rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=3e6/1/0x4000000000000002 softirq=383964/383967 fqs=5239 rcu: (t=10500 jiffies g=493677 q=861) NMI backtrace for cpu 1 CPU: 1 PID: 23467 Comm: kworker/1:0 Not tainted 5.0.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events xfrm_hash_rebuild Call Trace: __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 RIP: 0010:xfrm_sec_ctx_match include/net/xfrm.h:970 [inline] RIP: 0010:xfrm_policy_insert_list+0x963/0xfb0 net/xfrm/xfrm_policy.c:1536 Code: ff ff ff 48 8b 9d 00 ff ff ff e8 48 c0 c3 fa 48 8b 85 40 ff ff ff 0f b6 10 48 8b 85 48 ff ff ff 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 a4 05 00 00 48 8b 85 50 ff ff ff 48 8d bb b4 00 00 00 RSP: 0018:ffff88809b62f680 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88808ca2a040 RCX: ffffffff86be3b58 RDX: 0000000000000000 RSI: ffffffff86be3ea8 RDI: 0000000000000004 RBP: ffff88809b62f780 R08: ffff88809e5f0200 R09: 0000000000000005 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff8880913e578c R14: ffff88808ca2a10c R15: 0000000000000000 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