======================================
| [   21.073253][    C0]  #3: ffffffff90591d40 (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))
| [   21.073417][    C0]  #4: ffffffff90591d40 (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))
| [   21.073584][    C0]
| [   21.073584][    C0] stack backtrace:
[   21.073704][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.073706][    C0] Call Trace:
[   21.073708][    C0]  <IRQ>
[   21.073709][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   21.073712][    C0]  print_circular_bug.cold (kernel/locking/lockdep.c:2043)
[   21.073715][    C0]  check_noncircular (kernel/locking/lockdep.c:2175)
[   21.073717][    C0]  check_prev_add (kernel/locking/lockdep.c:3165)
[   21.073720][    C0]  validate_chain (kernel/locking/lockdep.c:3284 kernel/locking/lockdep.c:3908)
[   21.073722][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   21.073724][    C0]  __lock_acquire (kernel/locking/lockdep.c:5237)
[   21.073727][    C0]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   21.073728][    C0]  ? ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[   21.073730][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073733][    C0]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   21.073735][    C0]  _raw_spin_lock_bh (./include/linux/spinlock_api_smp.h:150 (discriminator 1) kernel/locking/spinlock.c:182 (discriminator 1))
[   21.073736][    C0]  ? ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[   21.073737][    C0]  ___neigh_create (./include/linux/spinlock.h:348 net/core/neighbour.c:670)
[   21.073738][    C0]  ? sync_exp_reset_tree_hotplug (kernel/rcu/tree_exp.h:114)
[   21.073741][    C0]  ip_finish_output2 (./include/net/route.h:411 ./include/net/route.h:425 net/ipv4/ip_output.c:230)
[   21.073743][    C0]  ? ip_dst_mtu_maybe_forward (./include/linux/rcupdate.h:873 ./include/net/ip.h:504)
[   21.073744][    C0]  ? ip4_dst_hoplimit (./include/net/dst.h:582 (discriminator 4) ./include/net/dst.h:587 (discriminator 4) ./include/net/route.h:395 (discriminator 4))
[   21.073746][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073748][    C0]  ip_output (./include/linux/netfilter.h:314 net/ipv4/ip_output.c:437)
[   21.073750][    C0]  ? ip_finish_output (./include/linux/cgroup.h:868)
[   21.073752][    C0]  ? __ip_make_skb (net/ipv4/ip_output.c:1386 net/ipv4/ip_output.c:1497)
[   21.073754][    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))
[   21.073756][    C0]  __icmp_send (net/ipv4/icmp.c:1015)
[   21.073759][    C0]  ? icmpv4_global_allow (net/ipv4/icmp.c:303 (discriminator 42))
[   21.073761][    C0]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[   21.073762][    C0]  ? rcu_watching_snap_stopped_since (kernel/rcu/tree.c:326)
[   21.073764][    C0]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   21.073768][    C0]  ? sched_balance_find_src_group (kernel/sched/fair.c:12797)
[   21.073772][    C0]  ipv4_send_dest_unreach (net/ipv4/route.c:1282)
[   21.073774][    C0]  ? ip_do_redirect (net/ipv4/route.c:873)
[   21.073775][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   21.073778][    C0]  ipv4_link_failure (net/ipv4/route.c:1289)
[   21.073779][    C0]  arp_error_report (./include/net/dst.h:438 net/ipv4/arp.c:299)
[   21.073781][    C0]  neigh_invalidate (net/core/neighbour.c:1057)
[   21.073782][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[   21.073784][    C0]  neigh_timer_handler (net/core/neighbour.c:1149)
[   21.073786][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[   21.073787][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073788][    C0]  call_timer_fn (kernel/time/timer.c:1748)
[   21.073789][    C0]  ? detach_if_pending (./include/linux/list.h:1143)
[   21.073791][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   21.073792][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   21.073794][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073796][    C0]  __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2374)
[   21.073797][    C0]  ? neigh_periodic_work (net/core/neighbour.c:973 (discriminator 3))
[   21.073799][    C0]  ? __bpf_trace_itimer_expire (./include/trace/events/timer.h:407)
[   21.073800][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   21.073803][    C0]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   21.073805][    C0]  run_timer_softirq (kernel/time/timer.c:2386 kernel/time/timer.c:2395 kernel/time/timer.c:2403)
[   21.073806][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[   21.073809][    C0]  ? __run_timers (./include/trace/events/timer.h:138 (discriminator 19))
[   21.073810][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   21.073813][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073815][    C0]  handle_softirqs (kernel/softirq.c:622)
[   21.073817][    C0]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   21.073819][    C0]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   21.073821][    C0]  irq_exit_rcu (kernel/softirq.c:752)
[   21.073823][    C0]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[   21.073824][    C0]  </IRQ>
[   21.073825][    C0]  <TASK>
[   21.073826][    C0]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   21.073828][    C0]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[   21.073829][    C0] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:63)
[   21.073831][    C0] Code: 48 8b 3d 44 61 6e 02 e8 1f 00 00 00 48 2b 05 08 22 a7 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d a3 dd 19 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 61 6e 02 	mov    0x26e6144(%rip),%rdi        # 0x26e614b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 08 22 a7 00 	sub    0xa72208(%rip),%rax        # 0xa7221b
  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 dd 19 00 	verw   0x19dda3(%rip)        # 0x19ddcb
  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
[   21.073833][    C0] RSP: 0018:ffffffff90207e18 EFLAGS: 00000292
[   21.073835][    C0] RAX: 000000000013e1a5 RBX: ffffffff90230600 RCX: ffffffff8c8f7f27
[   21.073836][    C0] RDX: ffffffff90230600 RSI: ffffffff8fac4933 RDI: ffffffff8f47d760
[   21.073837][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   21.073838][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: 1ffffffff2040fc6
[   21.073838][    C0] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000014770
[   21.073840][    C0]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   21.073842][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   21.073844][    C0]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:768)
[   21.073845][    C0]  default_idle_call (kernel/sched/idle.c:122)
[   21.073846][    C0]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   21.073848][    C0]  ? arch_cpu_idle_exit+0x40/0x40
[   21.073850][    C0]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   21.073853][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   21.073854][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   21.073856][    C0]  do_idle (kernel/sched/idle.c:355)
[   21.073858][    C0]  cpu_startup_entry (kernel/sched/idle.c:454)
[   21.073859][    C0]  rest_init (init/main.c:717)
[   21.073861][    C0]  start_kernel (init/main.c:1175)
[   21.073863][    C0]  x86_64_start_reservations (arch/x86/kernel/head64.c:310)
[   21.073864][    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