[syzbot] [nilfs?] WARNING in nilfs_btree_mark

Hello,

syzbot found the following issue on:

HEAD commit:    f0caa1d49cc0 Merge tag 'hid-for-linus-2026031701' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12d868da580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d46eab0cfd31c214
dashboard link: https://syzkaller.appspot.com/bug?extid=98a040252119df0506f8
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1452974a580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f0caa1d4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/790e2ce16030/vmlinux-f0caa1d4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dcb6a5644f0c/bzImage-f0caa1d4.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/93d9925377df/mount_1.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

------------[ cut here ]------------
ret == -ENOENT
WARNING: fs/nilfs2/btree.c:2356 at nilfs_btree_mark+0x1c9/0x210 fs/nilfs2/btree.c:2356, CPU#0: syz.0.17/5469
Modules linked in:
CPU: 0 UID: 0 PID: 5469 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:nilfs_btree_mark+0x1c9/0x210 fs/nilfs2/btree.c:2356
Code: 48 8b 05 4a f8 6e 0f 48 3b 44 24 10 75 26 89 e8 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 88 f8 17 fe 90 <0f> 0b 90 bd fe ff ff ff eb c3 e8 58 99 02 08 44 89 f1 80 e1 07 80
RSP: 0018:ffffc90003d375b0 EFLAGS: 00010293
RAX: ffffffff83adb7f8 RBX: ffff888042014000 RCX: ffff888040904980
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000fffffffe
RBP: 00000000fffffffe R08: 000000000000000e R09: 0000000000000000
R10: ffff888042014678 R11: ffffed10084028d3 R12: ffff8880464286a0
R13: dffffc0000000000 R14: ffff888046428668 R15: 0000000000000009
FS:  00007f5bd0f206c0(0000) GS:ffff88808ca55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab839e8000 CR3: 0000000033512000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 nilfs_bmap_mark+0xba/0x180 fs/nilfs2/bmap.c:402
 nilfs_ioctl_mark_blocks_dirty fs/nilfs2/ioctl.c:764 [inline]
 nilfs_ioctl_prepare_clean_segments+0x49a/0x800 fs/nilfs2/ioctl.c:799
 nilfs_clean_segments+0x18c/0xa50 fs/nilfs2/segment.c:2525
 nilfs_ioctl_clean_segments fs/nilfs2/ioctl.c:916 [inline]
 nilfs_ioctl+0x261f/0x2780 fs/nilfs2/ioctl.c:1346
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5bcff9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5bd0f20028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5bd0215fa0 RCX: 00007f5bcff9c799
RDX: 0000200000000640 RSI: 0000000040786e88 RDI: 0000000000000004
RBP: 00007f5bd0032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5bd0216038 R14: 00007f5bd0215fa0 R15: 00007ffdf65e5358
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup