RAX: ffffffffffffffda RBX: 00007f9833150f80 RCX: 00007f9833031b29
RDX: 0000000000000004 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f9832bb4120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000006 R14: 00007f9833150f80 R15: 00007ffe5fe43d48
 </TASK>
==================================================================
BUG: KASAN: null-ptr-deref in udf_write_fi+0x363/0xea0 fs/udf/namei.c:91
Write of size 18446744073709551572 at addr 0000000000000020 by task syz-executor.0/2021

CPU: 0 PID: 2021 Comm: syz-executor.0 Not tainted 5.15.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:438 [inline]
 kasan_report.cold+0x66/0xdf mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 memset+0x20/0x40 mm/kasan/shadow.c:44
 udf_write_fi+0x363/0xea0 fs/udf/namei.c:91
 udf_rename+0x690/0xf80 fs/udf/namei.c:1173
 vfs_rename+0x8ad/0x1880 fs/namei.c:4742
 do_renameat2+0x879/0xa10 fs/namei.c:4892
 __do_sys_renameat fs/namei.c:4932 [inline]
 __se_sys_renameat fs/namei.c:4929 [inline]
 __x64_sys_renameat+0xba/0xf0 fs/namei.c:4929
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9833031b29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9832bb40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000108
RAX: ffffffffffffffda RBX: 00007f9833150f80 RCX: 00007f9833031b29
RDX: 0000000000000004 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f9832bb4120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000006 R14: 00007f9833150f80 R15: 00007ffe5fe43d48
 </TASK>
==================================================================