loop0: detected capacity change from 0 to 2048
UDF-fs: error (device loop0): udf_process_sequence: Primary Volume Descriptor not found!
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
------------[ cut here ]------------
le32_to_cpu(aed->lengthAllocDescs) != epos->offset - sizeof(struct allocExtDesc)
WARNING: fs/udf/inode.c:2088 at __udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087, CPU#1: syz.0.17/5995
Modules linked in:
CPU: 1 UID: 0 PID: 5995 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Code: 62 dc fe 49 8b 3e 4c 89 e6 e8 68 5c 02 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 2d 3a 72 fe 90 <0f> 0b 90 e9 14 fc ff ff e8 1f 3a 72 fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc90003b77748 EFLAGS: 00010293
RAX: ffffffff83536833 RBX: dffffc0000000000 RCX: ffff88802ae99e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001d0
RBP: 1ffff9200076ef55 R08: ffff88802ae99e40 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000001d0
R13: 0000000000000000 R14: ffffc90003b77aa0 R15: ffffc90003b77aa8
FS:  0000555572e72500(0000) GS:ffff888125560000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f863fff CR3: 000000002b0d6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x609/0x800 fs/udf/inode.c:2050
 udf_add_aext fs/udf/inode.c:2140 [inline]
 udf_do_extend_file+0x8a5/0x11e0 fs/udf/inode.c:591
 udf_extend_file fs/udf/inode.c:712 [inline]
 udf_setsize+0xbf3/0x10b0 fs/udf/inode.c:1300
 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: 0033:0x7ff5a7d9bf79
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:00007ffdc9391f18 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007ff5a8015fa0 RCX: 00007ff5a7d9bf79
RDX: 0000000000000000 RSI: 000002400000f000 RDI: 0000200000000c00
RBP: 00007ff5a7e327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff5a8015fac R14: 00007ff5a8015fa0 R15: 00007ff5a8015fa0
 </TASK>