BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1ceb8067 P4D 1ceb8067 PUD 2a2a4067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 10990 Comm: syz.8.1251 Not tainted 6.12.0-rc7-syzkaller-00216-gf66d6acccbc0 #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:ffffc90003e5f558 EFLAGS: 00010246
RAX: 1ffffffff18320f0 RBX: ffffffff8c190780 RCX: 0000000000040000
RDX: 0000000000000000 RSI: ffff88806040d8f8 RDI: ffff88805e9d4538
RBP: ffffc90003e5f670 R08: ffffffff821463a3 R09: 1ffffffff34895c5
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88806040d8f8 R14: 1ffff1100c081b1f R15: 1ffff920007cbeb0
FS:  00007f54699f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000066fa2000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __lookup_slow+0x28e/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+0x121/0x260 fs/namei.c:1633
 filename_create+0x297/0x540 fs/namei.c:4027
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4272
 __do_sys_mkdir fs/namei.c:4300 [inline]
 __se_sys_mkdir fs/namei.c:4298 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4298
 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: 0033:0x7f546b57e719
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:00007f54699f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f546b736058 RCX: 00007f546b57e719
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000020000440
RBP: 00007f546b5f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f546b736058 R15: 00007ffce3857c78
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90003e5f558 EFLAGS: 00010246
RAX: 1ffffffff18320f0 RBX: ffffffff8c190780 RCX: 0000000000040000
RDX: 0000000000000000 RSI: ffff88806040d8f8 RDI: ffff88805e9d4538
RBP: ffffc90003e5f670 R08: ffffffff821463a3 R09: 1ffffffff34895c5
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88806040d8f8 R14: 1ffff1100c081b1f R15: 1ffff920007cbeb0
FS:  00007f54699f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000066fa2000 CR4: 0000000000350ef0