Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 8677 Comm: syz.7.612 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:saitek_event+0x51/0x2b0 drivers/hid/hid-saitek.c:154
Code: aa f8 49 83 c6 78 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 2d 69 1b f9 4d 8b 36 49 83 c6 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 10 69 1b f9 49 8b 06 48 89 04 24
RSP: 0018:ffffc90000a18830 EFLAGS: 00010016
RAX: 0000000000000003 RBX: ffff8880755e5b88 RCX: 0000000000040000
RDX: ffffc900020a1000 RSI: 0000000000000058 RDI: 0000000000000059
RBP: 000000000000003a R08: 0000000000000000 R09: ffff8880755e5ba8
R10: dffffc0000000000 R11: ffffffff891d8740 R12: ffffffff910c0d28
R13: dffffc0000000000 R14: 0000000000000018 R15: ffff8880452e0000
FS: 00007f30054906c0(0000) GS:ffff888123bbf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f016362dff8 CR3: 0000000075896000 CR4: 0000000000350ef0
Call Trace:
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cc0 drivers/usb/gadget/udc/dummy_hcd.c:2023
__run_hrtimer kernel/time/hrtimer.c:2074 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2131
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2148
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221
Code: f7 e8 7d a0 b8 f5 f7 c3 00 02 00 00 74 05 e8 70 ef e4 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 b4 9d a9 f5 65 48 8b 05 0c a0 aa 08 48 85 c0 74 18 5b 41 5e e9
RSP: 0018:ffffc90002e975e8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 8000000000000002
RDX: 0000000000000006 RSI: ffffffff8e469795 RDI: 0000000000000001
RBP: ffffc90002e97828 R08: ffffffff917a737f R09: 1ffffffff22f4e6f
R10: dffffc0000000000 R11: fffffbfff22f4e70 R12: dffffc0000000000
R13: 000000000000001f R14: ffff88804d4ea398 R15: ffff8880b8533ac0
spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
lruvec_unlock_irqrestore include/linux/memcontrol.h:1535 [inline]
folio_batch_move_lru+0x80c/0xa60 mm/folio.c:200
__folio_batch_add_and_move+0x510/0xc50 mm/folio.c:225
shmem_alloc_and_add_folio+0xcc2/0xf60 mm/shmem.c:2037
shmem_get_folio_gfp+0x5da/0x16d0 mm/shmem.c:2531
shmem_get_folio mm/shmem.c:2637 [inline]
shmem_write_begin+0x16c/0x330 mm/shmem.c:3268
generic_perform_write+0x2d5/0x8f0 mm/filemap.c:4374
shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3443
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f300455ed8e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f300548fda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f30054906c0 RCX: 00007f300455ed8e
RDX: 0000000001000000 RSI: 00007f2ffa200000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f300548fee0 R14: 00007f300548fea0 R15: 00007f2ffa200000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:saitek_event+0x51/0x2b0 drivers/hid/hid-saitek.c:154
Code: aa f8 49 83 c6 78 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 2d 69 1b f9 4d 8b 36 49 83 c6 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 10 69 1b f9 49 8b 06 48 89 04 24
RSP: 0018:ffffc90000a18830 EFLAGS: 00010016
RAX: 0000000000000003 RBX: ffff8880755e5b88 RCX: 0000000000040000
RDX: ffffc900020a1000 RSI: 0000000000000058 RDI: 0000000000000059
RBP: 000000000000003a R08: 0000000000000000 R09: ffff8880755e5ba8
R10: dffffc0000000000 R11: ffffffff891d8740 R12: ffffffff910c0d28
R13: dffffc0000000000 R14: 0000000000000018 R15: ffff8880452e0000
FS: 00007f30054906c0(0000) GS:ffff888123bbf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f016362dff8 CR3: 0000000075896000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: aa stos %al,%es:(%rdi)
1: f8 clc
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 28 00 cmpb $0x0,(%rax,%r13,1)
12: 74 08 je 0x1c
14: 4c 89 f7 mov %r14,%rdi
17: e8 2d 69 1b f9 call 0xf91b6949
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 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 10 69 1b f9 call 0xf91b6949
39: 49 8b 06 mov (%r14),%rax
3c: 48 89 04 24 mov %rax,(%rsp)