==================================================================
BUG: KASAN: null-ptr-deref in mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:910
Write of size 75 at addr 0000000000000000 by task modprobe/18650

CPU: 0 UID: 0 PID: 18650 Comm: modprobe 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+0x38b/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:kernel_text_address+0x28/0x100 kernel/extable.c:133
Code: 90 90 66 0f 1f 00 53 48 89 fb 48 83 ec 08 48 81 ff 00 00 00 81 72 18 48 81 ff a7 b5 40 87 73 0f 48 83 c4 08 b8 01 00 00 00 5b <c3> cc cc cc cc 48 89 df e8 bb 9c da ff 85 c0 75 e5 48 c7 c0 84 39
RSP: 0018:ffffc90016a568c0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffffffff8169705e RCX: ffffc90016a56988
RDX: 1ffff92002d4ad27 RSI: ffffffff88d06ace RDI: ffffffff8169705e
RBP: ffffc90016a56938 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000003351 R12: ffffffff81696cd0
R13: ffffc90016a569b0 R14: 0000000000000000 R15: ffff88812081d700
 __kernel_text_address+0xd/0x40 kernel/extable.c:79
 unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_record_aux_stack+0x8c/0xa0 mm/kasan/generic.c:548
 __call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
 mas_topiary_node lib/maple_tree.c:2527 [inline]
 mas_topiary_replace+0x1f35/0x3520 lib/maple_tree.c:2628
 mas_wmb_replace lib/maple_tree.c:2651 [inline]
 mas_split+0xb39/0x11e0 lib/maple_tree.c:3390
 mas_commit_b_node.isra.0+0x76/0xb0 lib/maple_tree.c:3410
 mas_wr_bnode+0x13c/0x1c0 lib/maple_tree.c:4079
 mas_wr_store_entry+0xefa/0x2550 lib/maple_tree.c:4111
 mas_store_prealloc+0x771/0x1680 lib/maple_tree.c:5510
 vma_iter_store_new mm/vma.h:508 [inline]
 vma_complete+0x971/0xe80 mm/vma.c:354
 __split_vma+0xbe8/0x1040 mm/vma.c:568
 split_vma mm/vma.c:598 [inline]
 vma_modify+0xadb/0x21a0 mm/vma.c:1631
 vma_modify_flags+0x1b0/0x250 mm/vma.c:1649
 mprotect_fixup+0x1df/0xb40 mm/mprotect.c:816
 do_mprotect_pkey+0x9ca/0xd50 mm/mprotect.c:990
 __do_sys_mprotect mm/mprotect.c:1011 [inline]
 __se_sys_mprotect mm/mprotect.c:1008 [inline]
 __x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:1008
 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: 0033:0x7f47674092c7
Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007fff2dd38f78 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f47670e00c0 RCX: 00007f47674092c7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f47670dd000
RBP: 00007fff2dd39240 R08: 0000000000000000 R09: 00007f476717bc90
R10: 00007f47670e00c0 R11: 0000000000000206 R12: 0000000000000030
R13: 000003cd8ae8aa76 R14: 0000000000000000 R15: 00007f476741d310
 </TASK>
==================================================================
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	66 0f 1f 00          	nopw   (%rax)
   6:	53                   	push   %rbx
   7:	48 89 fb             	mov    %rdi,%rbx
   a:	48 83 ec 08          	sub    $0x8,%rsp
   e:	48 81 ff 00 00 00 81 	cmp    $0xffffffff81000000,%rdi
  15:	72 18                	jb     0x2f
  17:	48 81 ff a7 b5 40 87 	cmp    $0xffffffff8740b5a7,%rdi
  1e:	73 0f                	jae    0x2f
  20:	48 83 c4 08          	add    $0x8,%rsp
  24:	b8 01 00 00 00       	mov    $0x1,%eax
  29:	5b                   	pop    %rbx
* 2a:	c3                   	ret <-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	48 89 df             	mov    %rbx,%rdi
  32:	e8 bb 9c da ff       	call   0xffda9cf2
  37:	85 c0                	test   %eax,%eax
  39:	75 e5                	jne    0x20
  3b:	48                   	rex.W
  3c:	c7                   	.byte 0xc7
  3d:	c0                   	.byte 0xc0
  3e:	84 39                	test   %bh,(%rcx)