==================================================================
BUG: KASAN: null-ptr-deref in mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:910
Write of size 222 at addr 0000000000000000 by task syz.1.807/8288

CPU: 1 UID: 0 PID: 8288 Comm: syz.1.807 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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+0x314/0x450 drivers/hid/hid-core.c:2130
 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x38a/0x6e0 drivers/usb/core/hcd.c:1663
 usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1747
 dummy_timer+0x1814/0x3a30 drivers/usb/gadget/udc/dummy_hcd.c:1995
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x202/0xad0 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:usb_ep_queue+0xe0/0x390 drivers/usb/gadget/udc/core.c:300
Code: c1 ea 03 80 3c 02 00 0f 85 9a 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 10 49 8d 7d 28 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 6d 02 00 00 44 89 e2 49 8b 45 28 48 89 ee 48 89 df e8 db e2
RSP: 0018:ffffc90014effd80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88810b330068 RCX: ffffffff84fabca6
RDX: 1ffffffff0fef979 RSI: ffffffff84fabcb4 RDI: ffffffff87f7cbc8
RBP: ffff88811d719f10 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000cc0
R13: ffffffff87f7cba0 R14: ffff888114d74158 R15: ffff888114d74150
 raw_process_ep0_io+0x4c2/0x980 drivers/usb/gadget/legacy/raw_gadget.c:727
 raw_ioctl_ep0_write drivers/usb/gadget/legacy/raw_gadget.c:766 [inline]
 raw_ioctl+0xb1b/0x2c30 drivers/usb/gadget/legacy/raw_gadget.c:1312
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 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: 0033:0x7f19389ae7eb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f1937414f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f19389ae7eb
RDX: 00007f1937414fd0 RSI: 0000000040085503 RDI: 0000000000000003
RBP: 00007f1937415fe0 R08: 0000000000000080 R09: 00007f1937414fd8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000012 R15: 00007f1938a3d391
 </TASK>
==================================================================
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 9a 02 00 00    	jne    0x2a7
   d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  14:	fc ff df
  17:	4c 8b 6b 10          	mov    0x10(%rbx),%r13
  1b:	49 8d 7d 28          	lea    0x28(%r13),%rdi
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
* 2a:	0f 85 6d 02 00 00    	jne    0x29d <-- trapping instruction
  30:	44 89 e2             	mov    %r12d,%edx
  33:	49 8b 45 28          	mov    0x28(%r13),%rax
  37:	48 89 ee             	mov    %rbp,%rsi
  3a:	48 89 df             	mov    %rbx,%rdi
  3d:	e8                   	.byte 0xe8
  3e:	db e2                	fnclex