syzbot
general protection fault in saitek_event
Status:
premoderation: reported C repro on 2026/10/11 08:25
Bug presence:
origin:upstream
[Documentation on labels]
Reported-by: syzbot+7cb7a0a3a9bc1c17ad0c@syzkaller.appspotmail.com
First crash: 10d, last: 2d13h
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Bug presence (2)
| Date |
Name |
Commit |
Repro |
Result |
| 2026/10/14 |
lts (merge base) |
e9f803bf2b03 |
C
|
[report] general protection fault in saitek_event
|
| 2026/10/14 |
upstream (ToT) |
0fcb05b72344 |
C
|
[report] general protection fault in saitek_event
|
Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 309 Comm: sshd-session Not tainted syzkaller #0 bcd0852b9269e5a174a9e289c8567167f3c3d1d7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:saitek_event+0x55/0x2d0 drivers/hid/hid-saitek.c:154
Code: 5c fd 49 83 c6 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 a9 89 b5 fd 4d 8b 36 49 83 c6 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 8c 89 b5 fd 49 8b 06 48 89 45 d0
RSP: 0018:ffffc900002306e0 EFLAGS: 00010006
RAX: 0000000000000003 RBX: ffff8881076e5e88 RCX: ffff888105f00000
RDX: 0000000000000100 RSI: ffff8881076e5e00 RDI: ffff8881026ec000
RBP: ffffc90000230710 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff842d3850 R12: dffffc0000000000
R13: 000000000000008d R14: 0000000000000018 R15: ffff8881026ec000
FS: 00007fb6db742300(0000) GS:ffff8881f6d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16bf57cbb0 CR3: 0000000102ff8000 CR4: 00000000003526b0
Call Trace:
<IRQ>
hid_process_event+0x410/0x5f0 drivers/hid/hid-core.c:1527
hid_process_report drivers/hid/hid-core.c:1685 [inline]
__hid_report_raw_event+0x100b/0x18e0 drivers/hid/hid-core.c:2067
__hid_input_report+0x444/0x4d0 drivers/hid/hid-core.c:2145
hid_safe_input_report+0x42/0x60 drivers/hid/hid-core.c:2192
hid_ctrl+0x200/0x590 drivers/hid/usbhid/hid-core.c:485
__usb_hcd_giveback_urb+0x36e/0x530 drivers/usb/core/hcd.c:1646
usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1758 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
handle_softirqs+0x1aa/0x5b0 kernel/softirq.c:621
__do_softirq kernel/softirq.c:659 [inline]
invoke_softirq kernel/softirq.c:476 [inline]
__irq_exit_rcu+0x47/0xb0 kernel/softirq.c:708
irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:165 [inline]
RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
RIP: 0010:do_syscall_64+0x23/0xf0 arch/x86/entry/common.c:74
Code: 90 90 90 90 90 90 90 66 0f 1f 00 55 48 89 e5 41 56 53 48 83 e4 f0 48 89 e3 49 89 fe 0f 1f 44 00 00 fb 65 48 8b 05 8d d4 5c 7a <48> 8b 50 08 f6 c2 3f 74 0e 48 63 f6 4c 89 f7 e8 09 63 cd fb 48 89
RSP: 0018:ffffc9000115ff30 EFLAGS: 00000286
RAX: ffff888105f00000 RBX: ffffc9000115ff30 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000000e RDI: ffffc9000115ff58
RBP: ffffc9000115ff48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000115ff58 R15: 0000000000000000
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fb6db0b0f60
Code: 48 85 f6 74 15 48 b9 00 00 00 80 01 00 00 00 48 8b 06 48 85 c8 75 33 48 89 f0 48 89 c6 41 ba 08 00 00 00 b8 0e 00 00 00 0f 05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 48 83 c4 10 c3
RSP: 002b:00007fffafd3d368 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
RAX: ffffffffffffffda RBX: 0000563d712bd3e0 RCX: 00007fb6db0b0f60
RDX: 00007fffafd3d470 RSI: 00007fffafd3d3f0 RDI: 0000000000000000
RBP: 00007fffafd3d3e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffafd3d470 R14: 0000000000000000 R15: 0000000000000004
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:saitek_event+0x55/0x2d0 drivers/hid/hid-saitek.c:154
Code: 5c fd 49 83 c6 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 a9 89 b5 fd 4d 8b 36 49 83 c6 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 8c 89 b5 fd 49 8b 06 48 89 45 d0
RSP: 0018:ffffc900002306e0 EFLAGS: 00010006
RAX: 0000000000000003 RBX: ffff8881076e5e88 RCX: ffff888105f00000
RDX: 0000000000000100 RSI: ffff8881076e5e00 RDI: ffff8881026ec000
RBP: ffffc90000230710 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff842d3850 R12: dffffc0000000000
R13: 000000000000008d R14: 0000000000000018 R15: ffff8881026ec000
FS: 00007fb6db742300(0000) GS:ffff8881f6d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16bf57cbb0 CR3: 0000000102ff8000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
0: 5c pop %rsp
1: fd std
2: 49 83 c6 78 add $0x78,%r14
6: 4c 89 f0 mov %r14,%rax
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
12: 74 08 je 0x1c
14: 4c 89 f7 mov %r14,%rdi
17: e8 a9 89 b5 fd call 0xfdb589c5
1c: 4d 8b 36 mov (%r14),%r14
1f: 49 83 c6 18 add $0x18,%r14
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 8c 89 b5 fd call 0xfdb589c5
39: 49 8b 06 mov (%r14),%rax
3c: 48 89 45 d0 mov %rax,-0x30(%rbp)
Struck through repros no longer work on HEAD.