==================================================================
BUG: KASAN: null-ptr-deref in mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:910
Write of size 191 at addr 0000000000000000 by task syz-executor/2961

CPU: 0 UID: 0 PID: 2961 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
 __asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106
 mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:910
 __hid_input_report.constprop.0+0x311/0x450 drivers/hid/hid-core.c:2130
 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x388/0x610 drivers/usb/core/hcd.c:1661
 usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1745
 dummy_timer+0x1814/0x3a30 drivers/usb/gadget/udc/dummy_hcd.c:1995
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
 handle_softirqs+0x208/0x8d0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x1e9/0x9e0 kernel/sched/core.c:5225
Code: 0f 85 5f 07 00 00 8b 0d 79 7d 4e 09 85 c9 0f 85 b9 02 00 00 48 89 df e8 35 00 f1 05 e8 00 f3 36 00 fb 65 48 8b 1d 7f 3f 43 0b <48> 8d bb 50 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000181f518 EFLAGS: 00000202
RAX: 000000000026c343 RBX: ffff8881122a0000 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff88d262f4 RDI: ffffffff878963e0
RBP: ffffc9000181f558 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8a9d4fd7 R11: 0000000000000000 R12: ffff8881230f5700
R13: 0000000000000000 R14: ffff8881f58388d8 R15: ffff8881f5839418
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1304/0x3b90 kernel/sched/core.c:6961
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7145
 __cond_resched+0x22/0x30 kernel/sched/core.c:7490
 _cond_resched include/linux/sched.h:2070 [inline]
 copy_pte_range mm/memory.c:1202 [inline]
 copy_pmd_range mm/memory.c:1261 [inline]
 copy_pud_range mm/memory.c:1298 [inline]
 copy_p4d_range mm/memory.c:1322 [inline]
 copy_page_range+0x1203/0x2a40 mm/memory.c:1410
 dup_mmap+0xdea/0x2050 mm/mmap.c:1834
 dup_mm kernel/fork.c:1485 [inline]
 copy_mm kernel/fork.c:1537 [inline]
 copy_process+0x705a/0x7580 kernel/fork.c:2175
 kernel_clone+0xfc/0x930 kernel/fork.c:2605
 __do_sys_clone+0xce/0x120 kernel/fork.c:2748
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1346d35413
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe9766dcf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1346d35413
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 000055555b1867d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000d1e65 R15: 00007ffe9766de90
 </TASK>
==================================================================
----------------
Code disassembly (best guess):
   0:	0f 85 5f 07 00 00    	jne    0x765
   6:	8b 0d 79 7d 4e 09    	mov    0x94e7d79(%rip),%ecx        # 0x94e7d85
   c:	85 c9                	test   %ecx,%ecx
   e:	0f 85 b9 02 00 00    	jne    0x2cd
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 35 00 f1 05       	call   0x5f10051
  1c:	e8 00 f3 36 00       	call   0x36f321
  21:	fb                   	sti
  22:	65 48 8b 1d 7f 3f 43 	mov    %gs:0xb433f7f(%rip),%rbx        # 0xb433fa9
  29:	0b
* 2a:	48 8d bb 50 15 00 00 	lea    0x1550(%rbx),%rdi <-- trapping instruction
  31:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  38:	fc ff df
  3b:	48 89 fa             	mov    %rdi,%rdx
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1