======================================
| [   25.732542][    C1] 1 lock held by swapper/1/0:
| [ 25.732722][ C1] #0: ffffc900001e0d60 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
| [   25.733062][    C1]
| [   25.733062][    C1] stack backtrace:
[   25.733292][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.733296][    C1] Call Trace:
[   25.733299][    C1]  <IRQ>
[ 25.733306][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.733318][ C1] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[ 25.733330][ C1] __icmp_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv4/icmp.c:616) 
[ 25.733341][ C1] ? debug_object_activate (lib/debugobjects.c:837) 
[ 25.733351][ C1] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 25.733360][ C1] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 25.733366][ C1] ? debug_object_activate (lib/debugobjects.c:837) 
[ 25.733374][ C1] ? __pfx_debug_object_activate (lib/debugobjects.c:805) 
[ 25.733383][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.733388][ C1] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 25.733401][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[ 25.733405][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:230) 
[ 25.733408][ C1] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 25.733417][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 25.733426][ C1] ipv4_send_dest_unreach (net/ipv4/route.c:1241) 
[ 25.733433][ C1] ? neigh_invalidate (net/core/neighbour.c:1008) 
[ 25.733439][ C1] ? __pfx_ipv4_send_dest_unreach (net/ipv4/route.c:1215) 
[ 25.733451][ C1] ipv4_link_failure (./include/linux/skbuff.h:1152 ./include/net/route.h:88 net/ipv4/route.c:1250) 
[ 25.733456][ C1] arp_error_report (./include/net/dst.h:429 net/ipv4/arp.c:296) 
[ 25.733464][ C1] neigh_invalidate (net/core/neighbour.c:1008) 
[ 25.733473][ C1] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2)) 
[ 25.733483][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 25.733486][ C1] call_timer_fn (kernel/time/timer.c:1789) 
[ 25.733489][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 25.733492][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 25.733496][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) 
[ 25.733499][ C1] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 25.733516][ C1] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) 
[ 25.733520][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 25.733530][ C1] ? __pfx___run_timers (kernel/time/timer.c:2385) 
[ 25.733533][ C1] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 25.733543][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 25.733551][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 25.733558][ C1] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 25.733561][ C1] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 25.733570][ C1] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 25.733575][ C1] handle_softirqs (kernel/softirq.c:561) 
[ 25.733590][ C1] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[ 25.733593][ C1] irq_exit_rcu (kernel/softirq.c:680) 
[ 25.733596][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   25.733602][    C1]  </IRQ>
[   25.733603][    C1]  <TASK>
[ 25.733605][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 25.733611][ C1] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:744) 
[ 25.733616][ C1] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 cc 14 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 23 cc 14 00 	verw   0x14cc23(%rip)        # 0x14cc4b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   25.733620][    C1] RSP: 0018:ffffc90000157df8 EFLAGS: 00000246
[   25.733624][    C1] RAX: 00000000000d992b RBX: 1ffff9200002afc1 RCX: ffffffffabf14b15
[   25.733626][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa9769634
[   25.733628][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c1703a
[   25.733630][    C1] R10: ffff8880360b81d3 R11: ffff888001b2c5c0 R12: 0000000000000000
[   25.733632][    C1] R13: ffff888001b2c5c0 R14: dffffc0000000000 R15: 0000000000000000
[ 25.733641][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) 
[ 25.733646][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 25.733655][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 25.733658][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 25.733662][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 25.733669][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 25.733679][ C1] do_idle (kernel/sched/idle.c:325) 
[ 25.733685][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 25.733690][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 25.733694][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 25.733704][ C1] common_startup_64 (arch/x86/kernel/head_64.S:421) 
| [   30.404671][    C0] 1 lock held by swapper/0/0:
| [ 30.404897][ C0] #0: ffffc90000007d60 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
| [   30.405318][    C0]
| [   30.405318][    C0] stack backtrace:
[   30.405597][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   30.405601][    C0] Call Trace:
[   30.405603][    C0]  <IRQ>
[ 30.405606][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.405616][ C0] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[ 30.405627][ C0] icmp6_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv6/icmp.c:476) 
[ 30.405638][ C0] ? update_sd_lb_stats.constprop.0 (kernel/sched/fair.c:11009) 
[ 30.405652][ C0] ? __pfx_icmp6_send (net/ipv6/icmp.c:452) 
[ 30.405661][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[ 30.405666][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:230) 
[ 30.405669][ C0] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 30.405679][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 30.405685][ C0] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 30.405691][ C0] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 30.405694][ C0] ? neigh_invalidate (net/core/neighbour.c:1008) 
[ 30.405700][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 30.405704][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[ 30.405715][ C0] ip6_link_failure (./include/linux/skbuff.h:1152 net/ipv6/route.c:2801) 
[ 30.405723][ C0] ndisc_error_report (./include/net/dst.h:429 net/ipv6/ndisc.c:731) 
[ 30.405730][ C0] neigh_invalidate (net/core/neighbour.c:1008) 
[ 30.405739][ C0] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2)) 
[ 30.405749][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 30.405752][ C0] call_timer_fn (kernel/time/timer.c:1789) 
[ 30.405755][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 30.405758][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 30.405762][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) 
[ 30.405764][ C0] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 30.405782][ C0] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) 
[ 30.405785][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 30.405795][ C0] ? __pfx___run_timers (kernel/time/timer.c:2385) 
[ 30.405798][ C0] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 30.405809][ C0] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 30.405815][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 30.405819][ C0] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 30.405822][ C0] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 30.405831][ C0] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 30.405836][ C0] handle_softirqs (kernel/softirq.c:561) 
[ 30.405850][ C0] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[ 30.405853][ C0] irq_exit_rcu (kernel/softirq.c:680) 
[ 30.405856][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   30.405861][    C0]  </IRQ>
[   30.405862][    C0]  <TASK>
[ 30.405865][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 30.405870][ C0] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:744) 
[ 30.405874][ C0] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 cc 14 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 23 cc 14 00 	verw   0x14cc23(%rip)        # 0x14cc4b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   30.405877][    C0] RSP: 0018:ffffffffacc07e00 EFLAGS: 00000242
[   30.405880][    C0] RAX: 000000000009e297 RBX: 1ffffffff5980fc2 RCX: ffffffffabf14b15
[   30.405882][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa9769634
[   30.405884][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0703a
[   30.405885][    C0] R10: ffff8880360381d3 R11: ffff88803602d670 R12: 0000000000000000
[   30.405887][    C0] R13: ffffffffacc1cfc0 R14: dffffc0000000000 R15: 0000000000014770
[ 30.405896][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) 
[ 30.405900][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 30.405909][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 30.405912][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 30.405917][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 30.405924][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 30.405935][ C0] do_idle (kernel/sched/idle.c:325) 
[ 30.405941][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 30.405946][ C0] rest_init (./include/linux/rcupdate.h:850 init/main.c:714) 
[ 30.405952][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 30.405960][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:503) 
[ 30.405965][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:445 (discriminator 17)) 


Finger prints:
lockdep_rcu_suspicious:__icmp_send:ipv4_send_dest_unreach:ipv4_link_failure:arp_error_report
lockdep_rcu_suspicious:icmp6_send:ip6_link_failure:ndisc_error_report:neigh_invalidate