RDX: 00000000000002cb RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f554ae956d4
R13: 00000000004c710d R14: 00000000004dc810 R15: 0000000000000005
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10503 ticks this GP) idle=832/0/0x3 softirq=41745/41746 fqs=255 
rcu: 	 (t=10500 jiffies g=48189 q=117)
rcu: rcu_preempt kthread starved for 9989 jiffies! g48189 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: 0 Comm: swapper/0 Not tainted 4.19.71 #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:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x50 kernel/kcov.c:101
Code: 08 00 00 00 00 e9 ca e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 <65> 8b 15 28 87 96 7e 81 e2 00 01 1f 00 75 2b 8b 90 d0 12 00 00 83
RSP: 0018:ffff8880ae806f08 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13
RAX: ffffffff88679ec0 RBX: ffff8880a15aa778 RCX: ffffffff858e8489
RDX: ffff8880a15aa740 RSI: ffffffff858e8907 RDI: 0000000000000005
RBP: ffff8880ae806f08 R08: ffffffff88679ec0 R09: 0000000000000007
R10: ffffffff8867a858 R11: 00000000069ef6f8 R12: dffffc0000000000
R13: ffff8880a15aa4c0 R14: 0000000000000001 R15: 0000000000000000
 hhf_dequeue+0x537/0xa00 net/sched/sch_hhf.c:435
 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_hh_output include/net/neighbour.h:491 [inline]
 neigh_output include/net/neighbour.h:499 [inline]
 ip6_finish_output2+0x12fd/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]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 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: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: ff ff 48 89 df e8 82 1b ae fa eb 82 e9 07 00 00 00 0f 00 2d a4 fc 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 94 fc 53 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 ce fd 65 fa e8 39
RSP: 0018:ffffffff88607ca8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48c4 RBX: ffffffff88679ec0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff8867a73c
RBP: ffffffff88607cd8 R08: ffffffff88679ec0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88724610 R14: 0000000000000000 R15: 0000000000000000
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:556
 default_idle_call+0x36/0x90 kernel/sched/idle.c:93
 cpuidle_idle_call kernel/sched/idle.c:153 [inline]
 do_idle+0x377/0x560 kernel/sched/idle.c:262
 cpu_startup_entry+0xc8/0xe0 kernel/sched/idle.c:368
 rest_init+0x219/0x222 init/main.c:442
 start_kernel+0x88c/0x8c5 init/main.c:738
 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472
 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:453
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243