INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (1 GPs behind) idle=89e/1/0 softirq=26330/26340 fqs=1016 (detected by 0, t=10503 jiffies, g=3890, c=3889, q=5) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.143 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a9d1c340 task.stack: ffff8880a9d28000 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xe/0x60 kernel/kcov.c:65 RSP: 0018:ffff8880aef075e8 EFLAGS: 00000282 RAX: ffff8880a9d1c340 RBX: ffff8880915f8b38 RCX: ffff8880915f8b00 RDX: ffff8880915f8b28 RSI: ffff8880915f8bd0 RDI: ffff8880915f8b48 RBP: ffff8880aef07640 R08: 0000000000000000 R09: ffff8880a9d1cca8 R10: ffff8880a9d1cc88 R11: ffff8880a9d1c340 R12: dffffc0000000000 R13: ffff8880915f8940 R14: 0000000000000001 R15: ffff8880915f8bc0 FS: 0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdca28efb8 CR3: 000000000766a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dequeue_skb net/sched/sch_generic.c:148 [inline] qdisc_restart net/sched/sch_generic.c:241 [inline] __qdisc_run+0x2b8/0xe00 net/sched/sch_generic.c:257 __dev_xmit_skb net/core/dev.c:3235 [inline] __dev_queue_xmit+0x1571/0x25e0 net/core/dev.c:3493 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558 neigh_resolve_output net/core/neighbour.c:1364 [inline] neigh_resolve_output+0x4d8/0x870 net/core/neighbour.c:1344 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0x9ab/0x21b0 net/ipv6/ip6_output.c:120 ip6_finish_output+0x4f4/0xb50 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x20f/0x6d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x129/0x680 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1634 [inline] __run_timers kernel/time/timer.c:1602 [inline] run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffff8880a9d2fe70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0ee2a84 RBX: ffff8880a9d1c340 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880a9d1cbbc RBP: ffff8880a9d2fe98 R08: 1ffffffff104a601 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87715410 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a9d1c340 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:557 default_idle_call+0x36/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x262/0x3d0 kernel/sched/idle.c:246 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:351 start_secondary+0x346/0x4b0 arch/x86/kernel/smpboot.c:272 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 Code: be 07 41 be f4 ff ff ff e8 13 3c ee ff 48 c7 05 d5 4f be 07 00 00 00 00 e9 2f ec ff ff 65 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a <65> 8b 15 4b 0b a5 7e 81 e2 00 01 1f 00 75 0b 8b 90 c8 12 00 00 rcu_sched kthread starved for 8462 jiffies! g3890 c3889 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 rcu_sched I29776 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1744 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404