======================================
| [  140.657441][    C0]  #3: ffffffffb01a1cc0 (rcu_read_lock){....}-{1:3}, at: ip_output (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:840 (discriminator 2) net/ipv4/ip_output.c:432 (discriminator 2))
| [  140.657622][    C0]  #4: ffffffffb01a1cc0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2 (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:840 (discriminator 2) net/ipv4/ip_output.c:229 (discriminator 2))
| [  140.657786][    C0]
| [  140.657786][    C0] stack backtrace:
[  140.657908][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  140.657910][    C0] Call Trace:
[  140.657912][    C0]  <IRQ>
[  140.657913][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  140.657916][    C0]  print_circular_bug.cold (kernel/locking/lockdep.c:2043)
[  140.657919][    C0]  check_noncircular (kernel/locking/lockdep.c:2175)
[  140.657922][    C0]  check_prev_add (kernel/locking/lockdep.c:3165)
[  140.657924][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  140.657926][    C0]  validate_chain (kernel/locking/lockdep.c:3284 kernel/locking/lockdep.c:3908)
[  140.657928][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  140.657930][    C0]  __lock_acquire (kernel/locking/lockdep.c:5237)
[  140.657932][    C0]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  140.657934][    C0]  ? ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[  140.657936][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.657938][    C0]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  140.657940][    C0]  _raw_spin_lock_bh (./include/linux/spinlock_api_smp.h:150 (discriminator 1) kernel/locking/spinlock.c:182 (discriminator 1))
[  140.657942][    C0]  ? ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[  140.657943][    C0]  ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[  140.657944][    C0]  ? __rcu_read_lock (kernel/rcu/tree_plugin.h:413)
[  140.657946][    C0]  ip_finish_output2 (./include/net/route.h:411 ./include/net/route.h:425 net/ipv4/ip_output.c:230)
[  140.657948][    C0]  ? ip_dst_mtu_maybe_forward (./include/linux/rcupdate.h:873 ./include/net/ip.h:504)
[  140.657950][    C0]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:587 (discriminator 41))
[  140.657951][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.657953][    C0]  ip_output (./include/linux/netfilter.h:314 net/ipv4/ip_output.c:437)
[  140.657955][    C0]  ? ip_finish_output (./include/linux/cgroup.h:868)
[  140.657957][    C0]  ? __ip_make_skb (net/ipv4/ip_output.c:1386 net/ipv4/ip_output.c:1497)
[  140.657960][    C0]  ip_push_pending_frames (./include/net/dst.h:470 (discriminator 4) net/ipv4/ip_output.c:131 (discriminator 4) net/ipv4/ip_output.c:1506 (discriminator 4) net/ipv4/ip_output.c:1526 (discriminator 4))
[  140.657961][    C0]  __icmp_send (net/ipv4/icmp.c:1015)
[  140.657964][    C0]  ? unwind_next_frame (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:871 (discriminator 2) ./include/linux/rcupdate.h:1183 (discriminator 2) arch/x86/kernel/unwind_orc.c:495 (discriminator 2))
[  140.657967][    C0]  ? icmpv4_global_allow (net/ipv4/icmp.c:303 (discriminator 42))
[  140.657968][    C0]  ? trace_pelt_cfs_tp (./include/trace/events/sched.h:833 (discriminator 22))
[  140.657970][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.657971][    C0]  ? __update_load_avg_cfs_rq (kernel/sched/pelt.c:329)
[  140.657974][    C0]  ? update_cfs_rq_load_avg (kernel/sched/fair.c:5477)
[  140.657977][    C0]  ? update_load_avg (kernel/sched/fair.c:5680)
[  140.657979][    C0]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  140.657982][    C0]  ? __trace_set_current_state (./include/linux/srcutree.h:292 (discriminator 3))
[  140.657984][    C0]  ? enqueue_task_fair (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/cpumask.h:651 ./include/linux/cpumask.h:1253 kernel/sched/sched.h:3134 kernel/sched/sched.h:3139 kernel/sched/fair.c:7691 kernel/sched/fair.c:7915)
[  140.657986][    C0]  ipv4_send_dest_unreach (net/ipv4/route.c:1282)
[  140.657988][    C0]  ? ip_do_redirect (net/ipv4/route.c:864)
[  140.657990][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  140.657992][    C0]  ipv4_link_failure (net/ipv4/route.c:1289)
[  140.657994][    C0]  arp_error_report (./include/net/dst.h:438 net/ipv4/arp.c:299)
[  140.657995][    C0]  neigh_invalidate (net/core/neighbour.c:1057)
[  140.657998][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[  140.657999][    C0]  neigh_timer_handler (net/core/neighbour.c:1149)
