rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=8a5/1/0x4000000000000002 softirq=26836/26837 fqs=5246 
	(detected by 1, t=10502 jiffies, g=40037, q=1409)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11484 Comm: kworker/u4:17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:perf_swevent_event+0x52d/0x540 kernel/events/core.c:9642
Code: e0 ff 85 db 75 13 4d 85 e4 74 0e e8 2d 6f e0 ff eb c4 e8 26 6f e0 ff eb 0c e8 1f 6f e0 ff eb 05 e8 18 6f e0 ff 48 83 c4 20 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 66 0f 1f 84 00 00 00 00 00 41 57 41
RSP: 0018:ffffc90000007790 EFLAGS: 00000086
RAX: ffffffff8198bc8f RBX: ffff8880b8e35250 RCX: ffff888054f3bb80
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90000007840 R08: ffffffff8e6d322f R09: 1ffffffff1cda645
R10: dffffc0000000000 R11: fffffbfff1cda646 R12: 0000000000000001
R13: ffff8880b8e351c8 R14: 1ffff1100efa6dac R15: 0000000000000007
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f1279cff8 CR3: 000000007329b000 CR4: 00000000003506f0
DR0: 0000200000000800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10059
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10033
 perf_trace_preemptirq_template+0x2aa/0x360 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:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 d2 f6 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007c60 EFLAGS: 00000206
RAX: 3be83f88b65dc900 RBX: 1ffff92000000f90 RCX: 3be83f88b65dc900
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc90000007d30 R08: ffffffff910471c7 R09: 1ffffffff2208e38
R10: dffffc0000000000 R11: fffffbfff2208e39 R12: ffffffff8d123400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 rebalance_domains+0x88d/0x9b0 kernel/sched/fair.c:10660
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 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:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:408
Code: 8a e8 a6 61 80 08 65 66 8b 05 ae 5d ba 7e 66 85 c0 75 54 bf 01 00 00 00 e8 8f 23 09 00 e8 0a 1e 36 00 fb 65 8b 05 5a 34 b9 7e <85> c0 75 05 e8 99 41 b7 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000376fa80 EFLAGS: 00000282
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 3be83f88b65dc900
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc9000376fb18 R08: ffffffff910471c7 R09: 1ffffffff2208e38
R10: dffffc0000000000 R11: fffffbfff2208e39 R12: ffffffff89a10011
R13: 1ffff1100c3b6223 R14: dffffc0000000000 R15: 1ffff920006edf50
 spin_unlock_bh include/linux/spinlock.h:409 [inline]
 batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1416
 batadv_tt_purge+0x31/0xa10 net/batman-adv/translation-table.c:3632
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>