general protection fault in wacom_intuos_irq

Status: upstream: reported C repro on 2026/09/20 03:29
Reported-by: syzbot+487f242f329acda929b0@syzkaller.appspotmail.com
First crash: 4d04h, last: 1d05h
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 general protection fault in wacom_intuos_irq 2 syz, C 2 3d04h 3d09h 0/2 upstream: reported C repro on 2026/09/20 21:57
upstream general protection fault in wacom_intuos_irq prio:high input 8 syz, C 11 28m 12h34m 0/29 upstream: reported C repro on 2026/09/23 19:17

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000066: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337]
CPU: 0 PID: 4418 Comm: syz.0.81 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:wacom_intuos_irq+0x333a/0x33e0 drivers/hid/wacom_wac.c:1082
Code: 7c 24 30 e8 78 70 48 fa e9 5c f1 ff ff e8 be 3c 03 fa 49 81 c6 30 03 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 58 70 48 fa 4d 8b 36 48 b8 00 00 00
RSP: 0018:ffffc900038cf730 EFLAGS: 00010206
RAX: 0000000000000066 RBX: 1ffff1100fbb406b RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8d30bf00 RDI: 0000000000000000
RBP: ffff88807dda0038 R08: ffff88807f0bd940 R09: 0000000000000007
R10: 0000000000000011 R11: 0000000000000000 R12: 1ffff1100fbb4027
R13: 0000000000000000 R14: 0000000000000330 R15: dffffc0000000000
FS:  0000555567ea7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f449b04ab08 CR3: 000000001e978000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 wacom_wac_irq+0x8d0/0x9780 drivers/hid/wacom_wac.c:3445
 wacom_raw_event+0xa8a/0xd50 drivers/hid/wacom_sys.c:174
 hid_input_report+0x3fe/0x4f0 drivers/hid/hid-core.c:1916
 uhid_dev_input2+0xb1/0x130 drivers/hid/uhid.c:611
 uhid_char_write+0x376/0xaf0 drivers/hid/uhid.c:769
 vfs_write+0x304/0xd70 fs/read_write.c:592
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f637cbf9159
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:00007fff5c93b7a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f637ce80fa0 RCX: 00007f637cbf9159
RDX: 0000000000000010 RSI: 0000200000000300 RDI: 0000000000000004
RBP: 00007f637cc9006b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f637ce80fac R14: 00007f637ce80fa0 R15: 00007f637ce80fa0
 </TASK>
Modules linked in:
---[ end trace 7370edbc8f9269f0 ]---
RIP: 0010:wacom_intuos_irq+0x333a/0x33e0 drivers/hid/wacom_wac.c:1082
Code: 7c 24 30 e8 78 70 48 fa e9 5c f1 ff ff e8 be 3c 03 fa 49 81 c6 30 03 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 58 70 48 fa 4d 8b 36 48 b8 00 00 00
RSP: 0018:ffffc900038cf730 EFLAGS: 00010206
RAX: 0000000000000066 RBX: 1ffff1100fbb406b RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8d30bf00 RDI: 0000000000000000
RBP: ffff88807dda0038 R08: ffff88807f0bd940 R09: 0000000000000007
R10: 0000000000000011 R11: 0000000000000000 R12: 1ffff1100fbb4027
R13: 0000000000000000 R14: 0000000000000330 R15: dffffc0000000000
FS:  0000555567ea7500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe824a712c0 CR3: 000000001e978000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7c 24                	jl     0x26
   2:	30 e8                	xor    %ch,%al
   4:	78 70                	js     0x76
   6:	48 fa                	rex.W cli
   8:	e9 5c f1 ff ff       	jmp    0xfffff169
   d:	e8 be 3c 03 fa       	call   0xfa033cd0
  12:	49 81 c6 30 03 00 00 	add    $0x330,%r14
  19:	4c 89 f0             	mov    %r14,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 f7             	mov    %r14,%rdi
  33:	e8 58 70 48 fa       	call   0xfa487090
  38:	4d 8b 36             	mov    (%r14),%r14
  3b:	48                   	rex.W
  3c:	b8                   	.byte 0xb8
  3d:	00 00                	add    %al,(%rax)

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/20 07:42 linux-5.15.y 0248c33e835e 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
2026/09/23 02:02 linux-5.15.y 0248c33e835e 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
2026/09/21 22:58 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
2026/09/20 17:29 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
2026/09/20 04:27 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
2026/09/20 03:28 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in wacom_intuos_irq
* Struck through repros no longer work on HEAD.