loop3: detected capacity change from 0 to 64
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 7bdb1067 P4D 7bdb1067 PUD 645a8067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 26877 Comm: syz.3.4579 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc90003647318 EFLAGS: 00010246
RAX: 1ffffffff152df28 RBX: ffffffff8a96f940 RCX: 0000000000080000
RDX: 0000000000000000 RSI: ffff88807497eeb0 RDI: ffff8880517a0018
RBP: ffffc90003647430 R08: ffffffff81d86ead R09: fffffbfff2d1a800
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88807497eeb0 R14: 1ffff1100e92fdd6 R15: 1ffff920006c8e68
FS:  00007f47c1fa46c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000246a5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __lookup_slow+0x275/0x3d0 fs/namei.c:1663
 lookup_slow fs/namei.c:1680 [inline]
 lookup_one_unlocked+0x19c/0x280 fs/namei.c:2779
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:205 [inline]
 ovl_lookup_single+0x62/0x840 fs/overlayfs/namei.c:230
 ovl_lookup_layer+0x413/0x510 fs/overlayfs/namei.c:314
 ovl_lookup+0xb77/0x1f10 fs/overlayfs/namei.c:914
 lookup_open fs/namei.c:3440 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x111d/0x2f20 fs/namei.c:3739
 do_filp_open+0x21c/0x460 fs/namei.c:3769
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f47c412c819
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:00007f47c1fa4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f47c42e3fa0 RCX: 00007f47c412c819
RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f47c419f75e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f47c42e3fa0 R15: 00007fffc459a838
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace b8752512013ceba1 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc90003647318 EFLAGS: 00010246

RAX: 1ffffffff152df28 RBX: ffffffff8a96f940 RCX: 0000000000080000
RDX: 0000000000000000 RSI: ffff88807497eeb0 RDI: ffff8880517a0018
RBP: ffffc90003647430 R08: ffffffff81d86ead R09: fffffbfff2d1a800
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88807497eeb0 R14: 1ffff1100e92fdd6 R15: 1ffff920006c8e68
FS:  00007f47c1fa46c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000246a5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400