==================================================================
BUG: KASAN: null-ptr-deref in mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:910
Write of size 231 at addr 0000000000000000 by task modprobe/12764
CPU: 1 UID: 0 PID: 12764 Comm: modprobe Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:fput_close_sync+0x0/0x210 fs/file_table.c:571
Code: e8 55 9c f5 ff eb d6 e8 5e 9b f5 ff eb b0 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 56 41 55 41 54 55 48 bd 00 00 00 00 00 fc ff df 53
RSP: 0018:ffffc90015757f08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88811d64ba00 RSI: ffffffff81e474c8 RDI: ffff888119b8cfc0
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000004000
R10: 0000000000008000 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
__do_sys_close fs/open.c:1587 [inline]
__se_sys_close fs/open.c:1572 [inline]
__x64_sys_close+0x8b/0x120 fs/open.c:1572
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: 0033:0x7fb0cfbacfa7
Code: 00 00 00 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 0e ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 f7 d8 89 05 e8 42 01 00 b8 ff ff ff ff
RSP: 002b:00007ffe61e2e938 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fb0cf886040 RCX: 00007fb0cfbacfa7
RDX: 000000000002b890 RSI: 00007fb0cfb82ab0 RDI: 0000000000000000
RBP: 00007ffe61e2ea90 R08: 00007fb0cf8b18a8 R09: 0000000000000030
R10: 00000000c0010001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb0cfb82ab0 R14: 00007ffe61e2eb30 R15: 00007fb0cf8b4000
==================================================================
----------------
Code disassembly (best guess):
0: e8 55 9c f5 ff call 0xfff59c5a
5: eb d6 jmp 0xffffffdd
7: e8 5e 9b f5 ff call 0xfff59b6a
c: eb b0 jmp 0xffffffbe
e: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
15: 00 00 00 00
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
29: 90 nop
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: 41 56 push %r14
30: 41 55 push %r13
32: 41 54 push %r12
34: 55 push %rbp
35: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
3c: fc ff df
3f: 53 push %rbx