loop0: detected capacity change from 0 to 2048
UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
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:2086 at __udf_add_aext+0x52b/0x6e0 fs/udf/inode.c:2085, CPU#0: syz.0.0/5336
Modules linked in:
CPU: 0 UID: 0 PID: 5336 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:__udf_add_aext+0x52b/0x6e0 fs/udf/inode.c:2085
Code: 81 c4 48 ff ff ff 4c 89 e6 e8 01 b4 fe fe 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 06 39 6c fe 90 <0f> 0b 90 e9 0d fc ff ff e8 f8 38 6c fe 90 0f 0b 90 e9 5f fd ff ff
RSP: 0018:ffffc9000fda7248 EFLAGS: 00010283
RAX: ffffffff83598e0a RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9000f3aa000 RSI: 0000000000073aca RDI: 0000000000073acb
RBP: 1ffff92001fb4ee5 R08: ffff88803d220000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000003d0
R13: 0000000000000000 R14: ffffc9000fda7720 R15: ffffc9000fda7728
FS:  00007f0cf2daf6c0(0000) GS:ffff88808c894000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ce5e3f000 CR3: 0000000012c81000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x60d/0x800 fs/udf/inode.c:2048
 udf_add_aext fs/udf/inode.c:2138 [inline]
 udf_do_extend_file+0x8a5/0x11e0 fs/udf/inode.c:590
 inode_getblk fs/udf/inode.c:842 [inline]
 udf_map_block+0xfc9/0x42d0 fs/udf/inode.c:453
 __udf_get_block+0x52/0x250 fs/udf/inode.c:467
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2042
 block_write_begin+0x8d/0x120 fs/buffer.c:2153
 udf_write_begin+0x118/0x270 fs/udf/inode.c:261
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325
 udf_file_write_iter+0x2ca/0x6b0 fs/udf/file.c:112
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x199/0x230 fs/read_write.c:800
 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: 0033:0x7f0cf1f9ce59
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:00007f0cf2daefe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f0cf2215fa0 RCX: 00007f0cf1f9ce59
RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000007
RBP: 00007f0cf2032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0cf2216038 R14: 00007f0cf2215fa0 R15: 00007ffd3ed711d8
 </TASK>