------------[ cut here ]------------
WARNING: CPU: 0 PID: 5213 at fs/buffer.c:1177 mark_buffer_dirty+0x2e5/0x520 fs/buffer.c:1177
Modules linked in:
CPU: 0 UID: 0 PID: 5213 Comm: segctord Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x2e5/0x520 fs/buffer.c:1177
Code: 89 df e8 fe 84 db ff 48 8b 3b be 20 00 00 00 5b 41 5e 41 5f 5d e9 fb e8 fb ff e8 76 bf 71 ff e9 73 ff ff ff e8 6c bf 71 ff 90 <0f> 0b 90 e9 61 fd ff ff e8 5e bf 71 ff 90 0f 0b 90 e9 88 fd ff ff
RSP: 0018:ffffc9000b1f7758 EFLAGS: 00010293
RAX: ffffffff82231874 RBX: ffff88803e5ef301 RCX: ffff88801cd2c880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff822315d1 R09: 1ffff110084a1a00
R10: dffffc0000000000 R11: ffffed10084a1a01 R12: 1ffff110084a9423
R13: 1ffff110084a9425 R14: ffff88804250d000 R15: ffff88804254a118
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555594e4738 CR3: 000000003d516000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_segctor_collect_dirty_files fs/nilfs2/segment.c:2033 [inline]
 nilfs_segctor_do_construct+0x33e/0x6b90 fs/nilfs2/segment.c:2095
 nilfs_segctor_construct+0x181/0x6b0 fs/nilfs2/segment.c:2479
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2587 [inline]
 nilfs_segctor_thread+0x69e/0xe80 fs/nilfs2/segment.c:2701
 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
 </TASK>