BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 800000006db65067 P4D 800000006db65067 PUD 78ded067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 13711 Comm: syz.1.806 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000bcd7558 EFLAGS: 00010246
RAX: 1ffffffff1831e80 RBX: ffffffff8c18f400 RCX: 0000000000040000
RDX: 0000000000000000 RSI: ffff88805c583318 RDI: ffff88805730ca58
RBP: ffffc9000bcd7670 R08: ffffffff82113e13 R09: 1ffffffff3482804
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88805c583318 R14: 1ffff1100b8b0663 R15: 1ffff9200179aeb0
FS:  00007fe7f23f06c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000075776000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1732
 lookup_slow fs/namei.c:1749 [inline]
 lookup_one_unlocked+0x1a4/0x290 fs/namei.c:2912
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:210 [inline]
 ovl_lookup_single+0x200/0xbd0 fs/overlayfs/namei.c:240
 ovl_lookup_layer+0x417/0x510 fs/overlayfs/namei.c:333
 ovl_lookup+0xcf7/0x2a60 fs/overlayfs/namei.c:1124
 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1633
 filename_create+0x297/0x540 fs/namei.c:4027
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4272
 __do_sys_mkdirat fs/namei.c:4295 [inline]
 __se_sys_mkdirat fs/namei.c:4293 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7f157e719
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7f23f0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fe7f1735f80 RCX: 00007fe7f157e719
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007fe7f15f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe7f1735f80 R15: 00007ffff7bb1198
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000bcd7558 EFLAGS: 00010246
RAX: 1ffffffff1831e80 RBX: ffffffff8c18f400 RCX: 0000000000040000
RDX: 0000000000000000 RSI: ffff88805c583318 RDI: ffff88805730ca58
RBP: ffffc9000bcd7670 R08: ffffffff82113e13 R09: 1ffffffff3482804
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88805c583318 R14: 1ffff1100b8b0663 R15: 1ffff9200179aeb0
FS:  00007fe7f23f06c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000075776000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400