rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9
	(detected by 0, t=10502 jiffies, g=16677, q=2162 ncpus=2)
task:kworker/u4:0    state:R  running task     stack:0     pid:9     ppid:2      flags:0x00000008
Workqueue: netns cleanup_net
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 sched_show_task+0x438/0x570 kernel/sched/core.c:8942
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
 print_other_cpu_stall+0x1ab8/0x22e0 kernel/rcu/tree_stall.h:606
 check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
 rcu_pending kernel/rcu/tree.c:3891 [inline]
 rcu_sched_clock_irq+0x195c/0x1c54 kernel/rcu/tree.c:2394
 update_process_times+0x15c/0x1f4 kernel/time/timer.c:1869
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x340/0x4f8 kernel/time/tick-sched.c:1501
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x484/0xdc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x2c0/0xb64 kernel/time/hrtimer.c:1815
 timer_handler drivers/clocksource/arm_arch_timer.c:655 [inline]
 arch_timer_handler_virt+0x74/0x88 drivers/clocksource/arm_arch_timer.c:666
 handle_percpu_devid_irq+0x174/0x354 kernel/irq/chip.c:930
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq_desc kernel/irq/irqdesc.c:652 [inline]
 generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:708
 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:737 [inline]
 __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:788 [inline]
 gic_handle_irq+0x70/0x1e4 drivers/irqchip/irq-gic-v3.c:832
 do_interrupt_handler+0xe0/0x138 arch/arm64/kernel/entry-common.c:276
 __el1_irq arch/arm64/kernel/entry-common.c:471 [inline]
 el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
 __debug_check_no_obj_freed lib/debugobjects.c:987 [inline]
 debug_check_no_obj_freed+0x45c/0x478 lib/debugobjects.c:1008
 slab_free_hook mm/slub.c:1699 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x258/0x4b4 mm/slub.c:3674
 kfree+0xcc/0x1b8 mm/slab_common.c:988
 skb_free_head net/core/skbuff.c:762 [inline]
 skb_release_data+0x488/0x6b0 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 consume_skb+0xa0/0x178 net/core/skbuff.c:1035
 mac80211_hwsim_tx_frame+0x1cc/0x1f8 drivers/net/wireless/mac80211_hwsim.c:2054
 mac80211_hwsim_beacon_tx+0x500/0x94c drivers/net/wireless/mac80211_hwsim.c:2116
 __iterate_interfaces+0x204/0x484 net/mac80211/util.c:788
 ieee80211_iterate_active_interfaces_atomic+0xd4/0x180 net/mac80211/util.c:824
 mac80211_hwsim_beacon+0xcc/0x1c8 drivers/net/wireless/mac80211_hwsim.c:2142
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x4b0/0xdc0 kernel/time/hrtimer.c:1753
 hrtimer_run_softirq+0x158/0x21c kernel/time/hrtimer.c:1770
 handle_softirqs+0x318/0xd58 kernel/softirq.c:571
 __do_softirq+0x14/0x20 kernel/softirq.c:605
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:654
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:666
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 __rcu_read_unlock+0x88/0x13c kernel/rcu/tree_plugin.h:431
 xa_get_mark+0x4d0/0x550
 devlinks_xa_find_get+0x124/0x2dc net/devlink/leftover.c:308
 devlinks_xa_find_get_first net/devlink/leftover.c:328 [inline]
 devlink_pernet_pre_exit+0xc8/0x2fc net/devlink/leftover.c:12518
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x488/0x994 net/core/net_namespace.c:592
 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864