BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1131f0067 P4D 1131f0067 PUD 1130c2067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 2042 Comm: kworker/0:2 Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events_long serio_handle_event
RIP: 0010:strchr+0x4/0x30 lib/string.c:329
Code: c0 eb 0d 84 c9 74 18 48 83 c0 01 48 39 d0 74 0f 0f b6 0c 07 3a 0c 06 74 ea 19 c0 83 c8 01 c3 31 c0 c3 0f 1f 40 00 f3 0f 1e fa <0f> b6 07 89 f2 40 38 f0 75 0e eb 13 0f b6 47 01 48 83 c7 01 38 d0
RSP: 0018:ffffc90000f77ce8 EFLAGS: 00010246
RAX: ffffc90000f77d50 RBX: 0000000000000000 RCX: ffffc90000f77cec
RDX: ffffc90000f77d30 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90000f77d30 R08: 00000000000000f4 R09: ffff8881072925a8
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000cc0
R13: 0000000000000000 R14: ffff8881132cf660 R15: ffff88810df4a9c0
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000110356000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kvasprintf_const+0x1e/0xa0 lib/kasprintf.c:45
 kobject_set_name_vargs+0x20/0x90 lib/kobject.c:272
 kobject_add_varg lib/kobject.c:366 [inline]
 kobject_add+0x84/0x100 lib/kobject.c:424
 device_add+0xe4/0x8d0 drivers/base/core.c:3562
 serio_add_port drivers/input/serio/serio.c:539 [inline]
 serio_handle_event+0x2a2/0x2f0 drivers/input/serio/serio.c:207
 process_one_work+0x297/0x4f0 kernel/workqueue.c:2597
 worker_thread+0x4e/0x330 kernel/workqueue.c:2748
 kthread+0xde/0x110 kernel/kthread.c:389
 ret_from_fork+0x2c/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:strchr+0x4/0x30 lib/string.c:329
Code: c0 eb 0d 84 c9 74 18 48 83 c0 01 48 39 d0 74 0f 0f b6 0c 07 3a 0c 06 74 ea 19 c0 83 c8 01 c3 31 c0 c3 0f 1f 40 00 f3 0f 1e fa <0f> b6 07 89 f2 40 38 f0 75 0e eb 13 0f b6 47 01 48 83 c7 01 38 d0
RSP: 0018:ffffc90000f77ce8 EFLAGS: 00010246
RAX: ffffc90000f77d50 RBX: 0000000000000000 RCX: ffffc90000f77cec
RDX: ffffc90000f77d30 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90000f77d30 R08: 00000000000000f4 R09: ffff8881072925a8
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000cc0
R13: 0000000000000000 R14: ffff8881132cf660 R15: ffff88810df4a9c0
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000110356000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	c0 eb 0d             	shr    $0xd,%bl
   3:	84 c9                	test   %cl,%cl
   5:	74 18                	je     0x1f
   7:	48 83 c0 01          	add    $0x1,%rax
   b:	48 39 d0             	cmp    %rdx,%rax
   e:	74 0f                	je     0x1f
  10:	0f b6 0c 07          	movzbl (%rdi,%rax,1),%ecx
  14:	3a 0c 06             	cmp    (%rsi,%rax,1),%cl
  17:	74 ea                	je     0x3
  19:	19 c0                	sbb    %eax,%eax
  1b:	83 c8 01             	or     $0x1,%eax
  1e:	c3                   	ret
  1f:	31 c0                	xor    %eax,%eax
  21:	c3                   	ret
  22:	0f 1f 40 00          	nopl   0x0(%rax)
  26:	f3 0f 1e fa          	endbr64
* 2a:	0f b6 07             	movzbl (%rdi),%eax <-- trapping instruction
  2d:	89 f2                	mov    %esi,%edx
  2f:	40 38 f0             	cmp    %sil,%al
  32:	75 0e                	jne    0x42
  34:	eb 13                	jmp    0x49
  36:	0f b6 47 01          	movzbl 0x1(%rdi),%eax
  3a:	48 83 c7 01          	add    $0x1,%rdi
  3e:	38 d0                	cmp    %dl,%al