------------[ cut here ]------------
WARNING: CPU: 0 PID: 8817 at fs/udf/truncate.c:224 udf_truncate_extents+0xd87/0xef0 fs/udf/truncate.c:224
Modules linked in:
CPU: 0 PID: 8817 Comm: syz.1.907 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:udf_truncate_extents+0xd87/0xef0 fs/udf/truncate.c:224
Code: 65 48 8b 04 25 28 00 00 00 48 3b 84 24 80 01 00 00 75 73 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 19 3b 89 fe <0f> 0b e9 6a ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c e8 f3 ff ff 4c
RSP: 0018:ffffc9000b46eee0 EFLAGS: 00010293
RAX: ffffffff82fde6b7 RBX: 1ffff1100ba23409 RCX: ffff888028939e00
RDX: 0000000000000000 RSI: 0000000000000120 RDI: 0000000000000000
RBP: ffffc9000b46f0c0 R08: ffff888028939e00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000120 R15: 0000000000000120
FS:  00007fecd2d086c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cb3c17dac CR3: 0000000067b93000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 udf_write_failed+0x180/0x1b0 fs/udf/inode.c:178
 udf_write_begin+0x21f/0x420 fs/udf/inode.c:264
 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4031
 udf_file_write_iter+0x2b5/0x610 fs/udf/file.c:111
 __kernel_write_iter+0x28c/0x690 fs/read_write.c:517
 __kernel_write+0x107/0x170 fs/read_write.c:537
 __dump_emit+0x20c/0x320 fs/coredump.c:882
 elf_core_dump+0x2bde/0x3770 fs/binfmt_elf.c:2163
 do_coredump+0x17cc/0x24d0 fs/coredump.c:833
 get_signal+0x1133/0x13f0 kernel/signal.c:2888
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000200000000208 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fecd2016090 RCX: 00007fecd1d9c819
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000200000
RBP: 00007fecd1e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fecd2016128 R14: 00007fecd2016090 R15: 00007ffe155ad408
 </TASK>