general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 11799 Comm: syz.3.2122 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:hidpp_match_answer drivers/hid/hid-logitech-hidpp.c:467 [inline]
RIP: 0010:hidpp_raw_hidpp_event+0x2b3f/0x3ca0 drivers/hid/hid-logitech-hidpp.c:3884
Code: 8d 5c 24 02 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 ee 0f 85 05 10 00 00 44 0f b6 2b 49 8d 5f 02 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 03 10 00 00 0f b6 03 0f b6 d8 44 89 ef
RSP: 0018:ffffc900036df980 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888065164038
RBP: ffffc900036dfab0 R08: ffff88806516403f R09: 1ffff1100ca2c807
R10: dffffc0000000000 R11: ffffed100ca2c808 R12: ffff8880238540b6
R13: 000000000000008f R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f1a6639d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e122ff8 CR3: 0000000067bd8000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 hidpp_raw_event+0x1bc/0x1aa0 drivers/hid/hid-logitech-hidpp.c:-1
 hid_input_report+0x3ed/0x500 drivers/hid/hid-core.c:2132
 uhid_dev_input2+0xb1/0x130 drivers/hid/uhid.c:610
 uhid_char_write+0x4ac/0xc60 drivers/hid/uhid.c:768
 vfs_write+0x299/0x9a0 fs/read_write.c:582
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1a6559e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1a6639d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1a65825fa0 RCX: 00007f1a6559e159
RDX: 000000000000000d RSI: 0000200000000380 RDI: 0000000000000003
RBP: 00007f1a6563506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a65826038 R14: 00007f1a65825fa0 R15: 00007ffc56e545d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hidpp_match_answer drivers/hid/hid-logitech-hidpp.c:467 [inline]
RIP: 0010:hidpp_raw_hidpp_event+0x2b3f/0x3ca0 drivers/hid/hid-logitech-hidpp.c:3884
Code: 8d 5c 24 02 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 ee 0f 85 05 10 00 00 44 0f b6 2b 49 8d 5f 02 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 03 10 00 00 0f b6 03 0f b6 d8 44 89 ef
RSP: 0018:ffffc900036df980 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888065164038
RBP: ffffc900036dfab0 R08: ffff88806516403f R09: 1ffff1100ca2c807
R10: dffffc0000000000 R11: ffffed100ca2c808 R12: ffff8880238540b6
R13: 000000000000008f R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f1a6639d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f62053ed158 CR3: 0000000067bd8000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	8d 5c 24 02          	lea    0x2(%rsp),%ebx
   4:	48 89 d8             	mov    %rbx,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
  10:	84 c0                	test   %al,%al
  12:	4d 89 ee             	mov    %r13,%r14
  15:	0f 85 05 10 00 00    	jne    0x1020
  1b:	44 0f b6 2b          	movzbl (%rbx),%r13d
  1f:	49 8d 5f 02          	lea    0x2(%r15),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 03 10 00 00    	jne    0x103a
  37:	0f b6 03             	movzbl (%rbx),%eax
  3a:	0f b6 d8             	movzbl %al,%ebx
  3d:	44 89 ef             	mov    %r13d,%edi