RBX: ffff8880442f7460 RCX: ffff888000a74a80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000001 R08: ffff8880442f7467 R09: 1ffff1100885ee8c R10: dffffc0000000000 R11: ffffed100885ee8d R12: ffff88801fde124c R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880442f7460 FS: 0000000000000000(0000) GS:ffff88808c818000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b57832230 CR3: 0000000012715000 CR4: 0000000000352ef0 Call Trace: bfs_write_inode+0x4f0/0x840 fs/bfs/inode.c:167 write_inode fs/fs-writeback.c:1607 [inline] __writeback_single_inode+0x6ac/0xf90 fs/fs-writeback.c:1850 writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2079 __writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2155 wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2266 wb_check_start_all fs/fs-writeback.c:2392 [inline] wb_do_writeback fs/fs-writeback.c:2439 [inline] wb_workfn+0x980/0x10f0 fs/fs-writeback.c:2477 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup