rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=4ca/1/0x4000000000000002 softirq=86747/86748 fqs=5249 
	(t=10502 jiffies g=88313 q=2146)
NMI backtrace for cpu 1
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc8+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2736 [inline]
 rcu_sched_clock_irq+0xb95/0x16d0 kernel/rcu/tree.c:2183
 update_process_times+0x134/0x190 kernel/time/timer.c:1639
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x403/0x850 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1131
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:__list_add include/linux/list.h:64 [inline]
RIP: 0010:list_add_tail include/linux/list.h:93 [inline]
RIP: 0010:list_move_tail include/linux/list.h:214 [inline]
RIP: 0010:hhf_dequeue+0x55f/0xaa0 net/sched/sch_hhf.c:439
Code: 84 c0 74 75 e8 d2 2b 67 fb 42 80 3c 23 00 48 8b 5d b0 74 08 48 89 df e8 8f 27 a0 fb 48 8b 45 c0 48 89 03 48 89 c3 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 72 27 a0 fb 48 8b 45 a8 48 89 03
RSP: 0018:ffff8880a98ff320 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1101298a72f RBX: ffff888094c53978 RCX: ffff8880a98f4480
RDX: 0000000000000000 RSI: ffff888094c53a10 RDI: ffff888094c53978
RBP: ffff8880a98ff3c8 R08: ffffffff860c5d6a R09: 0000000000000000
R10: fffffbfff117be8d R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888094c53680 R14: ffff888094c53a10 R15: ffff888094c53a00
 dequeue_skb net/sched/sch_generic.c:258 [inline]
 qdisc_restart net/sched/sch_generic.c:361 [inline]
 __qdisc_run+0x217/0x1b30 net/sched/sch_generic.c:379
 __dev_xmit_skb net/core/dev.c:3533 [inline]
 __dev_queue_xmit+0x1161/0x3020 net/core/dev.c:3838
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3902
 bond_dev_queue_xmit+0xde/0x2e0 drivers/net/bonding/bond_main.c:255
 bond_xmit_slave_id+0x615/0x620 drivers/net/bonding/bond_main.c:3816
 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3905 [inline]
 __bond_start_xmit drivers/net/bonding/bond_main.c:4168 [inline]
 bond_start_xmit+0xd0a/0x13b0 drivers/net/bonding/bond_main.c:4202
 __netdev_start_xmit include/linux/netdevice.h:4406 [inline]
 netdev_start_xmit include/linux/netdevice.h:4420 [inline]
 xmit_one net/core/dev.c:3280 [inline]
 dev_hard_start_xmit+0x1c1/0x3f0 net/core/dev.c:3296
 __dev_queue_xmit+0x1e86/0x3020 net/core/dev.c:3869
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3902
 neigh_hh_output include/net/neighbour.h:500 [inline]
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0xff2/0x13d0 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x693/0x910 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x52/0x1e0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x26f/0x390 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 mld_sendpack+0x770/0xb90 net/ipv6/mcast.c:1682
 mld_send_initial_cr+0x24c/0x2c0 net/ipv6/mcast.c:2099
 ipv6_mc_dad_complete+0x70/0x350 net/ipv6/mcast.c:2106
 addrconf_dad_completed+0x72b/0xc00 net/ipv6/addrconf.c:4176
 addrconf_dad_work+0xba1/0x1c20 net/ipv6/addrconf.c:3962
 process_one_work+0x7ef/0x10e0 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352