ip6_tunnel:  xmit: Local address not yet configured! INFO: rcu_sched self-detected stall on CPU INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (115119 ticks this GP) idle=5ba/140000000000001/0 softirq=817638/817638 fqs=33 (detected by 0, t=125002 jiffies, g=423650, c=423649, q=2164) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 4.14.0-rc8+ #116 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d9f92440 task.stack: ffff8801d9f98000 RIP: 0010:rep_nop arch/x86/include/asm/processor.h:635 [inline] RIP: 0010:delay_tsc+0x41/0x70 arch/x86/lib/delay.c:67 RSP: 0018:ffff8801db306ff0 EFLAGS: 00000003 RAX: 000002f09f8ec2ae RBX: ffffffff87ac7880 RCX: 000002f09f8ebdcd RDX: 00000000000004e1 RSI: 0000000000000001 RDI: 00000000000008fd RBP: ffff8801db306ff0 R08: ffffffff8289d6a6 R09: 0000000000000001 R10: ffff8801db306f78 R11: ffffffff87ac7898 R12: 000000000000270b R13: 0000000000000020 R14: fffffbfff0f58f56 R15: fffffbfff0f58f19 FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe20b5fff8 CR3: 0000000005c22000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __delay arch/x86/lib/delay.c:161 [inline] __const_udelay+0x5b/0x70 arch/x86/lib/delay.c:175 wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:2048 serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3174 uart_console_write+0xac/0xe0 drivers/tty/serial/serial_core.c:1872 serial8250_console_write+0x647/0xa20 drivers/tty/serial/8250/8250_port.c:3240 univ8250_console_write+0x64/0x80 drivers/tty/serial/8250/8250_core.c:597 call_console_drivers kernel/printk/printk.c:1574 [inline] console_unlock+0x812/0xd80 kernel/printk/printk.c:2233 vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757 vprintk_default+0x28/0x30 kernel/printk/printk.c:1796 vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:382 printk+0xaa/0xca kernel/printk/printk.c:1829 print_cpu_stall_info_begin kernel/rcu/tree_plugin.h:1657 [inline] print_cpu_stall kernel/rcu/tree.c:1530 [inline] check_cpu_stall.isra.64+0x817/0x1480 kernel/rcu/tree.c:1610 __rcu_pending kernel/rcu/tree.c:3373 [inline] rcu_pending kernel/rcu/tree.c:3435 [inline] rcu_check_callbacks+0x256/0xce0 kernel/rcu/tree.c:2775 update_process_times+0x30/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1190 __run_hrtimer kernel/time/hrtimer.c:1213 [inline] __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1277 hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1311 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] smp_apic_timer_interrupt+0x156/0x710 arch/x86/kernel/apic/apic.c:1057 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:771 RIP: 0010:rep_nop arch/x86/include/asm/processor.h:635 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:640 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:64 [inline] RIP: 0010:native_queued_spin_lock_slowpath+0x1c4/0xfa0 kernel/locking/qspinlock.c:305 RSP: 0018:ffff8801d9f9f350 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: ffff8801c661f888 RCX: dffffc0000000000 RDX: 0000000000000004 RSI: ffff8801d9f9f420 RDI: ffff8801c661f888 RBP: ffff8801d9f9f6c8 R08: ffffffff848d2e83 R09: 0000000000000000 R10: ffff8801d9f9f5e8 R11: ffff8801c661f8a0 R12: ffffed003b3f3e84 R13: 1ffff1003b3f3e70 R14: ffff8801d9f9f6a0 R15: 0000000000000003 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:29 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x185/0x220 kernel/locking/spinlock_debug.c:113 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x32/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] sctp_generate_heartbeat_event+0xa3/0x3f0 net/sctp/sm_sideeffect.c:386 call_timer_fn+0x233/0x830 kernel/time/timer.c:1281 expire_timers kernel/time/timer.c:1320 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1620 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1646 __do_softirq+0x2d7/0xb85 kernel/softirq.c:284 run_ksoftirqd+0x50/0x100 kernel/softirq.c:676 smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 kthread+0x35e/0x430 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:432 Code: 31 48 c1 e2 20 48 89 d1 48 09 c1 0f ae e8 0f 31 48 c1 e2 20 48 09 d0 48 89 c2 48 29 ca 48 39 fa 73 25 65 ff 0d f1 c1 17 7b f3 90 <65> ff 05 e8 c1 17 7b 65 8b 15 b9 8e 17 7b 39 f2 74 ce 48 29 c1 rcu_sched kthread starved for 124864 jiffies! g423650 c423649 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 23888 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2790 [inline] __schedule+0x8eb/0x2060 kernel/sched/core.c:3366 schedule+0xf5/0x430 kernel/sched/core.c:3425 schedule_timeout+0x150/0x250 kernel/time/timer.c:1743 rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2247 kthread+0x35e/0x430 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:432 1-...: (115119 ticks this GP) idle=5ba/140000000000001/0 softirq=817638/817638 fqs=33 (t=126129 jiffies g=423650 c=423649 q=2164) rcu_sched kthread starved for 125997 jiffies! g423650 c423649 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 23888 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2790 [inline] __schedule+0x8eb/0x2060 kernel/sched/core.c:3366 schedule+0xf5/0x430 kernel/sched/core.c:3425 schedule_timeout+0x150/0x250 kernel/time/timer.c:1743 rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2247 kthread+0x35e/0x430 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:432 NMI backtrace for cpu 1 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 4.14.0-rc8+ #116 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x122/0x180 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:156 [inline] rcu_dump_cpu_stacks+0x180/0x1d6 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall.isra.64+0xaae/0x1480 kernel/rcu/tree.c:1610 __rcu_pending kernel/rcu/tree.c:3373 [inline] rcu_pending kernel/rcu/tree.c:3435 [inline] rcu_check_callbacks+0x256/0xce0 kernel/rcu/tree.c:2775 update_process_times+0x30/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1190 __run_hrtimer kernel/time/hrtimer.c:1213 [inline] __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1277 hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1311 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] smp_apic_timer_interrupt+0x156/0x710 arch/x86/kernel/apic/apic.c:1057 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:771 RIP: 0010:rep_nop arch/x86/include/asm/processor.h:635 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:640 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:64 [inline] RIP: 0010:native_queued_spin_lock_slowpath+0x1c4/0xfa0 kernel/locking/qspinlock.c:305 RSP: 0018:ffff8801d9f9f350 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: ffff8801c661f888 RCX: dffffc0000000000 RDX: 0000000000000004 RSI: ffff8801d9f9f420 RDI: ffff8801c661f888 RBP: ffff8801d9f9f6c8 R08: ffffffff848d2e83 R09: 0000000000000000 R10: ffff8801d9f9f5e8 R11: ffff8801c661f8a0 R12: ffffed003b3f3e84 R13: 1ffff1003b3f3e70 R14: ffff8801d9f9f6a0 R15: 0000000000000003 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:29 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x185/0x220 kernel/locking/spinlock_debug.c:113 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x32/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] sctp_generate_heartbeat_event+0xa3/0x3f0 net/sctp/sm_sideeffect.c:386 call_timer_fn+0x233/0x830 kernel/time/timer.c:1281 expire_timers kernel/time/timer.c:1320 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1620 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1646 __do_softirq+0x2d7/0xb85 kernel/softirq.c:284 run_ksoftirqd+0x50/0x100 kernel/softirq.c:676 smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 kthread+0x35e/0x430 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:432