------------[ cut here ]------------
WARNING: CPU: 1 PID: 6569 at fs/udf/truncate.c:224 udf_truncate_extents+0xd4c/0xec0
Modules linked in:
CPU: 1 UID: 0 PID: 6569 Comm: syz.0.89 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_truncate_extents+0xd4c/0xec0
Code: 83 67 0f 48 3b 84 24 80 01 00 00 75 77 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 4b ae 43 08 cc e8 35 b1 86 fe 90 <0f> 0b 90 eb 88 44 89 e9 80 e1 07 38 c1 0f 8c e4 f3 ff ff 4c 89 ef
RSP: 0018:ffffc90004d6f8a0 EFLAGS: 00010293
RAX: ffffffff8338fcdb RBX: 1ffff110235378cc RCX: ffff888022add640
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000000
RBP: ffffc90004d6fa78 R08: ffff888022add640 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000000a R15: 000000000000000a
FS:  00007fdafe9f66c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdaf65ff000 CR3: 0000000025e24000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 udf_write_failed+0x185/0x1c0
 udf_write_begin+0x212/0x270
 generic_perform_write+0x2c5/0x900
 udf_file_write_iter+0x2d5/0x6c0
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb0078ebe9
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:00007fdafe9f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdb009c6090 RCX: 00007fdb0078ebe9
RDX: 0000000000001006 RSI: 0000200000000d80 RDI: 0000000000000004
RBP: 00007fdb00811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb009c6128 R14: 00007fdb009c6090 R15: 00007fff438ed9b8
 </TASK>
