general protection fault in hidpp_raw_hidpp_event

Status: premoderation: reported syz repro on 2026/08/24 16:03
Reported-by: syzbot+7e6b5379c0905d0df904@syzkaller.appspotmail.com
First crash: 6d06h, last: 6d06h
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 general protection fault in hidpp_raw_hidpp_event 2 syz, C 7 17d 25d 0/3 upstream: reported C repro on 2026/08/05 04:15
linux-6.6 general protection fault in hidpp_raw_hidpp_event 2 3 24d 26d 0/2 upstream: reported on 2026/08/04 21:27
linux-6.1 general protection fault in hidpp_raw_hidpp_event 8 7 23h28m 23d 0/3 upstream: reported on 2026/08/07 12:51

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 12865 Comm: syz.5.5620 Not tainted syzkaller #0 9a2c17613351c9eac8e18d74829f474689ac6bc1
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:462 [inline]
RIP: 0010:hidpp_raw_hidpp_event+0x2b7c/0x3c30 drivers/hid/hid-logitech-hidpp.c:3885
Code: 8d 5c 24 02 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 ee 0f 85 e4 0f 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 e2 0f 00 00 0f b6 03 0f b6 d8 44 89 ef
RSP: 0018:ffffc900042a78a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881179d2038
RBP: ffffc900042a79f0 R08: ffff8881179d203f R09: 1ffff11022f3a407
R10: dffffc0000000000 R11: ffffed1022f3a408 R12: ffff888110c08056
R13: 0000000000000004 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f8a9a5266c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcae0070000 CR3: 0000000104bda000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 hidpp_raw_event+0x1b9/0x1a90 drivers/hid/hid-logitech-hidpp.c:-1
 __hid_input_report+0x40a/0x4d0 drivers/hid/hid-core.c:2140
 hid_safe_input_report+0x42/0x60 drivers/hid/hid-core.c:2192
 uhid_dev_input2+0xba/0x150 drivers/hid/uhid.c:609
 uhid_char_write+0x485/0xce0 drivers/hid/uhid.c:767
 vfs_write+0x3c4/0xfd0 fs/read_write.c:682
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f8a9959e0d9
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:00007f8a9a526028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8a99825fa0 RCX: 00007f8a9959e0d9
RDX: 000000000000001a RSI: 0000200000000d00 RDI: 0000000000000003
RBP: 00007f8a99635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8a99826038 R14: 00007f8a99825fa0 R15: 00007fffc0822ef8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hidpp_match_answer drivers/hid/hid-logitech-hidpp.c:462 [inline]
RIP: 0010:hidpp_raw_hidpp_event+0x2b7c/0x3c30 drivers/hid/hid-logitech-hidpp.c:3885
Code: 8d 5c 24 02 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 ee 0f 85 e4 0f 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 e2 0f 00 00 0f b6 03 0f b6 d8 44 89 ef
RSP: 0018:ffffc900042a78a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881179d2038
RBP: ffffc900042a79f0 R08: ffff8881179d203f R09: 1ffff11022f3a407
R10: dffffc0000000000 R11: ffffed1022f3a408 R12: ffff888110c08056
R13: 0000000000000004 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f8a9a5266c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcadffeaff8 CR3: 0000000104bda000 CR4: 00000000003526b0
----------------
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 e4 0f 00 00    	jne    0xfff
  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 e2 0f 00 00    	jne    0x1019
  37:	0f b6 03             	movzbl (%rbx),%eax
  3a:	0f b6 d8             	movzbl %al,%ebx
  3d:	44 89 ef             	mov    %r13d,%edi

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/24 16:02 android16-6.12 e8c85685a629 b55bd4c3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in hidpp_raw_hidpp_event
* Struck through repros no longer work on HEAD.