------------[ cut here ]------------
WARNING: fs/udf/truncate.c:224 at udf_truncate_extents+0xd4c/0xec0, CPU#1: syz.6.1841/10820
Modules linked in:
CPU: 1 UID: 0 PID: 10820 Comm: syz.6.1841 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: 59 84 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 c3 cc cc cc cc cc e8 75 74 82 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: 0000:ffffc90007996800 EFLAGS: 00010293
RAX: ffffffff833de6ab RBX: 1ffff110206e9658 RCX: ffff88811b553a00
RDX: 0000000000000000 RSI: 0000000000000120 RDI: 0000000000000000
RBP: ffffc900079969d8 R08: ffff88811b553a00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000120 R15: 0000000000000120
FS:  00007f7ec55ef6c0(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000030 CR3: 0000000126e8e000 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
 __kernel_write_iter+0x428/0x910
 __kernel_write+0xef/0x150
 __dump_emit+0x206/0x310
 elf_core_dump+0x2d05/0x3960
 coredump_write+0x116c/0x1900
 vfs_coredump+0x1db5/0x2a60
 get_signal+0x1108/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 irqentry_exit_to_user_mode+0x7e/0x110
 exc_page_fault+0xab/0x100
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f7ec478ec31
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000000000000030 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f7ec49d5fa0 RCX: 00007f7ec478ec29
RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000600
RBP: 00007f7ec4811e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f7ec49d6038 R14: 00007f7ec49d5fa0 R15: 00007ffd73647a48
 </TASK>
