loop3: detected capacity change from 0 to 8
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 14050 Comm: syz.3.1385 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ovl_iterate_merged fs/overlayfs/readdir.c:856 [inline]
RIP: 0010:ovl_iterate+0x720/0x2320 fs/overlayfs/readdir.c:906
Code: 05 00 00 4c 89 64 24 30 49 83 ed 80 4c 89 6c 24 40 48 8b 44 24 68 48 c1 e8 03 48 89 44 24 58 4d 8d 66 31 4d 89 e5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 36 02 00 00 49 8d 5e e8 41 80 3c 24
RSP: 0018:ffffc900041bf9c0 EFLAGS: 00010216
RAX: 1ffff92000837fc4 RBX: ffff8880313fd208 RCX: 0000000000080000
RDX: ffffc9000d62d000 RSI: 000000000000098c RDI: 000000000000098d
RBP: ffffc900041bfd40 R08: ffffffff8f823077 R09: 1ffffffff1f0460e
R10: dffffc0000000000 R11: fffffbfff1f0460f R12: 0000000000000031
R13: 0000000000000006 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fb93f0436c0(0000) GS:ffff888125e1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa25c771000 CR3: 000000009195c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 wrap_directory_iterator+0x96/0xe0 fs/readdir.c:65
 iterate_dir+0x399/0x570 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:410 [inline]
 __se_sys_getdents64+0xe4/0x260 fs/readdir.c:396
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb93e18f749
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:00007fb93f043038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fb93e3e5fa0 RCX: 00007fb93e18f749
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 000000000000000b
RBP: 00007fb93e213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb93e3e6038 R14: 00007fb93e3e5fa0 R15: 00007ffdb6b35228
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ovl_iterate_merged fs/overlayfs/readdir.c:856 [inline]
RIP: 0010:ovl_iterate+0x720/0x2320 fs/overlayfs/readdir.c:906
Code: 05 00 00 4c 89 64 24 30 49 83 ed 80 4c 89 6c 24 40 48 8b 44 24 68 48 c1 e8 03 48 89 44 24 58 4d 8d 66 31 4d 89 e5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 36 02 00 00 49 8d 5e e8 41 80 3c 24
RSP: 0018:ffffc900041bf9c0 EFLAGS: 00010216
RAX: 1ffff92000837fc4 RBX: ffff8880313fd208 RCX: 0000000000080000
RDX: ffffc9000d62d000 RSI: 000000000000098c RDI: 000000000000098d
RBP: ffffc900041bfd40 R08: ffffffff8f823077 R09: 1ffffffff1f0460e
R10: dffffc0000000000 R11: fffffbfff1f0460f R12: 0000000000000031
R13: 0000000000000006 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fb93f0436c0(0000) GS:ffff888125e1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01f8bcd000 CR3: 000000009195c000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	05 00 00 4c 89       	add    $0x894c0000,%eax
   5:	64 24 30             	fs and $0x30,%al
   8:	49 83 ed 80          	sub    $0xffffffffffffff80,%r13
   c:	4c 89 6c 24 40       	mov    %r13,0x40(%rsp)
  11:	48 8b 44 24 68       	mov    0x68(%rsp),%rax
  16:	48 c1 e8 03          	shr    $0x3,%rax
  1a:	48 89 44 24 58       	mov    %rax,0x58(%rsp)
  1f:	4d 8d 66 31          	lea    0x31(%r14),%r12
  23:	4d 89 e5             	mov    %r12,%r13
  26:	49 c1 ed 03          	shr    $0x3,%r13
* 2a:	43 0f b6 44 3d 00    	movzbl 0x0(%r13,%r15,1),%eax <-- trapping instruction
  30:	84 c0                	test   %al,%al
  32:	0f 85 36 02 00 00    	jne    0x26e
  38:	49 8d 5e e8          	lea    -0x18(%r14),%rbx
  3c:	41                   	rex.B
  3d:	80                   	.byte 0x80
  3e:	3c 24                	cmp    $0x24,%al