------------[ cut here ]------------
WARNING: CPU: 0 PID: 4277 at fs/nilfs2/dat.c:200 nilfs_dat_commit_end+0x5ac/0x6b0 fs/nilfs2/dat.c:200
Modules linked in:
CPU: 0 PID: 4277 Comm: kworker/u4:7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:nilfs_dat_commit_end+0x5ac/0x6b0 fs/nilfs2/dat.c:200
Code: 8b 34 24 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b8 54 03 00 e8 73 5a 6a fe e8 7e b6 f1 fd e9 b8 fc ff ff e8 64 5a 6a fe <0f> 0b e9 16 fc ff ff e8 58 5a 6a fe e8 63 b6 f1 fd e9 74 fe ff ff
RSP: 0018:ffffc900042eebf8 EFLAGS: 00010293
RAX: ffffffff830ec6ac RBX: ffff8880224b31a0 RCX: ffff88802383bb80
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000009000002
RBP: 0000000000000003 R08: ffff88806024365f R09: 1ffff1100c0486cb
R10: dffffc0000000000 R11: ffffed100c0486cc R12: ffff88802383d308
R13: ffff888023cff980 R14: 0000000009000002 R15: ffff88807623cb30
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcbeeccb50c CR3: 00000000632f2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_dat_commit_update+0x24/0x40 fs/nilfs2/dat.c:250
 nilfs_btree_commit_update_v+0x93/0x410 fs/nilfs2/btree.c:1960
 nilfs_btree_commit_propagate_v fs/nilfs2/btree.c:2033 [inline]
 nilfs_btree_propagate_v fs/nilfs2/btree.c:2066 [inline]
 nilfs_btree_propagate+0x95a/0xcf0 fs/nilfs2/btree.c:2110
 nilfs_bmap_propagate+0x70/0x120 fs/nilfs2/bmap.c:345
 nilfs_collect_file_data+0x4b/0xc0 fs/nilfs2/segment.c:587
 nilfs_segctor_apply_buffers+0x15d/0x320 fs/nilfs2/segment.c:1049
 nilfs_segctor_scan_file_dsync fs/nilfs2/segment.c:1138 [inline]
 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1292 [inline]
 nilfs_segctor_collect fs/nilfs2/segment.c:1534 [inline]
 nilfs_segctor_do_construct+0x189a/0x6ca0 fs/nilfs2/segment.c:2090
 nilfs_construct_dsync_segment+0x5f1/0x6f0 fs/nilfs2/segment.c:2375
 do_writepages+0x476/0x6e0 mm/page-writeback.c:2386
 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1657
 writeback_sb_inodes+0xa4e/0x1680 fs/fs-writeback.c:1940
 wb_writeback+0x45d/0xbe0 fs/fs-writeback.c:2114
 wb_do_writeback fs/fs-writeback.c:2257 [inline]
 wb_workfn+0x43a/0xf20 fs/fs-writeback.c:2298
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>