------------[ 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#0: syz.3.274/7253
Modules linked in:
CPU: 0 UID: 0 PID: 7253 Comm: syz.3.274 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Code: 72 e0 fe 49 8b 3e 4c 89 e6 e8 18 92 05 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7e ef c3 fd cc e8 bd 25 78 fe 90 <0f> 0b 90 e9 14 fc ff ff e8 af 25 78 fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc9000392f728 EFLAGS: 00010283
RAX: ffffffff834c5193 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000ded2000 RSI: 00000000000105f1 RDI: 00000000000105f2
RBP: 1ffff92000725f51 R08: ffff888024e23d00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000001d0
R13: 0000000000000000 R14: ffffc9000392fa80 R15: ffffc9000392fa88
FS:  00007f65acdf66c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65acdf5ff8 CR3: 0000000031925000 CR4: 0000000000350ef0
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:236
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1c2/0x250 fs/open.c:68
 vfs_truncate+0x4b4/0x540 fs/open.c:118
 do_sys_truncate+0xf1/0x1c0 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:151
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65aeb9aeb9
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:00007f65acdf6028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f65aee16090 RCX: 00007f65aeb9aeb9
RDX: 0000000000000000 RSI: 0000040000000000 RDI: 00002000000000c0
RBP: 00007f65aec08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f65aee16128 R14: 00007f65aee16090 R15: 00007ffffbc0c558
 </TASK>