[syzbot] [udf?] WARNING in udf_new_block (2)

[syzbot <syzbot+e8cf1c2a389352f54126@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    7c6c4ed80b87 Merge tag 'vfs-7.0-rc8.fixes' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1679fbd6580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d46eab0cfd31c214
dashboard link: https://syzkaller.appspot.com/bug?extid=e8cf1c2a389352f54126
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-7c6c4ed8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c8457f50ff92/vmlinux-7c6c4ed8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e5a1d8ae449e/bzImage-7c6c4ed8.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e8cf1c2a389352f54126@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 1024
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
UDF-fs: warning (device loop0): udf_update_inode: IO error syncing udf inode [00000347]
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1180 at mark_buffer_dirty+0x299/0x440 fs/buffer.c:1180, CPU#0: syz.0.0/5318
Modules linked in:
CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 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:mark_buffer_dirty+0x299/0x440 fs/buffer.c:1180
Code: 4c 89 f7 e8 e9 fc d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 c4 60 fb ff e8 7f 1c 6e ff eb 8c e8 78 1c 6e ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 6a 1c 6e ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000e32f5d0 EFLAGS: 00010283
RAX: ffffffff8257b318 RBX: ffff888047e2ebc8 RCX: 0000000000100000
RDX: ffffc9000eb62000 RSI: 0000000000000a57 RDI: 0000000000000a58
RBP: ffffc9000e32f801 R08: ffff888047e2ebcf R09: 1ffff11008fc5d79
R10: dffffc0000000000 R11: ffffed1008fc5d7a R12: ffff8880126e8000
R13: 00000000000000bf R14: 000000000000017f R15: ffffc9000e32f950
FS:  00007f14e25e06c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14d560fe00 CR3: 0000000041faa000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_bitmap_new_block fs/udf/balloc.c:347 [inline]
 udf_new_block+0x183b/0x1c70 fs/udf/balloc.c:721
 udf_add_aext fs/udf/inode.c:2131 [inline]
 udf_do_extend_file+0x878/0x11e0 fs/udf/inode.c:588
 udf_extend_file fs/udf/inode.c:709 [inline]
 udf_setsize+0xbf3/0x10b0 fs/udf/inode.c:1297
 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:238
 notify_change+0xc1a/0xf40 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 vfs_truncate+0x4b4/0x540 fs/open.c:118
 do_sys_truncate+0xf3/0x1c0 fs/open.c:142
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 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: 0033:0x7f14e179c819
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:00007f14e25dffe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f14e1a15fa0 RCX: 00007f14e179c819
RDX: 0000000000000000 RSI: 00000020fdfffffe RDI: 0000200000000100
RBP: 00007f14e1832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f14e1a16038 R14: 00007f14e1a15fa0 R15: 00007ffe7a99f7e8
 </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 syzkaller@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