BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 80000000777cd067 P4D 80000000777cd067 PUD 22694067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 7724 Comm: syz.7.226 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #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:ffffc9000b6f6f98 EFLAGS: 00010246
RAX: 1ffffffff1832270 RBX: ffffffff8c191380 RCX: 0000000000080000
RDX: 0000000000000000 RSI: ffff888055322bc0 RDI: ffff88805bf3c018
RBP: ffffc9000b6f70b0 R08: ffffffff82128453 R09: 1ffffffff34867f3
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888055322bc0 R14: 1ffff1100aa64578 R15: 1ffff920016dedf8
FS:  00007f11d4da46c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002e586000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1791
 lookup_slow fs/namei.c:1808 [inline]
 lookup_one_unlocked+0x1a4/0x290 fs/namei.c:2966
 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+0x28c/0x3f0 fs/namei.c:1791
 lookup_slow+0x53/0x70 fs/namei.c:1808
 walk_component fs/namei.c:2112 [inline]
 link_path_walk+0x99b/0xea0 fs/namei.c:2477
 path_openat+0x266/0x3590 fs/namei.c:3983
 do_filp_open+0x27f/0x4e0 fs/namei.c:4014
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_open fs/open.c:1425 [inline]
 __se_sys_open fs/open.c:1421 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1421
 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: 0033:0x7f11d3f7e819
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:00007f11d4da4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f11d4135fa0 RCX: 00007f11d3f7e819
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007f11d3ff175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f11d4135fa0 R15: 00007fff28081718
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000b6f6f98 EFLAGS: 00010246
RAX: 1ffffffff1832270 RBX: ffffffff8c191380 RCX: 0000000000080000
RDX: 0000000000000000 RSI: ffff888055322bc0 RDI: ffff88805bf3c018
RBP: ffffc9000b6f70b0 R08: ffffffff82128453 R09: 1ffffffff34867f3
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888055322bc0 R14: 1ffff1100aa64578 R15: 1ffff920016dedf8
FS:  00007f11d4da46c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002e586000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400