------------[ cut here ]------------
WARNING: CPU: 0 PID: 28121 at fs/nilfs2/btree.c:2283 nilfs_btree_assign+0xab6/0xd20
Modules linked in:
CPU: 0 PID: 28121 Comm: segctord Not tainted 6.4.0-rc4-syzkaller-00031-g8b817fded42d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:nilfs_btree_assign+0xab6/0xd20 fs/nilfs2/btree.c:2283
Code: 00 0f 85 7e 02 00 00 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c6 4f 3e fe 4c 8b 7c 24 38 eb a6 e8 ba 4f 3e 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:ffffc9000c7bf580 EFLAGS: 00010293
RAX: ffffffff834d2d66 RBX: ffff888036e44028 RCX: ffff888019ed8000
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000fffffffe
RBP: ffffc9000c7bf6b0 R08: ffffffff834d26ab R09: ffffed1010c612af
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880218e0f00 R14: 00000000fffffffe R15: 1ffff920018f7ec0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555a1c848 CR3: 0000000088563000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_bmap_assign+0x8b/0x160 fs/nilfs2/bmap.c:390
 nilfs_segctor_update_payload_blocknr fs/nilfs2/segment.c:1617 [inline]
 nilfs_segctor_assign fs/nilfs2/segment.c:1651 [inline]
 nilfs_segctor_do_construct+0x37aa/0x6d30 fs/nilfs2/segment.c:2081
 nilfs_segctor_construct+0x145/0x8c0 fs/nilfs2/segment.c:2404
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2512 [inline]
 nilfs_segctor_thread+0x53a/0x1140 fs/nilfs2/segment.c:2595
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>