------------[ cut here ]------------
le32_to_cpu(aed->lengthAllocDescs) != epos->offset - sizeof(struct allocExtDesc)
WARNING: fs/udf/inode.c:2085 at __udf_add_aext+0x68c/0x800 fs/udf/inode.c:2085, CPU#1: syz.1.31/5930
Modules linked in:
CPU: 1 UID: 0 PID: 5930 Comm: syz.1.31 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__udf_add_aext+0x68c/0x800 fs/udf/inode.c:2085
Code: 6c fe 48 8b 7c 24 08 be 18 00 00 00 e8 ed bd 02 00 e9 2c fe ff ff e8 83 02 6c fe 90 0f 0b 90 e9 a0 fb ff ff e8 75 02 6c fe 90 <0f> 0b 90 e9 23 fb ff ff bb fb ff ff ff e9 38 fe ff ff e8 4d c6 d8
RSP: 0018:ffffc900042a6fa8 EFLAGS: 00010283
RAX: 00000000000019d3 RBX: ffff8880781faeb8 RCX: ffffc900101d1000
RDX: 0000000000080000 RSI: ffffffff839c784b RDI: ffff88807ee1bd80
RBP: ffffc900042a7380 R08: 0000000000000006 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000010 R14: 0000000000000018 R15: ffffc900042a7388
FS:  00007f73a36a36c0(0000) GS:ffff888124476000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f730414da08 CR3: 000000004ed87000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_add_aext+0x23a/0x2e0 fs/udf/inode.c:2143
 udf_do_extend_file+0x3cf/0x8a0 fs/udf/inode.c:590
 inode_getblk+0x117d/0x41b0 fs/udf/inode.c:842
 udf_map_block+0x2dd/0x5c0 fs/udf/inode.c:453
 __udf_get_block+0x98/0x330 fs/udf/inode.c:467
 __block_write_begin_int+0x57a/0x19c0 fs/buffer.c:2042
 block_write_begin+0x9d/0x1d0 fs/buffer.c:2153
 udf_write_begin+0x217/0x300 fs/udf/inode.c:261
 generic_perform_write+0x292/0xa40 mm/filemap.c:4325
 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4442
 udf_file_write_iter+0x231/0x780 fs/udf/file.c:112
 aio_write+0x3ba/0x920 fs/aio.c:1688
 __io_submit_one fs/aio.c:2060 [inline]
 io_submit_one+0x1142/0x1fb0 fs/aio.c:2107
 __do_sys_io_submit fs/aio.c:2166 [inline]
 __se_sys_io_submit fs/aio.c:2136 [inline]
 __x64_sys_io_submit+0x1b1/0x3a0 fs/aio.c:2136
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f73a279cdd9
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:00007f73a36a3028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f73a2a16090 RCX: 00007f73a279cdd9
RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f73a367a000
RBP: 00007f73a2832d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73a2a16128 R14: 00007f73a2a16090 R15: 00007ffca1d36888
 </TASK>