BUG: kernel NULL pointer dereference, address: 000000000000000a
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 114d7c067 P4D 114d7c067 PUD 114d7a067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 1296 Comm: syz-executor.0 Not tainted 6.1.1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:d_is_miss include/linux/dcache.h:391 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:437 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:447 [inline]
RIP: 0010:filename_create+0xeb/0x1a0 fs/namei.c:3813
Code: 7d c0 44 89 f2 e8 05 11 00 00 49 89 c6 48 3d 00 f0 ff ff 76 05 8b 5d b4 eb 41 80 7d bb 00 0f 95 c0 41 f6 c5 02 0f 94 c1 20 c1 <41> 0f b6 56 02 f6 c2 70 0f 95 c0 08 c8 49 c7 c7 ef ff ff ff f6 c2
RSP: 0018:ffffc900021b3e58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000500000000 RSI: 0000000000000000 RDI: ffff8881113711c0
RBP: ffffc900021b3ea8 R08: 00000000ffffff9c R09: ffffffff8153156f
R10: ffff88810b38c1c0 R11: ffff888100041400 R12: ffffc900021b3ec0
R13: 0000000000000002 R14: 0000000000000008 R15: 00000000000000a0
FS:  00007f74a4e0b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000a CR3: 0000000114d43000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_mkdirat+0xb7/0x150 fs/namei.c:4051
 __do_sys_mkdirat fs/namei.c:4076 [inline]
 __se_sys_mkdirat fs/namei.c:4074 [inline]
 __x64_sys_mkdirat+0x2c/0x40 fs/namei.c:4074
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f74a407b5e7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74a4e0aee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74a407b5e7
RDX: 00000000000001ff RSI: 00000000200001c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000200001c0
R13: 00007f74a4e0af40 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
CR2: 000000000000000a
---[ end trace 0000000000000000 ]---
RIP: 0010:d_is_miss include/linux/dcache.h:391 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:437 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:447 [inline]
RIP: 0010:filename_create+0xeb/0x1a0 fs/namei.c:3813
Code: 7d c0 44 89 f2 e8 05 11 00 00 49 89 c6 48 3d 00 f0 ff ff 76 05 8b 5d b4 eb 41 80 7d bb 00 0f 95 c0 41 f6 c5 02 0f 94 c1 20 c1 <41> 0f b6 56 02 f6 c2 70 0f 95 c0 08 c8 49 c7 c7 ef ff ff ff f6 c2
RSP: 0018:ffffc900021b3e58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000500000000 RSI: 0000000000000000 RDI: ffff8881113711c0
RBP: ffffc900021b3ea8 R08: 00000000ffffff9c R09: ffffffff8153156f
R10: ffff88810b38c1c0 R11: ffff888100041400 R12: ffffc900021b3ec0
R13: 0000000000000002 R14: 0000000000000008 R15: 00000000000000a0
FS:  00007f74a4e0b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000a CR3: 0000000114d43000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7d c0                	jge    0xffffffc2
   2:	44 89 f2             	mov    %r14d,%edx
   5:	e8 05 11 00 00       	call   0x110f
   a:	49 89 c6             	mov    %rax,%r14
   d:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
  13:	76 05                	jbe    0x1a
  15:	8b 5d b4             	mov    -0x4c(%rbp),%ebx
  18:	eb 41                	jmp    0x5b
  1a:	80 7d bb 00          	cmpb   $0x0,-0x45(%rbp)
  1e:	0f 95 c0             	setne  %al
  21:	41 f6 c5 02          	test   $0x2,%r13b
  25:	0f 94 c1             	sete   %cl
  28:	20 c1                	and    %al,%cl
* 2a:	41 0f b6 56 02       	movzbl 0x2(%r14),%edx <-- trapping instruction
  2f:	f6 c2 70             	test   $0x70,%dl
  32:	0f 95 c0             	setne  %al
  35:	08 c8                	or     %cl,%al
  37:	49 c7 c7 ef ff ff ff 	mov    $0xffffffffffffffef,%r15
  3e:	f6                   	.byte 0xf6
  3f:	c2                   	.byte 0xc2