------------[ cut here ]------------
WARNING: CPU: 1 PID: 718 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 718 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 0d f6 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 90 f2 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:ffffc90000dd0c20 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88801eed1dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff88801eed3548
R13: dffffc0000000000 R14: ffffc90000dd0c88 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc4b6139760 CR3: 000000000be8e000 CR4: 00000000003506e0
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_8848bede53a6b60e+0x34/0x1e4
 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
 __traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
 trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
 switch_mm_irqs_off+0x6e3/0x9a0 arch/x86/mm/tlb.c:-1
 flush_tlb_func+0x1bc/0x510 arch/x86/mm/tlb.c:773
 flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
 __sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
 sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:rcu_lockdep_current_cpu_online+0x90/0x130 kernel/rcu/tree.c:1173
Code: 58 00 48 8b 03 4c 8d b0 c0 b1 03 00 48 8d b8 d8 b1 03 00 48 89 f8 48 c1 e8 03 42 80 3c 38 00 74 05 e8 94 81 58 00 49 8b 5e 18 <49> 83 c6 20 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8
RSP: 0018:ffffc9000379f898 EFLAGS: 00000246
RAX: 1ffff1101722763b RBX: ffffffff8c120b80 RCX: 4375caf79e3eb900
RDX: 0000000000000000 RSI: ffffffff8a59e7e0 RDI: ffff8880b913b1d8
RBP: ffffc9000379f950 R08: dffffc0000000000 R09: fffffbfff1ff5426
R10: fffffbfff1ff5426 R11: 1ffffffff1ff5425 R12: ffff888077800800
R13: ffff88807f430000 R14: ffff8880b913b1c0 R15: dffffc0000000000
 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
 rcu_read_lock_bh_held+0x76/0xe0 kernel/rcu/update.c:334
 __dev_queue_xmit+0x8fb/0x2ed0 net/core/dev.c:4249
 batadv_send_skb_packet+0x384/0x5f0 net/batman-adv/send.c:108
 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline]
 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x696/0x840 net/batman-adv/bat_iv_ogm.c:1700
 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:	58                   	pop    %rax
   1:	00 48 8b             	add    %cl,-0x75(%rax)
   4:	03 4c 8d b0          	add    -0x50(%rbp,%rcx,4),%ecx
   8:	c0 b1 03 00 48 8d b8 	shlb   $0xb8,-0x72b7fffd(%rcx)
   f:	d8 b1 03 00 48 89    	fdivs  -0x76b7fffd(%rcx)
  15:	f8                   	clc
  16:	48 c1 e8 03          	shr    $0x3,%rax
  1a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  1f:	74 05                	je     0x26
  21:	e8 94 81 58 00       	call   0x5881ba
  26:	49 8b 5e 18          	mov    0x18(%r14),%rbx
* 2a:	49 83 c6 20          	add    $0x20,%r14 <-- trapping instruction
  2e:	4c 89 f0             	mov    %r14,%rax
  31:	48 c1 e8 03          	shr    $0x3,%rax
  35:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  3a:	74 08                	je     0x44
  3c:	4c 89 f7             	mov    %r14,%rdi
  3f:	e8                   	.byte 0xe8