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BUG: KASAN: null-ptr-deref in udf_write_fi+0x493/0xc10
Write of size 18446744073709551572 at addr 0000000000000020 by task syz-executor.2/28725

CPU: 0 PID: 28725 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_report+0xed/0x1f0 mm/kasan/report.c:398
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189
 memset+0x1f/0x40 mm/kasan/shadow.c:44
 udf_write_fi+0x493/0xc10
 udf_delete_entry fs/udf/namei.c:577 [inline]
 udf_rename+0x90c/0x15f0 fs/udf/namei.c:1173
 vfs_rename+0xd53/0x1130 fs/namei.c:4778
 do_renameat2+0xb53/0x1370 fs/namei.c:4929
 __do_sys_rename fs/namei.c:4975 [inline]
 __se_sys_rename fs/namei.c:4973 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:4973
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f616368b5f9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f61647bf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f61637abf80 RCX: 00007f616368b5f9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000140
RBP: 00007f61647bf1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe65a0031f R14: 00007f61647bf300 R15: 0000000000022000
 </TASK>
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