rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=3f3/1/0x4000000000000002 softirq=20212/20213 fqs=2100 
	(detected by 1, t=10505 jiffies, g=25697, q=1498)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline]
RIP: 0010:lock_release+0x7f2/0x870 kernel/locking/lockdep.c:5634
Code: 00 e8 72 b2 5f 00 89 d8 48 0f a3 05 d0 19 0d 0c 4d 89 f5 4d 89 e7 0f 83 de f8 ff ff 65 ff 05 5d ec a5 7e 48 8b 1d be b5 f9 0b <48> 85 db 74 2c 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74
RSP: 0018:ffffc90000007620 EFLAGS: 00000007
RAX: 0000000000000000 RBX: ffff88802a352c10 RCX: ffffffff815c834e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d699d28
RBP: ffffc90000007730 R08: dffffc0000000000 R09: fffffbfff1ad33a6
R10: fffffbfff1ad33a6 R11: 1ffffffff1ad33a5 R12: 1ffff92000000ed0
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000ed0
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6c6f069c8 CR3: 000000000be8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __perf_output_begin kernel/events/ring_buffer.c:262 [inline]
 perf_output_begin_forward+0x793/0xa30 kernel/events/ring_buffer.c:271
 __perf_event_output kernel/events/core.c:7804 [inline]
 perf_event_output_forward+0x15c/0x280 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline]
RIP: 0010:handle_softirqs+0x1a9/0x820 kernel/softirq.c:564
Code: 24 78 44 89 64 24 28 0f b7 db 48 c7 c7 80 04 0a 8a e8 5b 07 61 08 65 66 c7 05 51 21 bb 7e 00 00 e8 3c 72 35 00 fb 89 5c 24 34 <b8> ff ff ff ff 0f bc 44 24 34 41 89 c5 41 ff c5 0f 85 c1 00 00 00
RSP: 0018:ffffc90000007ee0 EFLAGS: 00000282
RAX: d5eda8becdcf4300 RBX: 0000000000000200 RCX: d5eda8becdcf4300
RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580
RBP: ffffc90000007fe8 R08: dffffc0000000000 R09: fffffbfff1ff7c37
R10: fffffbfff1ff7c37 R11: 1ffffffff1ff7c36 R12: 000000000000000a
R13: dffffc0000000000 R14: ffff88813fed0000 R15: dffffc0000000000
 do_softirq+0x13b/0x200 kernel/softirq.c:477
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x174/0x1b0 kernel/softirq.c:401
 spin_unlock_bh include/linux/spinlock.h:409 [inline]
 batadv_nc_purge_paths+0x316/0x3b0 net/batman-adv/network-coding.c:475
 batadv_nc_worker+0x327/0x5c0 net/batman-adv/network-coding.c:726
 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>