rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=576/1/0x4000000000000004 softirq=255129/255130 fqs=3316 
rcu: 	 (t=10500 jiffies g=361653 q=1185)
rcu: rcu_preempt kthread starved for 3838 jiffies! g361653 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29104    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3474
 schedule+0x92/0x1c0 kernel/sched/core.c:3518
 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1804
 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
NMI backtrace for cpu 0
CPU: 0 PID: 1343 Comm: udevd Not tainted 4.19.72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682
 update_process_times+0x32/0x80 kernel/time/timer.c:1636
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:__list_add_valid+0x10/0xa0 lib/list_debug.c:22
Code: 82 87 e8 33 fd ff ff 41 5c 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 55 <49> 89 fd 48 8d 7a 08 41 54 49 89 d4 48 89 fa 48 83 ec 08 48 c1 ea
RSP: 0000:ffff8880ae806f20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff88801b476bf8 RCX: ffffffff858e7de6
RDX: ffff88801b476c90 RSI: ffff88801b476c90 RDI: ffff88801b476bf8
RBP: ffff8880ae806f28 R08: ffff88801fce4380 R09: 0000000000000007
R10: ffff88801fce4d18 R11: 00000000e3a4c30f R12: dffffc0000000000
R13: ffff88801b476940 R14: ffff88801b476c98 R15: ffff88801b476c90
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 list_move_tail include/linux/list.h:183 [inline]
 hhf_dequeue+0x652/0xa00 net/sched/sch_hhf.c:438
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 br_dev_queue_push_xmit+0x405/0x5d0 net/bridge/br_forward.c:56
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 br_forward_finish+0xfa/0x400 net/bridge/br_forward.c:69
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 __br_forward+0x647/0xb30 net/bridge/br_forward.c:113
 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:129
 maybe_deliver net/bridge/br_forward.c:184 [inline]
 maybe_deliver net/bridge/br_forward.c:172 [inline]
 br_flood+0x4da/0x710 net/bridge/br_forward.c:226
 br_dev_xmit+0xeeb/0x1490 net/bridge/br_device.c:103
 __netdev_start_xmit include/linux/netdevice.h:4303 [inline]
 netdev_start_xmit include/linux/netdevice.h:4312 [inline]
 xmit_one net/core/dev.c:3257 [inline]
 dev_hard_start_xmit+0x1a5/0x980 net/core/dev.c:3273
 __dev_queue_xmit+0x2704/0x2fe0 net/core/dev.c:3843
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 mld_sendpack+0x9d3/0xeb0 net/ipv6/mcast.c:1684
 mld_send_cr net/ipv6/mcast.c:1980 [inline]
 mld_ifc_timer_expire+0x449/0x8a0 net/ipv6/mcast.c:2479
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0033:0x7fcf13b641f1
Code: ff c7 f6 c2 02 74 12 0f b7 0e 66 89 0f 48 83 c6 02 48 83 c7 02 0f 1f 40 00 f6 c2 04 74 0c 8b 0e 89 0f 48 83 c6 04 48 83 c7 04 <f6> c2 08 74 0e 48 8b 0e 48 89 0f 48 83 c6 08 48 83 c7 08 81 e2 f0
RSP: 002b:00007ffddd1a3868 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 000000000217a020 RBX: 00000000021bcd30 RCX: 0000000000000055
RDX: 0000000000000009 RSI: 000000000216d351 RDI: 000000000217a021
RBP: 0000000002182d00 R08: 000000000217a010 R09: 0000000000000000
R10: 000000000216d030 R11: 00007fcf13b5ec81 R12: 000000000216d370
R13: 000000000216d350 R14: ffffffffffffffff R15: 000000000000000b