IPVS: ftp: loaded support on port[0] = 21 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=392/1/0x4000000000000002 softirq=20255/20256 fqs=5233 rcu: (t=10500 jiffies g=19881 q=769) NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.72 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __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:__list_add_valid+0x27/0xa0 lib/list_debug.c:23 Code: 90 90 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 55 49 89 fd 48 8d 7a 08 41 54 49 89 d4 48 89 fa 48 83 ec 08 48 c1 ea 03 <80> 3c 02 00 75 52 49 8b 54 24 08 48 39 f2 0f 85 5a 01 00 00 48 b8 RSP: 0018:ffff8880ae806b10 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88808623f978 RCX: ffffffff858e7de6 RDX: 1ffff11010c47f43 RSI: ffff88808623fa10 RDI: ffff88808623fa18 RBP: ffff8880ae806b28 R08: ffff8880aa25e380 R09: 000000000000000a R10: ffff8880aa25ed90 R11: 00000000f40a389c R12: ffff88808623fa10 R13: ffff88808623f978 R14: ffff88808623fa18 R15: ffff88808623fa10 __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] list_move_tail include/linux/list.h:183 [inline] hhf_dequeue+0x652/0xa00 net/sched/sch_hhf.c:438 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 br_nf_dev_queue_xmit+0x365/0x1610 net/bridge/br_netfilter_hooks.c:779 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] br_nf_post_routing+0x76f/0x12f0 net/bridge/br_netfilter_hooks.c:825 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_forward_finish+0x215/0x400 net/bridge/br_forward.c:69 br_nf_hook_thresh+0x2e9/0x370 net/bridge/br_netfilter_hooks.c:1008 br_nf_forward_finish+0x356/0x700 net/bridge/br_netfilter_hooks.c:553 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] br_nf_forward_ip net/bridge/br_netfilter_hooks.c:620 [inline] br_nf_forward_ip+0x6b4/0x17c0 net/bridge/br_netfilter_hooks.c:564 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] __br_forward+0x393/0xb30 net/bridge/br_forward.c:113 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:129 br_flood+0x5fa/0x710 net/bridge/br_forward.c:238 br_handle_frame_finish+0xf72/0x1510 net/bridge/br_input.c:167 br_nf_hook_thresh+0x2e9/0x370 net/bridge/br_netfilter_hooks.c:1008 br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 net/bridge/br_netfilter_ipv6.c:210 NF_HOOK include/linux/netfilter.h:289 [inline] br_nf_pre_routing_ipv6+0x4a5/0x8ca net/bridge/br_netfilter_ipv6.c:240 br_nf_pre_routing+0x1016/0x159c net/bridge/br_netfilter_hooks.c:494 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_handle_frame+0x985/0x1480 net/bridge/br_input.c:306 __netif_receive_skb_core+0xac1/0x3570 net/core/dev.c:4861 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:4930 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5044 process_backlog+0x23a/0x7a0 net/core/dev.c:5855 napi_poll net/core/dev.c:6278 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6344 __do_softirq+0x25c/0x921 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1091 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:721 [inline] ip6_finish_output2+0xbd2/0x2550 net/ipv6/ip6_output.c:121 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_ns+0x3a9/0x850 net/ipv6/ndisc.c:633 addrconf_dad_work+0xb88/0x1150 net/ipv6/addrconf.c:4062 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 audit: type=1400 audit(1568139426.874:70): avc: denied { map } for pid=9635 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1