rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10499 ticks this GP) idle=3e6/1/0x4000000000000004 softirq=10694/10698 fqs=8 (t=10501 jiffies g=8565 q=240) rcu: rcu_preempt kthread starved for 10486 jiffies! g8565 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29112 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xd9/0x260 kernel/sched/core.c:3947 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline] rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 8889 Comm: modprobe Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1131 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:hhf_dequeue+0x501/0xa20 net/sched/sch_hhf.c:428 Code: 03 42 80 3c 20 00 0f 85 35 04 00 00 4c 89 f8 4c 89 7b 08 48 c1 e8 03 42 80 3c 20 00 0f 85 12 04 00 00 49 89 1f e9 4b fb ff ff ea 91 aa fb 48 8b 45 b8 4c 8b 75 c8 42 80 3c 20 00 0f 85 3a 04 RSP: 0018:ffff8880ae908e78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a2099100 RBX: ffff8880a2099078 RCX: ffffffff85c7e4d9 RDX: 0000000000000100 RSI: ffff8880a2099100 RDI: ffff8880a2099080 RBP: ffff8880ae908ec8 R08: ffff888093efc0c0 R09: fffffbfff14e9755 R10: ffff888093efcab8 R11: ffff888093efc0c0 R12: dffffc0000000000 R13: ffff8880a2098d80 R14: ffff8880a2099100 R15: ffff8880a2099110 dequeue_skb net/sched/sch_generic.c:258 [inline] qdisc_restart net/sched/sch_generic.c:361 [inline] __qdisc_run+0x1e7/0x19d0 net/sched/sch_generic.c:379 __dev_xmit_skb net/core/dev.c:3533 [inline] __dev_queue_xmit+0x16f1/0x3650 net/core/dev.c:3838 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902 br_dev_queue_push_xmit+0x3f3/0x5c0 net/bridge/br_forward.c:52 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] br_forward_finish+0xfa/0x400 net/bridge/br_forward.c:65 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] __br_forward+0x641/0xb00 net/bridge/br_forward.c:109 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:125 maybe_deliver+0x2c7/0x390 net/bridge/br_forward.c:181 br_flood+0x13a/0x3d0 net/bridge/br_forward.c:223 br_dev_xmit+0x98c/0x15a0 net/bridge/br_device.c:100 __netdev_start_xmit include/linux/netdevice.h:4419 [inline] netdev_start_xmit include/linux/netdevice.h:4433 [inline] xmit_one net/core/dev.c:3280 [inline] dev_hard_start_xmit+0x1a3/0x9c0 net/core/dev.c:3296 __dev_queue_xmit+0x2b15/0x3650 net/core/dev.c:3869 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902 neigh_hh_output include/net/neighbour.h:500 [inline] neigh_output include/net/neighbour.h:509 [inline] ip6_finish_output2+0xf58/0x2520 net/ipv6/ip6_output.c:116 __ip6_finish_output+0x444/0xa50 net/ipv6/ip6_output.c:142 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:175 dst_output include/net/dst.h:436 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0xf29/0x1450 net/ipv6/ndisc.c:505 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:699 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3879 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x697/0x17a0 kernel/time/timer.c:1698 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:avc_start_pgoff mm/interval_tree.c:63 [inline] RIP: 0010:anon_vma_interval_tree_insert+0x57/0x510 mm/interval_tree.c:79 Code: 80 3c 02 00 0f 85 31 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 23 49 8d bc 24 98 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 01 04 00 00 48 8d 7b 40 4d 8b b4 24 98 00 00 00 48 b8 00 00 RSP: 0018:ffff888065c5fc50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88808d5737e0 RCX: ffffffff819f3163 RDX: 1ffff1101248df7e RSI: ffffffff819b77dc RDI: ffff88809246fbf0 RBP: ffff888065c5fc90 R08: ffff888093efc0c0 R09: ffffed101223454a R10: ffffed1012234549 R11: ffff8880911a2a4f R12: ffff88809246fb58 R13: ffff8880911a2ad0 R14: ffff88808a9d4170 R15: ffff8880a12f1420 anon_vma_interval_tree_post_update_vma mm/mmap.c:522 [inline] __vma_adjust+0x61a/0x1800 mm/mmap.c:916 vma_adjust include/linux/mm.h:2299 [inline] __split_vma+0x47a/0x560 mm/mmap.c:2689 __do_munmap+0xcc0/0xf10 mm/mmap.c:2788 __vm_munmap+0xff/0x1a0 mm/mmap.c:2853 __do_sys_munmap mm/mmap.c:2878 [inline] __se_sys_munmap mm/mmap.c:2875 [inline] __x64_sys_munmap+0x67/0x80 mm/mmap.c:2875 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8f8ddbcd37 Code: f0 ff ff 73 01 c3 48 8b 0d fe c0 2a 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d1 c0 2a 00 31 d2 48 29 c2 64 RSP: 002b:00007ffd8471c218 EFLAGS: 00000206 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 000055e57fb0c250 RCX: 00007f8f8ddbcd37 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f8f8e4a1000 RBP: 0000000000000000 R08: 00007f8f8e49c700 R09: 00007ffd8471c378 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000055e57fb0c110 R14: 000055e57fb0c200 R15: 00007ffd8471c4a0