------------[ cut here ]------------
WARNING: CPU: 1 PID: 6505 at fs/buffer.c:1188 mark_buffer_dirty+0x2bb/0x4d0 fs/buffer.c:1188
Modules linked in:
CPU: 1 PID: 6505 Comm: segctord Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:mark_buffer_dirty+0x2bb/0x4d0 fs/buffer.c:1188
Code: 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 ef ac fc ff e8 aa 11 8a ff 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 8a 58 e8 ff e8 95 11 8a ff <0f> 0b e9 84 fd ff ff e8 89 11 8a ff 0f 0b e9 b0 fd ff ff e8 7d 11
RSP: 0018:ffffc900045176f0 EFLAGS: 00010293
RAX: ffffffff81fb7e0b RBX: ffff88807873eae0 RCX: ffff88802dc00000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90004517b01 R08: ffff88807873eae7 R09: 1ffff1100f0e7d5c
R10: dffffc0000000000 R11: ffffed100f0e7d5d R12: 1ffff1100bf2028e
R13: ffff88805f901480 R14: ffff88805fbe8e08 R15: 1ffff1100bf20290
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557f372608 CR3: 000000002c50e000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 nilfs_segctor_collect_dirty_files fs/nilfs2/segment.c:2009 [inline]
 nilfs_segctor_do_construct+0x32c/0x6870 fs/nilfs2/segment.c:2071
 nilfs_segctor_construct+0x17b/0x690 fs/nilfs2/segment.c:2454
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2562 [inline]
 nilfs_segctor_thread+0x4f6/0x1000 fs/nilfs2/segment.c:2646
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>