rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=a96/1/0x4000000000000004 softirq=82025/82029 fqs=5230 (t=10500 jiffies g=135821 q=5035) NMI backtrace for cpu 1 CPU: 1 PID: 9577 Comm: ps 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:__read_once_size include/linux/compiler.h:199 [inline] RIP: 0010:list_empty include/linux/list.h:268 [inline] RIP: 0010:hhf_dequeue+0x513/0xa20 net/sched/sch_hhf.c:429 Code: 08 48 c1 e8 03 42 80 3c 20 00 0f 85 12 04 00 00 49 89 1f e9 4b fb ff ff e8 4a 95 aa fb 48 8b 45 b8 4c 8b 75 c8 42 80 3c 20 00 <0f> 85 3a 04 00 00 49 8b 85 90 03 00 00 48 39 45 c8 0f 85 4b fb ff RSP: 0018:ffff8880ae909488 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11012349c72 RBX: ffff888091a4e2f8 RCX: ffffffff85c7e179 RDX: 0000000000000100 RSI: ffffffff85c7e006 RDI: ffff888091a4e300 RBP: ffff8880ae9094d8 R08: ffff88805e754380 R09: fffffbfff14e9755 R10: ffff88805e754d00 R11: ffff88805e754380 R12: dffffc0000000000 R13: ffff888091a4e000 R14: ffff888091a4e390 R15: ffff888091a4e390 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 neigh_resolve_output net/core/neighbour.c:1490 [inline] neigh_resolve_output+0x5a5/0x970 net/core/neighbour.c:1470 neigh_output include/net/neighbour.h:511 [inline] ip6_finish_output2+0x1034/0x2520 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:151 [inline] RIP: 0010:qlist_free_all+0x10c/0x150 mm/kasan/quarantine.c:167 Code: 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 4c 8b 78 18 e9 37 ff ff ff e8 f3 47 cb ff 48 83 3d eb 4a 46 07 00 74 39 48 89 df 57 9d <0f> 1f 44 00 00 4d 85 ed 75 96 49 c7 46 08 00 00 00 00 49 c7 06 00 RSP: 0018:ffff8880565c7c70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88805e754c10 RDI: 0000000000000286 RBP: ffff8880565c7ca0 R08: ffff88805e754380 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880a020c4c0 R14: ffff8880565c7cb0 R15: ffff8880aa402000 quarantine_reduce+0x169/0x1b0 mm/kasan/quarantine.c:260 __kasan_kmalloc.constprop.0+0xa3/0xe0 mm/kasan/common.c:474 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:501 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc mm/slab.c:3319 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3483 getname_flags fs/namei.c:138 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:128 getname+0x1a/0x20 fs/namei.c:209 do_sys_open+0x2c9/0x5d0 fs/open.c:1083 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1102 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f51824b0120 Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24 RSP: 002b:00007fff29b93ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f51824b0120 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f518297ed00 RBP: 0000000000001000 R08: 0000000000000000 R09: 00007f5182778a10 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f518297dd00 R13: 0000000001c571e0 R14: 0000000000000005 R15: 0000000000000000