[v6.1] WARNING in udf_free_inode

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3db754f56897 Linux 6.1.152
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12100762580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7eb38bd5021fec61
dashboard link: https://syzkaller.appspot.com/bug?extid=2af01ee0217f5f385b68
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/662de00db314/disk-3db754f5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/74288f70f46c/vmlinux-3db754f5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ab4512d1fabb/bzImage-3db754f5.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2af01e...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 7921 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
WARNING: CPU: 0 PID: 7921 at fs/udf/udfdecl.h:127 udf_free_inode+0x21c/0x2d0 fs/udf/ialloc.c:41
Modules linked in:
CPU: 0 PID: 7921 Comm: syz.4.588 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
RIP: 0010:udf_free_inode+0x21c/0x2d0 fs/udf/ialloc.c:41
Code: ff ff 4c 89 f7 31 f6 48 89 da 31 c9 41 b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 e9 89 ff ff e8 54 4d 9e fe <0f> 0b e9 74 ff ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 72 fe ff ff
RSP: 0000:ffffc90006157c70 EFLAGS: 00010283
RAX: ffffffff82e2833c RBX: ffff888054f32160 RCX: 0000000000080000
RDX: ffffc9001247f000 RSI: 0000000000003303 RDI: 0000000000003304
RBP: 00000000fdcdc6b7 R08: dffffc0000000000 R09: fffffbfff1c3eea6
R10: fffffbfff1c3eea6 R11: 1ffffffff1c3eea5 R12: 1ffff1100f2da4cf
R13: ffff888049b3501c R14: dffffc0000000000 R15: ffff8880796d2678
FS: 00007f83439d16c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83439d0f98 CR3: 0000000056320000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000600 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
evict+0x485/0x870 fs/inode.c:705
do_unlinkat+0x377/0x560 fs/namei.c:4397
__do_sys_unlink fs/namei.c:4438 [inline]
__se_sys_unlink fs/namei.c:4436 [inline]
__x64_sys_unlink+0x45/0x50 fs/namei.c:4436
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8345f8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f83439d1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f83461d6360 RCX: 00007f8345f8eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007f8346011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83461d63f8 R14: 00007f83461d6360 R15: 00007ffe099a9208
</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 syzk...@googlegroups.com.

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 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