------------[ cut here ]------------
WARNING: CPU: 0 PID: 4248 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4248 Comm: kworker/0:7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events uhid_device_add_worker
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c0 f3 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000007418 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff8880208abb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004115771
R10: ffffed1004115771 R11: 1ffff11004115770 R12: ffff8880208ad308
R13: 00007ffffffff000 R14: ffffc90000007488 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002228d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
 bpf_prog_ee60aafa828f4cb7+0x35/0x520
 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
 bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
 __bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x25f/0x2a0 mm/slub.c:4554
 skb_free_head net/core/skbuff.c:655 [inline]
 skb_release_data+0x6fe/0x850 net/core/skbuff.c:677
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb net/core/skbuff.c:756 [inline]
 kfree_skb_reason+0xaf/0x110 net/core/skbuff.c:776
 kfree_skb include/linux/skbuff.h:1118 [inline]
 neigh_connected_output+0x3b9/0x3e0 net/core/neighbour.c:1536
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x1070/0x1500 net/ipv6/ip6_output.c:130
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbea/0x14a0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3956
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:strlen+0x3b/0x60 lib/string.c:581
Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 ad b4
RSP: 0018:ffffc900032afad0 EFLAGS: 00000206

RAX: 0000000000000000 RBX: ffffffff8ae8fe21 RCX: 000000008ae8fe00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ae8fe20
RBP: 1ffff1100bf8249a R08: dffffc0000000000 R09: ffffed100bf9952e
R10: ffffed100bf9952e R11: 1ffff1100bf9952d R12: 0000000000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff
 start_creating+0x177/0x310 fs/debugfs/inode.c:354
 __debugfs_create_file+0x6f/0x510 fs/debugfs/inode.c:399
 hid_debug_register+0xca/0x130 drivers/hid/hid-debug.c:1216
 hid_add_device+0x381/0x530 drivers/hid/hid-core.c:2469
 uhid_device_add_worker+0x3f/0xe0 drivers/hid/uhid.c:73
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess), 6 bytes skipped:
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	fb                   	sti
   4:	49 89 c7             	mov    %rax,%r15
   7:	48 89 d8             	mov    %rbx,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
  13:	84 c0                	test   %al,%al
  15:	75 11                	jne    0x28
  17:	48 ff c3             	inc    %rbx
  1a:	49 8d 47 01          	lea    0x1(%r15),%rax
  1e:	42 80 7c 3f 01 00    	cmpb   $0x0,0x1(%rdi,%r15,1)
* 24:	75 de                	jne    0x4 <-- trapping instruction
  26:	eb 19                	jmp    0x41
  28:	89 d9                	mov    %ebx,%ecx
  2a:	80 e1 07             	and    $0x7,%cl
  2d:	38 c1                	cmp    %al,%cl
  2f:	7c e6                	jl     0x17
  31:	49 89 fc             	mov    %rdi,%r12
  34:	48 89 df             	mov    %rbx,%rdi
  37:	e8                   	.byte 0xe8
  38:	ad                   	lods   %ds:(%rsi),%eax
  39:	b4                   	.byte 0xb4