Hello, syzbot found the following issue on: HEAD commit: e0756cfc Merge tag 'trace-v5.11-rc7' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14d0f814d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a53fd47f16f22f8c dashboard link: https://syzkaller.appspot.com/bug?extid=7d5c3e0439dc861b68fc Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7d5c3e0439dc861b68fc@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 3 PID: 5031 at fs/buffer.c:1113 mark_buffer_dirty+0x488/0x5d0 fs/buffer.c:1113 Modules linked in: CPU: 3 PID: 5031 Comm: jbd2/sda1-8 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:mark_buffer_dirty+0x488/0x5d0 fs/buffer.c:1113 Code: c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 8b 3b be 04 00 00 00 e8 b8 ac fc ff 5b 5d 41 5c 41 5d e9 2d 9d a2 ff e8 28 9d a2 ff <0f> 0b e9 bf fb ff ff e8 1c 9d a2 ff 0f 0b e9 e3 fb ff ff e8 10 9d RSP: 0018:ffffc9000df3fa20 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888017d0b698 RCX: 0000000000000000 RDX: ffff888014b420c0 RSI: ffffffff81d039a8 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81d03565 R11: 0000000000000000 R12: ffff888017d0b698 R13: ffff88801ad9e980 R14: ffff888022e8ea50 R15: ffff888022e8ea50 FS: 0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557ba7d6b967 CR3: 000000000ba8e000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __jbd2_journal_temp_unlink_buffer+0x3ba/0x500 fs/jbd2/transaction.c:2021 __jbd2_journal_unfile_buffer+0x60/0xb0 fs/jbd2/transaction.c:2035 __jbd2_journal_refile_buffer+0x3d2/0x4a0 fs/jbd2/transaction.c:2581 jbd2_journal_commit_transaction+0x43ef/0x6b90 fs/jbd2/commit.c:1084 kjournald2+0x1d0/0x930 fs/jbd2/journal.c:213 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.