rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15 P5250/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=17633, q=3328 ncpus=2)
task:dhcpcd          state:D stack:21512 pid:5250  tgid:5250  ppid:5249   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5526 [inline]
 __schedule+0x16d9/0x5700 kernel/sched/core.c:7276
 __schedule_loop kernel/sched/core.c:7353 [inline]
 schedule_rtlock+0x30/0x70 kernel/sched/core.c:7432
 rtlock_slowlock_locked+0x35c9/0x3c20 kernel/locking/rtmutex.c:1895
 rtlock_slowlock kernel/locking/rtmutex.c:1922 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 tasklet_lock_callback kernel/softirq.c:900 [inline]
 tasklet_action_common+0xc5/0x600 kernel/softirq.c:950
 handle_softirqs+0x1da/0x6d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 __local_bh_enable_ip+0x16f/0x2b0 kernel/softirq.c:325
 sockopt_release_sock net/core/sock.c:1162 [inline]
 sk_setsockopt+0x2622/0x2c40 net/core/sock.c:1680
 unix_setsockopt+0x15f/0x340 net/unix/af_unix.c:943
 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2397
 __sys_setsockopt net/socket.c:2422 [inline]
 __do_sys_setsockopt net/socket.c:2428 [inline]
 __se_sys_setsockopt net/socket.c:2425 [inline]
 __x64_sys_setsockopt+0x143/0x1b0 net/socket.c:2425
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f72bc5525aa
RSP: 002b:00007ffc23643c68 EFLAGS: 00000283 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f72bc5525aa
RDX: 0000000000000007 RSI: 0000000000000001 RDI: 0000000000000019
RBP: 0000000000000019 R08: 0000000000000004 R09: 0000000000000001
R10: 00007ffc23643c7c R11: 0000000000000283 R12: 00007ffc23643ce0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000555af1ed7ac0
 </TASK>
task:ksoftirqd/0     state:R  running task     stack:22456 pid:15    tgid:15    ppid:2      task_flags:0x4208040 flags:0x00080000
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8242
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xfbf/0x1350 kernel/rcu/tree_stall.h:683
 check_cpu_stall kernel/rcu/tree_stall.h:860 [inline]
 rcu_pending kernel/rcu/tree.c:3744 [inline]
 rcu_sched_clock_irq+0x9fe/0x10e0 kernel/rcu/tree.c:2749
 update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
 tick_sched_handle kernel/time/tick-sched.c:296 [inline]
 tick_nohz_handler+0x38f/0x6b0 kernel/time/tick-sched.c:317
 __run_hrtimer kernel/time/hrtimer.c:2067 [inline]
 __hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:2124
 hrtimer_interrupt+0x4c2/0xa80 kernel/time/hrtimer.c:2243
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rb_event_length+0xd9/0x400 kernel/trace/ring_buffer.c:213
Code: 13 0f 8f 9e 00 00 00 83 fb 11 0f 8f 18 01 00 00 83 fb 10 0f 85 d4 01 00 00 e8 d3 0e fe ff 8d 04 9d 00 00 00 00 e9 d5 02 00 00 <83> fb 0b 0f 8f 95 00 00 00 83 fb 09 0f 8f 06 01 00 00 83 fb 08 0f
RSP: 0018:ffffc90000146c18 EFLAGS: 00000206
RAX: 0000000000000020 RBX: 000000000000000a RCX: 0000000000000005
RDX: ffffffff81c88415 RSI: ffffffff8e2272c0 RDI: 000000000000000a
RBP: 0000000000000b78 R08: ffff88801ce81f40 R09: 0000000000000020
R10: 0000000000000100 R11: 000000000000001f R12: dffffc0000000000
R13: 0000000000000b78 R14: ffff888031e25b88 R15: 000000000011c60a
 rb_read_data_buffer+0xe2/0x5b0 kernel/trace/ring_buffer.c:1938
 check_buffer+0x288/0x860 kernel/trace/ring_buffer.c:4773
 __rb_reserve_next+0x549/0xdd0 kernel/trace/ring_buffer.c:4874
 rb_reserve_next_event kernel/trace/ring_buffer.c:5011 [inline]
 ring_buffer_lock_reserve+0xc0d/0x10c0 kernel/trace/ring_buffer.c:5070
 __trace_buffer_lock_reserve kernel/trace/trace.h:1676 [inline]
 trace_event_buffer_lock_reserve+0x1d4/0x700 kernel/trace/trace.c:1924
 trace_event_buffer_reserve+0x1ef/0x2d0 kernel/trace/trace_events.c:715
 do_trace_event_raw_event_lock_acquire include/trace/events/lock.h:23 [inline]
 trace_event_raw_event_lock_acquire+0x12c/0x2e0 include/trace/events/lock.h:23
 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline]
 trace_lock_acquire include/trace/events/lock.h:23 [inline]
 lock_acquire+0x303/0x350 kernel/locking/lockdep.c:5905
 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 wiphy_work_queue+0xbc/0x380 net/wireless/core.c:1886
 __ieee80211_queue_skb_to_iface+0xef/0x290 net/mac80211/rx.c:239
 ieee80211_queue_skb_to_iface net/mac80211/rx.c:261 [inline]
 ieee80211_rx_h_mgmt+0x422/0x5a0 net/mac80211/rx.c:4207
 ieee80211_rx_handlers+0x75a7/0xc8d0 net/mac80211/rx.c:4284
 ieee80211_invoke_rx_handlers+0xe9a/0x2a00 net/mac80211/rx.c:4314
 ieee80211_prepare_and_rx_handle+0xe04/0x4b30 net/mac80211/rx.c:-1
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5547 [inline]
 ieee80211_rx_list+0x2e99/0x3b40 net/mac80211/rx.c:5720
 ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5743
 ieee80211_rx include/net/mac80211.h:5449 [inline]
 ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452
 tasklet_action_common+0x31c/0x600 kernel/softirq.c:961
 handle_softirqs+0x1da/0x6d0 kernel/softirq.c:645
 run_ksoftirqd+0x53/0x190 kernel/softirq.c:1099
 smpboot_thread_fn+0x565/0xa70 kernel/smpboot.c:160
 kthread+0x38b/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>