BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 2e76e067 P4D 2e76e067 PUD 79337067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 6687 Comm: syz.4.145 Not tainted 6.12.0-rc6-syzkaller-00272-gda4373fbcf00 #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:ffffc9000481f298 EFLAGS: 00010246
RAX: 1ffffffff18320c0 RBX: ffffffff8c190600 RCX: ffff888025ddda00
RDX: 0000000000000000 RSI: ffff88805fbbabc0 RDI: ffff88805d0a0018
RBP: ffffc9000481f3b0 R08: ffffffff821433c3 R09: 1ffffffff3488f0a
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88805fbbabc0 R14: 1ffff1100bf77578 R15: 1ffff92000903e58
FS:  00007f74ea1ef6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000007921c000 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_slow+0x28e/0x3f0 fs/namei.c:1732
 lookup_slow+0x53/0x70 fs/namei.c:1749
 walk_component+0x2e1/0x410 fs/namei.c:2053
 lookup_last fs/namei.c:2556 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2580
 filename_lookup+0x256/0x610 fs/namei.c:2609
 user_path_at+0x3a/0x60 fs/namei.c:3016
 do_mount fs/namespace.c:3844 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x297/0x3c0 fs/namespace.c:4034
 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: 0033:0x7f74e937e719
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:00007f74ea1ef038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f74e9535f80 RCX: 00007f74e937e719
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f74e93f139e R08: 00000000200001c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f74e9535f80 R15: 00007fff674b65b8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000481f298 EFLAGS: 00010246
RAX: 1ffffffff18320c0 RBX: ffffffff8c190600 RCX: ffff888025ddda00
RDX: 0000000000000000 RSI: ffff88805fbbabc0 RDI: ffff88805d0a0018
RBP: ffffc9000481f3b0 R08: ffffffff821433c3 R09: 1ffffffff3488f0a
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88805fbbabc0 R14: 1ffff1100bf77578 R15: 1ffff92000903e58
FS:  00007f74ea1ef6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000007921c000 CR4: 0000000000350ef0