INFO: rcu detected stall in neigh_timer

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in neigh_timer_handler (6) netfilter	1	1228d	1228d	0/26	auto-closed as invalid on 2021/03/09 03:20
upstream	INFO: rcu detected stall in neigh_timer_handler net	1	1973d	1973d	0/26	auto-closed as invalid on 2019/05/23 06:47
upstream	INFO: rcu detected stall in neigh_timer_handler (2) net	2	1683d	1684d	13/26	fixed on 2019/10/09 10:54
upstream	INFO: rcu detected stall in neigh_timer_handler (4) net	1	1598d	1598d	0/26	closed as invalid on 2019/12/04 14:04
upstream	INFO: rcu detected stall in neigh_timer_handler (3) net	2	1603d	1603d	0/26	closed as invalid on 2019/11/29 14:24
upstream	INFO: rcu detected stall in neigh_timer_handler (7) net	1	1103d	1103d	0/26	auto-closed as invalid on 2021/07/11 19:14
linux-4.14	INFO: rcu detected stall in neigh_timer_handler	5	1448d	1567d	0/1	auto-closed as invalid on 2020/08/30 16:21

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=e56/1/0x4000000000000000 softirq=25762/25764 fqs=4762 (t=10502 jiffies g=38777 q=1688) NMI backtrace for cpu 1 CPU: 1 PID: 17813 Comm: syz-executor.1 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline] check_cpu_stall kernel/rcu/tree_stall.h:625 [inline] rcu_pending kernel/rcu/tree.c:3637 [inline] rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519 update_process_times+0x25/0xa0 kernel/time/timer.c:1710 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__list_add_valid+0x74/0xa0 lib/list_debug.c:35 Code: 00 75 3a 48 8b 16 4c 39 e2 0f 85 5e 01 00 00 48 39 f5 0f 84 3e 01 00 00 4c 39 e5 0f 84 35 01 00 00 48 83 c4 08 b8 01 00 00 00 <5d> 41 5c c3 48 89 34 24 e8 9f 4a 15 fe 48 8b 34 24 eb a1 48 89 f7 RSP: 0018:ffffc90000da8300 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffff88804644c9e8 RCX: ffffffff866a7350 RDX: ffff88804644c9e8 RSI: ffff88804644c9e8 RDI: ffff88804644c9f0 RBP: ffff888046436db0 R08: 0000000000000000 R09: ffffffff8ab2684f R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804644c9e8 R13: ffff888046436db0 R14: dffffc0000000000 R15: ffff8880464331a0 __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] list_move_tail include/linux/list.h:228 [inline] cake_dequeue+0x12b1/0x3c10 net/sched/sch_cake.c:2096 dequeue_skb net/sched/sch_generic.c:263 [inline] qdisc_restart net/sched/sch_generic.c:366 [inline] __qdisc_run+0x1ac/0x1620 net/sched/sch_generic.c:384 __dev_xmit_skb net/core/dev.c:3800 [inline] __dev_queue_xmit+0x1995/0x2d60 net/core/dev.c:4105 neigh_hh_output include/net/neighbour.h:498 [inline] neigh_output include/net/neighbour.h:507 [inline] ip_finish_output2+0x1523/0x21f0 net/ipv4/ip_output.c:228 __ip_finish_output net/ipv4/ip_output.c:306 [inline] __ip_finish_output+0x779/0xcb0 net/ipv4/ip_output.c:288 ip_finish_output+0x34/0x1f0 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:443 [inline] ip_local_out net/ipv4/ip_output.c:125 [inline] ip_send_skb net/ipv4/ip_output.c:1566 [inline] ip_push_pending_frames+0x125/0x2b0 net/ipv4/ip_output.c:1586 icmp_push_reply+0x342/0x490 net/ipv4/icmp.c:390 __icmp_send+0xb67/0x13e0 net/ipv4/icmp.c:740 ipv4_send_dest_unreach net/ipv4/route.c:1227 [inline] ipv4_link_failure+0x5f0/0x9f0 net/ipv4/route.c:1234 dst_link_failure include/net/dst.h:426 [inline] arp_error_report+0xc7/0x1c0 net/ipv4/arp.c:293 neigh_invalidate+0x20d/0x560 net/core/neighbour.c:993 neigh_timer_handler+0xda0/0x1150 net/core/neighbour.c:1080 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 </IRQ> __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:284 Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 cc fe ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 ae fe ff ff 0f 1f 40 00 66 2e 0f 1f RSP: 0018:ffffc9001573f9e0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: ffffc9001573fa98 RCX: ffffffff81a3bda5 RDX: 1ffff92002ae7f5b RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffea0001ec1940 R08: 0000000000000001 R09: ffffea0001ec1947 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000200 R13: ffffc9001573fad8 R14: 0000000000000200 R15: 000000000000010f __do_fault+0x165/0x4d0 mm/memory.c:3476 do_read_fault mm/memory.c:3856 [inline] do_fault mm/memory.c:3984 [inline] handle_pte_fault mm/memory.c:4224 [inline] __handle_mm_fault mm/memory.c:4359 [inline] handle_mm_fault+0x3477/0x4590 mm/memory.c:4457 faultin_page mm/gup.c:887 [inline] __get_user_pages+0x724/0x16b0 mm/gup.c:1105 populate_vma_page_range+0x24d/0x330 mm/gup.c:1435 __mm_populate+0x1ea/0x350 mm/gup.c:1483 mm_populate include/linux/mm.h:2559 [inline] vm_mmap_pgoff+0x1de/0x200 mm/util.c:511 ksys_mmap_pgoff+0xde/0x560 mm/mmap.c:1596 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8daf0b9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000020bc0 RCX: 000000000045d5b9 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000118d038 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 000000000118cfec R13: 00007fff1416a50f R14: 00007f8daf0ba9c0 R15: 000000000118cfec