------------[ cut here ]------------
WARNING: CPU: 0 PID: 4342 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4342 Comm: kworker/0:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: rcu_gp process_srcu
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d 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 f0 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:ffffc900000079a0 EFLAGS: 00010046
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff88802aa7bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff88802aa7d308
R13: dffffc0000000000 R14: ffffc90000007a08 R15: 000000000028e000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555568b3d5c8 CR3: 000000005f5fc000 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_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 bpf_prog_26fc836ad493b19c+0x3d/0xb14
 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_run1+0x153/0x2d0 kernel/trace/bpf_trace.c:1914
 trace_workqueue_activate_work+0x13e/0x1a0 include/trace/events/workqueue.h:59
 __queue_work+0x8ec/0xd50 kernel/workqueue.c:1521
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1491 [inline]
 __run_timers+0x550/0x7c0 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:rdtsc_ordered arch/x86/include/asm/msr.h:224 [inline]
RIP: 0010:delay_tsc+0x6d/0xc0 arch/x86/lib/delay.c:72
Code: 00 00 e8 16 0e 51 fd 65 8b 05 f7 0b 02 7c 85 c0 74 1c f3 90 bf 01 00 00 00 e8 6f 0c 51 fd e8 aa da a8 05 39 c5 75 0e 0f 01 f9 <66> 90 eb bd e8 8a 16 00 fd eb dd 4c 29 fb e8 90 da a8 05 89 c5 0f
RSP: 0018:ffffc900034efac0 EFLAGS: 00000246
RAX: 00000000db4beaef RBX: 0000000000002af9 RCX: 0000000000000000
RDX: 000000000000002b RSI: ffffffff8a59a4a0 RDI: ffffffff8a59a460
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff5200069df25
R10: fffff5200069df25 R11: 1ffff9200069df24 R12: dffffc0000000000
R13: ffffffff9612e800 R14: 0000002bdb4bd2e6 R15: 0000000000001741
 try_check_zero+0x2c7/0x340 kernel/rcu/srcutree.c:702
 srcu_advance_state kernel/rcu/srcutree.c:1227 [inline]
 process_srcu+0x195/0xc10 kernel/rcu/srcutree.c:1325
 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):
   0:	00 00                	add    %al,(%rax)
   2:	e8 16 0e 51 fd       	call   0xfd510e1d
   7:	65 8b 05 f7 0b 02 7c 	mov    %gs:0x7c020bf7(%rip),%eax        # 0x7c020c05
   e:	85 c0                	test   %eax,%eax
  10:	74 1c                	je     0x2e
  12:	f3 90                	pause
  14:	bf 01 00 00 00       	mov    $0x1,%edi
  19:	e8 6f 0c 51 fd       	call   0xfd510c8d
  1e:	e8 aa da a8 05       	call   0x5a8dacd
  23:	39 c5                	cmp    %eax,%ebp
  25:	75 0e                	jne    0x35
  27:	0f 01 f9             	rdtscp
* 2a:	66 90                	xchg   %ax,%ax <-- trapping instruction
  2c:	eb bd                	jmp    0xffffffeb
  2e:	e8 8a 16 00 fd       	call   0xfd0016bd
  33:	eb dd                	jmp    0x12
  35:	4c 29 fb             	sub    %r15,%rbx
  38:	e8 90 da a8 05       	call   0x5a8dacd
  3d:	89 c5                	mov    %eax,%ebp
  3f:	0f                   	.byte 0xf