general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:saitek_event+0x51/0x2c0 drivers/hid/hid-saitek.c:154 Code: 00 fe 49 83 c6 60 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 cd 88 3b fe 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 b0 88 3b fe 49 8b 06 48 89 45 d0 RSP: 0018:ffffc90000170700 EFLAGS: 00010006 RAX: 0000000000000003 RBX: ffff8881059ed170 RCX: ffff888100291400 RDX: 0000000000000101 RSI: ffff8881059ed100 RDI: ffff888100b90000 RBP: ffffc90000170730 R08: 0000000000000000 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200002e088 R12: dffffc0000000000 R13: 000000000000008d R14: 0000000000000018 R15: ffff888100b90000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3070c40d58 CR3: 00000001087bd000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hid_process_event+0x3ea/0x5a0 drivers/hid/hid-core.c:1538 hid_input_field drivers/hid/hid-core.c:1592 [inline] __hid_report_raw_event+0x143b/0x1dd0 drivers/hid/hid-core.c:1847 hid_input_report+0x44c/0x500 drivers/hid/hid-core.c:1922 hid_ctrl+0x235/0x510 drivers/hid/usbhid/hid-core.c:486 __usb_hcd_giveback_urb+0x32f/0x4f0 drivers/usb/core/hcd.c:1674 usb_hcd_giveback_urb+0x11d/0x3f0 drivers/usb/core/hcd.c:1748 dummy_timer+0xa3a/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:2000 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450 expire_timers kernel/time/timer.c:1495 [inline] __run_timers+0x637/0x9a0 kernel/time/timer.c:1789 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:default_idle+0x12/0x20 arch/x86/kernel/process.c:718 Code: 49 bd 00 00 00 00 00 fc ff df e9 68 ff ff ff e8 84 f7 fa ff 00 00 cc cc 55 48 89 e5 0f 1f 44 00 00 0f 00 2d 30 f8 61 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41 56 RSP: 0018:ffffc90000107db8 EFLAGS: 00000252 RAX: ffff8881f7100000 RBX: ffff888100291400 RCX: 00000000000059ce RDX: 0000000000000001 RSI: ffffffff85406bc0 RDI: ffffffff85406b80 RBP: ffffc90000107db8 R08: ffff8881f7157413 R09: 1ffff1103ee2ae82 R10: dffffc0000000000 R11: ffffed103ee2ae83 R12: 0000000000000000 R13: 1ffff11020052280 R14: dffffc0000000000 R15: dffffc0000000000 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:709 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:114 cpuidle_idle_call kernel/sched/idle.c:204 [inline] do_idle+0x217/0x620 kernel/sched/idle.c:328 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:425 start_secondary+0x2cb/0x380 arch/x86/kernel/smpboot.c:276 secondary_startup_64_no_verify+0xad/0xbb Modules linked in: ---[ end trace dd0aed80149470ce ]--- RIP: 0010:saitek_event+0x51/0x2c0 drivers/hid/hid-saitek.c:154 Code: 00 fe 49 83 c6 60 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 cd 88 3b fe 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 b0 88 3b fe 49 8b 06 48 89 45 d0 RSP: 0018:ffffc90000170700 EFLAGS: 00010006 RAX: 0000000000000003 RBX: ffff8881059ed170 RCX: ffff888100291400 RDX: 0000000000000101 RSI: ffff8881059ed100 RDI: ffff888100b90000 RBP: ffffc90000170730 R08: 0000000000000000 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200002e088 R12: dffffc0000000000 R13: 000000000000008d R14: 0000000000000018 R15: ffff888100b90000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3070c40d58 CR3: 00000001087bd000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 fe add %bh,%dh 2: 49 83 c6 60 add $0x60,%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 cd 88 3b fe call 0xfe3b88e9 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 b0 88 3b fe call 0xfe3b88e9 39: 49 8b 06 mov (%r14),%rax 3c: 48 89 45 d0 mov %rax,-0x30(%rbp)