------------[ cut here ]------------
iinfo->i_lenAlloc != epos->offset - udf_file_entry_alloc_offset(inode)
WARNING: fs/udf/inode.c:2084 at __udf_add_aext+0x540/0x6d0, CPU#1: syz.1.62/6268
Modules linked in:
CPU: 1 UID: 0 PID: 6268 Comm: syz.1.62 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__udf_add_aext+0x540/0x6d0
Code: 5f 5d c3 cc cc cc cc cc e8 1d f1 71 fe 90 0f 0b 90 e9 14 fc ff ff e8 0f f1 71 fe 90 0f 0b 90 e9 66 fd ff ff e8 01 f1 71 fe 90 <0f> 0b 90 e9 50 fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c f7
RSP: 0018:ffffc9000613ec80 EFLAGS: 00010283
RAX: ffffffff8353afdf RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900086fb000 RSI: 000000000000086c RDI: 000000000000086d
RBP: 0000000000000020 R08: ffff88810adb1d40 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffc9000613f0a0 R15: 0000000000000000
FS:  00007f4f494916c0(0000) GS:ffff8882a9460000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002398 CR3: 000000010ff24000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 udf_do_extend_file+0x5a8/0x11e0
 udf_map_block+0xfff/0x4330
 __udf_get_block+0x52/0x250
 __blockdev_direct_IO+0x15d7/0x32f0
 udf_direct_IO+0x139/0x200
 generic_file_direct_write+0x1db/0x3e0
 __generic_file_write_iter+0x11d/0x230
 udf_file_write_iter+0x2ca/0x6b0
 iter_file_splice_write+0x9a1/0x10f0
 direct_splice_actor+0x101/0x160
 splice_direct_to_actor+0x53a/0xc70
 do_splice_direct+0x195/0x290
 do_sendfile+0x535/0x7d0
 __se_sys_sendfile64+0x144/0x1a0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f4859c799
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:00007f4f49491028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4f48815fa0 RCX: 00007f4f4859c799
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f4f48632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f48816038 R14: 00007f4f48815fa0 R15: 00007ffcd8156e88
 </TASK>
