------------[ cut here ]------------
WARNING: CPU: 0 PID: 5178 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5178 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 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 00 91 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:ffffc90000007bb0 EFLAGS: 00010006
RAX: ffffffff81a08ea0 RBX: 0000000000000000 RCX: ffff88807c535940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807c535947 R09: 1ffff1100f8a6b28
R10: dffffc0000000000 R11: ffffed100f8a6b29 R12: ffff88807c5370c8
R13: 00007ffffffff000 R14: ffffc90000007be8 R15: 0000000020000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005cee5000 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_8fc34fd13f997abc+0x3d/0x7c4
 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+0x163/0x2e0 kernel/trace/bpf_trace.c:1915
 trace_hrtimer_start include/trace/events/timer.h:199 [inline]
 debug_activate kernel/time/hrtimer.c:466 [inline]
 enqueue_hrtimer+0x314/0x370 kernel/time/hrtimer.c:1069
 __run_hrtimer kernel/time/hrtimer.c:1702 [inline]
 __hrtimer_run_queues+0x5f3/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/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:lock_acquire+0x6/0x400 kernel/locking/lockdep.c:5591
Code: 00 e9 2b fb ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 8b 05 b1 6d a5 7e a9 00 ff ff 00 0f 95 c0 c3 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00 00 4c 89 4c 24
RSP: 0018:ffffc900030dfbb8 EFLAGS: 00000246

RAX: ffffffff8990fc0a RBX: dffffc0000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8c31eaa0
RBP: ffffc900030dfbc0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1b13b16 R12: 000000000000009d
R13: ffff888024d644e8 R14: ffff88807d944c80 R15: ffff88802b681490
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0xc9/0x5c0 net/batman-adv/network-coding.c:723
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
irq event stamp: 110176
hardirqs last  enabled at (110175): [<ffffffff89c5582f>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last  enabled at (110175): [<ffffffff89c5582f>] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202
hardirqs last disabled at (110176): [<ffffffff89bbe22a>] sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1108
softirqs last  enabled at (110170): [<ffffffff8990ee66>] spin_unlock_bh include/linux/spinlock.h:409 [inline]
softirqs last  enabled at (110170): [<ffffffff8990ee66>] batadv_nc_purge_paths+0x316/0x3b0 net/batman-adv/network-coding.c:475
softirqs last disabled at (110168): [<ffffffff8990ec37>] spin_lock_bh include/linux/spinlock.h:369 [inline]
softirqs last disabled at (110168): [<ffffffff8990ec37>] batadv_nc_purge_paths+0xe7/0x3b0 net/batman-adv/network-coding.c:446
---[ end trace d3b12b28a1d6c38b ]---
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e9 2b fb ff ff       	jmp    0xfffffb30
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00
   f:	0f 1f 40 00          	nopl   0x0(%rax)
  13:	65 8b 05 b1 6d a5 7e 	mov    %gs:0x7ea56db1(%rip),%eax        # 0x7ea56dcb
  1a:	a9 00 ff ff 00       	test   $0xffff00,%eax
  1f:	0f 95 c0             	setne  %al
  22:	c3                   	ret
  23:	55                   	push   %rbp
  24:	48 89 e5             	mov    %rsp,%rbp
  27:	41 57                	push   %r15
* 29:	41 56                	push   %r14 <-- trapping instruction
  2b:	41 55                	push   %r13
  2d:	41 54                	push   %r12
  2f:	53                   	push   %rbx
  30:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  34:	48 81 ec e0 00 00 00 	sub    $0xe0,%rsp
  3b:	4c                   	rex.WR
  3c:	89                   	.byte 0x89
  3d:	4c                   	rex.WR
  3e:	24                   	.byte 0x24