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 ]------------
WARNING: CPU: 0 PID: 5327 at fs/udf/inode.c:2088 __udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Modules linked in:
CPU: 0 UID: 0 PID: 5327 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~bpo12+1 04/01/2014
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2087
Code: 27 e9 fe 49 8b 3e 4c 89 e6 e8 08 1b 0c ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 8d d9 81 fe 90 <0f> 0b 90 e9 14 fc ff ff e8 7f d9 81 fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc9000d3b7160 EFLAGS: 00010283
RAX: ffffffff833e39c3 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9000dfd2000 RSI: 0000000000000731 RDI: 0000000000000732
RBP: 1ffff92001a76eb1 R08: ffff88801f012480 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: 00000000000000bf R14: ffffc9000d3b7580 R15: ffffc9000d3b7588
FS:  00007f051bc946c0(0000) GS:ffff88808d72d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f33a9c000 CR3: 0000000041efc000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2145 [inline]
 udf_do_extend_file+0x8cc/0x1180 fs/udf/inode.c:591
 inode_getblk fs/udf/inode.c:843 [inline]
 udf_map_block+0xff2/0x45f0 fs/udf/inode.c:454
 __udf_get_block+0x52/0x250 fs/udf/inode.c:468
 __block_write_begin_int+0x6b5/0x1900 fs/buffer.c:2145
 block_write_begin+0x8a/0x120 fs/buffer.c:2256
 udf_write_begin+0x115/0x270 fs/udf/inode.c:262
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4255
 udf_file_write_iter+0x2d5/0x6c0 fs/udf/file.c:111
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_sys_pwritev2 fs/read_write.c:1211 [inline]
 __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f051ad8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f051bc94038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f051afe5fa0 RCX: 00007f051ad8f7c9
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000008
RBP: 00007f051ae13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f051afe6038 R14: 00007f051afe5fa0 R15: 00007fff7908ff68
 </TASK>