IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 INFO: rcu_preempt self-detected stall on CPU 1-...: (1 GPs behind) idle=1f6/140000000000001/0 softirq=10868/10872 fqs=5 (t=10500 jiffies g=1138 c=1137 q=108) rcu_preempt kthread starved for 10490 jiffies! g1138 c1137 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29776 8 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 NMI backtrace for cpu 1 CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.142 #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:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline] rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792 update_process_times+0x31/0x70 kernel/time/timer.c:1588 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219 __run_hrtimer kernel/time/hrtimer.c:1220 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__sanitizer_cov_trace_pc+0x28/0x60 kernel/kcov.c:68 RSP: 0018:ffff8880a9d6f008 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a9d5e4c0 RBX: ffff88807e45f8b8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807e45f950 RDI: ffff88807e45f958 RBP: ffff8880a9d6f060 R08: 0000000000000000 R09: ffff8880a9d5eec8 R10: ffff8880a9d5eea8 R11: ffff8880a9d5e4c0 R12: dffffc0000000000 R13: ffff88807e45f6c0 R14: ffff88807e45f950 R15: ffff88807e45f940 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 br_dev_queue_push_xmit+0x367/0x530 net/bridge/br_forward.c:55 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] br_forward_finish+0xbc/0x320 net/bridge/br_forward.c:67 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] __br_forward+0x560/0x9c0 net/bridge/br_forward.c:111 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:127 maybe_deliver net/bridge/br_forward.c:168 [inline] maybe_deliver net/bridge/br_forward.c:156 [inline] br_flood+0x3c8/0x530 net/bridge/br_forward.c:210 br_dev_xmit+0x9a4/0xd40 net/bridge/br_device.c:83 __netdev_start_xmit include/linux/netdevice.h:4033 [inline] netdev_start_xmit include/linux/netdevice.h:4042 [inline] xmit_one net/core/dev.c:3009 [inline] dev_hard_start_xmit+0x18c/0x8b0 net/core/dev.c:3025 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525 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_ns+0x360/0x7e0 net/ipv6/ndisc.c:625 addrconf_dad_work+0xa40/0xff0 net/ipv6/addrconf.c:3996 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (1 GPs behind) idle=1f6/140000000000000/0 softirq=10868/10872 fqs=5 (detected by 0, t=10555 jiffies, g=791, c=790, q=8) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.142 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work task: ffff8880a9d5e4c0 task.stack: ffff8880a9d68000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:60 RSP: 0018:ffff8880a9d6f008 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88807e45f8b8 RCX: 0000000000000000 RDX: ffff88807e45f8b8 RSI: ffff88807e45f950 RDI: ffff88807e45f958 RBP: ffff8880a9d6f060 R08: 0000000000000000 R09: ffff8880a9d5eec8 R10: ffff8880a9d5eea8 R11: ffff8880a9d5e4c0 R12: dffffc0000000000 R13: ffff88807e45f6c0 R14: 0000000000000000 R15: ffff88807e45f940 FS: 0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000610 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 br_dev_queue_push_xmit+0x367/0x530 net/bridge/br_forward.c:55 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] br_forward_finish+0xbc/0x320 net/bridge/br_forward.c:67 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] __br_forward+0x560/0x9c0 net/bridge/br_forward.c:111 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:127 maybe_deliver net/bridge/br_forward.c:168 [inline] maybe_deliver net/bridge/br_forward.c:156 [inline] br_flood+0x3c8/0x530 net/bridge/br_forward.c:210 br_dev_xmit+0x9a4/0xd40 net/bridge/br_device.c:83 __netdev_start_xmit include/linux/netdevice.h:4033 [inline] netdev_start_xmit include/linux/netdevice.h:4042 [inline] xmit_one net/core/dev.c:3009 [inline] dev_hard_start_xmit+0x18c/0x8b0 net/core/dev.c:3025 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525 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_ns+0x360/0x7e0 net/ipv6/ndisc.c:625 addrconf_dad_work+0xa40/0xff0 net/ipv6/addrconf.c:3996 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 00 00 48 c7 c7 80 99 6e 86 4c 89 35 eb 3f be 07 41 be f4 ff ff ff e8 13 3c ee ff 48 c7 05 d5 3f 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 fb a4 7e rcu_sched kthread starved for 10546 jiffies! g791 c790 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 29776 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