IPVS: set_ctl: invalid protocol: 137 127.0.0.1:20002
IPVS: set_ctl: invalid protocol: 137 127.0.0.1:20002
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=a56/1/0x4000000000000002 softirq=245005/245005 fqs=5234 
rcu: 	 (t=10500 jiffies g=377945 q=1584)
NMI backtrace for cpu 0
CPU: 0 PID: 24688 Comm: kworker/0:3 Not tainted 4.20.0+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events xfrm_hash_rebuild
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 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+0x183/0x1cf kernel/rcu/tree.c:1211
 print_cpu_stall.cold+0x227/0x40c kernel/rcu/tree.c:1348
 check_cpu_stall kernel/rcu/tree.c:1422 [inline]
 rcu_pending kernel/rcu/tree.c:3018 [inline]
 rcu_check_callbacks+0xb32/0x1380 kernel/rcu/tree.c:2521
 update_process_times+0x32/0x80 kernel/time/timer.c:1635
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:write_comp_data+0x9/0x70 kernel/kcov.c:122
Code: 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 ee 01 00 <65> 8b 05 20 f8 7f 7e a9 00 01 1f 00 75 51 41 8b 80 d8 12 00 00 83
RSP: 0018:ffff888098b27668 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff8880879ba680 RBX: 0000000000000001 RCX: ffffffff86be02d3
RDX: 0000000000000001 RSI: 000000000000000e RDI: 0000000000000005
RBP: ffff888098b27670 R08: ffff8880879ba680 R09: 0000000000000005
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88806da4458c R14: ffff8880a4e4458c R15: 00000000000001ff
 selector_cmp net/xfrm/xfrm_policy.c:1390 [inline]
 xfrm_policy_insert_list+0x623/0xfb0 net/xfrm/xfrm_policy.c:1534
 xfrm_policy_inexact_insert+0x155/0xda0 net/xfrm/xfrm_policy.c:1195
 xfrm_hash_rebuild+0xea2/0x12c0 net/xfrm/xfrm_policy.c:1317
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10744 jiffies s: 31673 root: 0x1/.
rcu: blocking rcu_node structures:
Task dump for CPU 0:
kworker/0:3     R  running task    26472 24688      2 0x80000008
Workqueue: events xfrm_hash_rebuild
Call Trace:
 context_switch kernel/sched/core.c:2834 [inline]
 __schedule+0x89f/0x1e90 kernel/sched/core.c:3472
 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:72 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:87 [inline]
 do_raw_spin_lock+0x156/0x360 kernel/locking/spinlock_debug.c:113