rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
------------[ cut here ]------------
IRQs not enabled as expected
WARNING: CPU: 0 PID: 18269 at kernel/sched/core.c:2698 try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 18269 Comm: kworker/u4:11 Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:542
RIP: 0010:try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698
Code: ff d4 41 89 c6 e9 18 ff ff ff 80 3d e6 f5 58 09 00 0f 85 6f fe ff ff 48 c7 c7 80 41 4b 88 c6 05 d2 f5 58 09 01 e8 b3 47 f4 ff <0f> 0b e9 55 fe ff ff 4c 89 04 24 4c 89 ee 48 89 ef 41 ff d4 4c 8b
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff92000000f7d RCX: 0000000000000000
RDX: ffff8881f3ee6200 RSI: ffffffff815d4f87 RDI: fffff52000000f6d
RBP: ffff8881e775a000 R08: 0000000000000001 R09: ffff8880ae620fcb
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8160c5c0
R13: ffffc90000007d00 R14: ffff8881f3ee6200 R15: ffff8880ae636c00
 rcu_print_task_stall kernel/rcu/tree_stall.h:269 [inline]
 print_other_cpu_stall kernel/rcu/tree_stall.h:477 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:636 [inline]
 rcu_pending kernel/rcu/tree.c:3489 [inline]
 rcu_sched_clock_irq.cold+0x92e/0xccc kernel/rcu/tree.c:2504
 update_process_times+0x25/0x60 kernel/time/timer.c:1726
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:__local_bh_enable_ip+0xf9/0x250 kernel/softirq.c:171
Code: 00 41 8b 84 24 88 08 00 00 85 c0 0f 84 b9 00 00 00 48 c7 c0 88 e0 b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 2c 01 00 00 48 83 3d d1 5a 6e 08 00 0f 84 c7 00 00 00 fa 66
RSP: 0018:ffffc9001e9b7bf0 EFLAGS: 00000246
RAX: 1ffffffff1369c11 RBX: 0000000000000201 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000201 RDI: ffff8881f3ee6a88
RBP: ffffffff87ca1d95 R08: 0000000000000000 R09: ffff888063e15543
R10: ffffed100c7c2aa8 R11: 0000000000000000 R12: ffff8881f3ee6200
R13: ffff888063dd8bc0 R14: dffffc0000000000 R15: ffffffff87ca2130
 spin_unlock_bh include/linux/spinlock.h:398 [inline]
 batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:470
 batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:721
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled
Rebooting in 86400 seconds..