loop0: detected capacity change from 0 to 128
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
loop0: detected capacity change from 128 to 127
------------[ 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.0.0/5319
Modules linked in:
CPU: 0 UID: 0 PID: 5319 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 a1 55 fd fe 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8c 9c 54 08 cc e8 66 7b 67 fe 90 <0f> 0b 90 e9 0d fc ff ff e8 58 7b 67 fe 90 0f 0b 90 e9 5f fd ff ff
RSP: 0018:ffffc9000f3471c0 EFLAGS: 00010283
RAX: ffffffff835ec99a RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000000928 RDI: 0000000000000929
RBP: 1ffff92001e68eb9 R08: ffff888000dd8000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc9000f3475c0 R15: ffffc9000f3475c8
FS:  00007eff13fc06c0(0000) GS:ffff88808c848000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c3b551000 CR3: 0000000012951000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2143 [inline]
 udf_do_extend_file+0x909/0x11e0 fs/udf/inode.c:590
 inode_getblk fs/udf/inode.c:842 [inline]
 udf_map_block+0xfc0/0x4280 fs/udf/inode.c:453
 __udf_get_block+0x52/0x250 fs/udf/inode.c:467
 __block_write_begin_int+0x6c2/0x1900 fs/buffer.c:2123
 block_write_begin+0x8d/0x120 fs/buffer.c:2234
 udf_write_begin+0x118/0x270 fs/udf/inode.c:261
 generic_perform_write+0x2d5/0x8f0 mm/filemap.c:4363
 udf_file_write_iter+0x2e8/0x6c0 fs/udf/file.c:112
 do_iter_readv_writev+0x612/0x8c0 fs/read_write.c:-1
 vfs_writev+0x343/0x990 fs/read_write.c:1058
 do_pwritev fs/read_write.c:1154 [inline]
 __do_sys_pwritev2 fs/read_write.c:1212 [inline]
 __se_sys_pwritev2+0x177/0x2a0 fs/read_write.c:1203
 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: 0033:0x7eff1319ce59
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:00007eff13fbffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007eff13415fa0 RCX: 00007eff1319ce59
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007eff13232e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007eff13416038 R14: 00007eff13415fa0 R15: 00007fff68c76ab8
 </TASK>