[  140.658001][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[  140.658002][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.658003][    C0]  call_timer_fn (kernel/time/timer.c:1748)
[  140.658005][    C0]  ? detach_if_pending (./include/linux/list.h:1143)
[  140.658007][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  140.658009][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  140.658010][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.658012][    C0]  __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2374)
[  140.658014][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[  140.658016][    C0]  ? __bpf_trace_itimer_expire (./include/trace/events/timer.h:407)
[  140.658018][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  140.658020][    C0]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[  140.658023][    C0]  run_timer_softirq (kernel/time/timer.c:2386 kernel/time/timer.c:2395 kernel/time/timer.c:2403)
[  140.658025][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[  140.658028][    C0]  ? __run_timers (./include/trace/events/timer.h:138 (discriminator 19))
[  140.658030][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  140.658032][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.658034][    C0]  handle_softirqs (kernel/softirq.c:622)
[  140.658036][    C0]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  140.658038][    C0]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  140.658039][    C0]  irq_exit_rcu (kernel/softirq.c:752)
[  140.658041][    C0]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[  140.658043][    C0]  </IRQ>
[  140.658043][    C0]  <TASK>
[  140.658044][    C0]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  140.658046][    C0]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[  140.658048][    C0] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:63)
[  140.658050][    C0] Code: 48 8b 3d 44 21 f6 01 e8 1f 00 00 00 48 2b 05 08 42 91 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d a3 4d 0d 00 fb f4 <c3> 0f 1f 40 d6 48 83 ec 20 8b 17 49 89 f8 83 e2 fe 41 89 d2 0f 01
All code
========
   0:	48 8b 3d 44 21 f6 01 	mov    0x1f62144(%rip),%rdi        # 0x1f6214b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 08 42 91 00 	sub    0x914208(%rip),%rax        # 0x91421b
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d a3 4d 0d 00 	verw   0xd4da3(%rip)        # 0xd4dcb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  2f:	48 83 ec 20          	sub    $0x20,%rsp
  33:	8b 17                	mov    (%rdi),%edx
  35:	49 89 f8             	mov    %rdi,%r8
  38:	83 e2 fe             	and    $0xfffffffe,%edx
  3b:	41 89 d2             	mov    %edx,%r10d
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	0f 1f 40 d6          	nopl   -0x2a(%rax)
   5:	48 83 ec 20          	sub    $0x20,%rsp
   9:	8b 17                	mov    (%rdi),%edx
   b:	49 89 f8             	mov    %rdi,%r8
   e:	83 e2 fe             	and    $0xfffffffe,%edx
  11:	41 89 d2             	mov    %edx,%r10d
  14:	0f                   	.byte 0xf
  15:	01                   	.byte 0x1
[  140.658052][    C0] RSP: 0018:ffffffffafe07e18 EFLAGS: 00000292
[  140.658054][    C0] RAX: 00000000008a0327 RBX: ffffffffafe40600 RCX: ffffffffacee6de7
[  140.658055][    C0] RDX: ffffffffafe40600 RSI: ffffffffafc358e3 RDI: ffffffffaf67a8e0
[  140.658056][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  140.658057][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: 1ffffffff5fc0fc6
[  140.658058][    C0] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000014770
[  140.658059][    C0]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  140.658062][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  140.658063][    C0]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:768)
[  140.658065][    C0]  default_idle_call (kernel/sched/idle.c:122)
[  140.658067][    C0]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  140.658068][    C0]  ? arch_cpu_idle_exit+0x40/0x40
[  140.658070][    C0]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  140.658073][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  140.658074][    C0]  do_idle (kernel/sched/idle.c:355)
[  140.658076][    C0]  cpu_startup_entry (kernel/sched/idle.c:454)
[  140.658078][    C0]  rest_init (init/main.c:717)
[  140.658080][    C0]  start_kernel (init/main.c:1175)
[  140.658081][    C0]  x86_64_start_reservations (arch/x86/kernel/head64.c:310)
[  140.658083][    C0]  x86_64_start_kernel (arch/x86/kernel/head64.c:291)


Finger prints:
check_prev_add:validate_chain:__lock_acquire:_raw_spin_lock_bh:___neigh_create