------------[ cut here ]------------
WARNING: CPU: 0 PID: 5017 at fs/nilfs2/btree.c:2282 nilfs_btree_assign+0xa9b/0xd00
Modules linked in:
CPU: 0 PID: 5017 Comm: segctord Not tainted 6.1.20-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:nilfs_btree_assign+0xa9b/0xd00 fs/nilfs2/btree.c:2282
Code: 00 0f 85 81 02 00 00 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b1 f7 3b fe 4c 8b 7c 24 38 eb a6 e8 a5 f7 3b fe <0f> 0b 41 be fe ff ff ff eb 97 44 89 f1 80 e1 07 80 c1 03 38 c1 0f
RSP: 0018:ffffc9000ba4f580 EFLAGS: 00010293
RAX: ffffffff834e697b RBX: ffff88806984ed00 RCX: ffff8880202e3a80
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000fffffffe
RBP: ffffc9000ba4f6b0 R08: ffffffff834e62d7 R09: ffffed100e4fee3b
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88806669f800 R14: 00000000fffffffe R15: 1ffff92001749ec0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbbe302b000 CR3: 0000000078ef2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_bmap_assign+0x87/0x160 fs/nilfs2/bmap.c:382
 nilfs_segctor_update_payload_blocknr fs/nilfs2/segment.c:1595 [inline]
 nilfs_segctor_assign fs/nilfs2/segment.c:1629 [inline]
 nilfs_segctor_do_construct+0x39c1/0x6f00 fs/nilfs2/segment.c:2056
 nilfs_segctor_construct+0x145/0x8c0 fs/nilfs2/segment.c:2379
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2487 [inline]
 nilfs_segctor_thread+0x536/0x1130 fs/nilfs2/segment.c:2570
 kthread+0x268/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>