==================================================================
BUG: KASAN: null-ptr-deref in udf_write_fi+0x384/0xf20 fs/udf/namei.c:91
Write of size 18446744073709551572 at addr 0000000000000020 by task syz-executor.3/6464

CPU: 0 PID: 6464 Comm: syz-executor.3 Not tainted 6.1.0-rc6-syzkaller-00012-g4312098baf37 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x141/0x190 mm/kasan/generic.c:189
 memset+0x24/0x50 mm/kasan/shadow.c:44
 udf_write_fi+0x384/0xf20 fs/udf/namei.c:91
 udf_rename+0xda3/0x1250 fs/udf/namei.c:1173
 vfs_rename+0x1162/0x1a90 fs/namei.c:4778
 do_renameat2+0xb62/0xc90 fs/namei.c:4929
 __do_sys_rename fs/namei.c:4975 [inline]
 __se_sys_rename fs/namei.c:4973 [inline]
 __x64_sys_rename+0x81/0xa0 fs/namei.c:4973
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4104c8c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4103fff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f4104dabf80 RCX: 00007f4104c8c0d9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 00000000200002c0
RBP: 00007f4103fff1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffcb3ce133f R14: 00007f4103fff300 R15: 0000000000022000
 </TASK>
==================================================================