Re: [syzbot] [udf?] WARNING in udf_open_lvid

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    390d73adf896 Merge tag 'for-v7.2' of git://git.kernel.org/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=116014d0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=569f5d5519e8bac8
dashboard link: https://syzkaller.appspot.com/bug?extid=0306b38d9ed6ef71467d
compiler:       Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=138d0d66580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=110316fe580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-390d73ad.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3cb386497ebc/vmlinux-390d73ad.xz
kernel image: https://storage.googleapis.com/syzbot-assets/333ffabcead8/bzImage-390d73ad.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/1889472fa816/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0306b38d9ed6ef71467d@xxxxxxxxxxxxxxxxxxxxxxxxx

Buffer I/O error on dev loop0, logical block 128, lost sync page write
Buffer I/O error on dev loop0, logical block 128, lost sync page write
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1093 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093, CPU#0: syz.0.17/5507
Modules linked in:
CPU: 0 UID: 0 PID: 5507 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:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093
Code: 4c 89 f7 e8 89 39 d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 d4 5e fb ff e8 4f 21 6a ff eb 8c e8 48 21 6a ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 3a 21 6a ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc90002c9fbd0 EFLAGS: 00010293
RAX: ffffffff825c23b8 RBX: ffff888043a54ee0 RCX: ffff88803ed24a80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002c9fc01 R08: ffff888043a54ee7 R09: 1ffff1100874a9dc
R10: dffffc0000000000 R11: ffffed100874a9dd R12: ffff888043a54ee0
R13: ffff88804cc8300b R14: dffffc0000000000 R15: ffff88804cc83004
FS:  000055555d97a500(0000) GS:ffff88808c848000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b73471c138 CR3: 0000000040090000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_open_lvid+0x369/0x5b0 fs/udf/super.c:2092
 udf_reconfigure+0x336/0x540 fs/udf/super.c:679
 reconfigure_super+0x232/0x8f0 fs/super.c:1020
 vfs_cmd_reconfigure fs/fsopen.c:268 [inline]
 vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:297
 __do_sys_fsconfig fs/fsopen.c:463 [inline]
 __se_sys_fsconfig+0x6b9/0x810 fs/fsopen.c:350
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7a1b9ce59
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:00007ffcc3519a48 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fc7a1e15fa0 RCX: 00007fc7a1b9ce59
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007fc7a1c32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7a1e15fac R14: 00007fc7a1e15fa0 R15: 00007fc7a1e15fa0
 </TASK>


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