======================================
| [ 5095.112935][    C2] rcu_scheduler_active = 2, debug_locks = 1
| [ 5095.113323][    C2] no locks held by ip/21552.
| [ 5095.113587][    C2]
| [ 5095.113587][    C2] stack backtrace:
[ 5095.113920][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 5095.113922][    C2] Call Trace:
[ 5095.113925][    C2]  <TASK>
[ 5095.113927][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 5095.113940][ C2] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6866) 
[ 5095.113952][ C2] veth_xdp_rcv (drivers/net/veth.c:907 (discriminator 9)) 
[ 5095.113968][ C2] ? __pfx_veth_xdp_rcv (drivers/net/veth.c:899) 
[ 5095.113972][ C2] ? __pfx_native_flush_tlb_one_user (arch/x86/mm/tlb.c:1517) 
[ 5095.113987][ C2] ? __pfx_flush_tlb_func (arch/x86/mm/tlb.c:1033) 
[ 5095.113990][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4326) 
[ 5095.113999][ C2] veth_poll (drivers/net/veth.c:977) 
[ 5095.114003][ C2] ? __pfx_veth_poll (drivers/net/veth.c:965) 
[ 5095.114012][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 5095.114025][ C2] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 5095.114031][ C2] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 5095.114039][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 5095.114047][ C2] __napi_poll.constprop.0 (net/core/dev.c:7413) 
[ 5095.114053][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 5095.114059][ C2] net_rx_action (net/core/dev.c:7477 net/core/dev.c:7599) 
[ 5095.114071][ C2] ? __pfx_net_rx_action (net/core/dev.c:7561) 
[ 5095.114082][ C2] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 5095.114086][ C2] ? ktime_get (kernel/time/timekeeping.c:226 (discriminator 4) kernel/time/timekeeping.c:335 (discriminator 4) kernel/time/timekeeping.c:752 (discriminator 4)) 
[ 5095.114094][ C2] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 5095.114107][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 5095.114120][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 5095.114124][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 5095.114128][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049) 
[ 5095.114136][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 5095.114142][    C2] RIP: 0033:0x7f6cf4b8f7f4
[ 5095.114146][ C2] Code: 89 58 08 b8 01 00 00 00 e9 db 00 00 00 66 0f 1f 84 00 00 00 00 00 89 d1 48 89 f8 31 d2 48 f7 f1 48 8b 83 08 03 00 00 8b 04 90 <85> c0 0f 84 d2 fd ff ff 48 8b 93 10 03 00 00 4c 89 7c 24 38 48 89
All code
========
   0:	89 58 08             	mov    %ebx,0x8(%rax)
   3:	b8 01 00 00 00       	mov    $0x1,%eax
   8:	e9 db 00 00 00       	jmp    0xe8
   d:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  14:	00 00 
  16:	89 d1                	mov    %edx,%ecx
  18:	48 89 f8             	mov    %rdi,%rax
  1b:	31 d2                	xor    %edx,%edx
  1d:	48 f7 f1             	div    %rcx
  20:	48 8b 83 08 03 00 00 	mov    0x308(%rbx),%rax
  27:	8b 04 90             	mov    (%rax,%rdx,4),%eax
  2a:*	85 c0                	test   %eax,%eax		<-- trapping instruction
  2c:	0f 84 d2 fd ff ff    	je     0xfffffffffffffe04
  32:	48 8b 93 10 03 00 00 	mov    0x310(%rbx),%rdx
  39:	4c 89 7c 24 38       	mov    %r15,0x38(%rsp)
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	85 c0                	test   %eax,%eax
   2:	0f 84 d2 fd ff ff    	je     0xfffffffffffffdda
   8:	48 8b 93 10 03 00 00 	mov    0x310(%rbx),%rdx
   f:	4c 89 7c 24 38       	mov    %r15,0x38(%rsp)
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[ 5095.114149][    C2] RSP: 002b:00007fffcd863630 EFLAGS: 00000246
[ 5095.114153][    C2] RAX: 000000000000009b RBX: 00007f6cf4b78340 RCX: 0000000000000061
[ 5095.114155][    C2] RDX: 000000000000005d RSI: 0000000000000001 RDI: 0000000018c457e3
[ 5095.114157][    C2] RBP: 0000000000000004 R08: 0000000000000001 R09: 00007f6cf4bb84e0
[ 5095.114159][    C2] R10: 00007f6cf47e97b8 R11: 00007f6cf4ab8a30 R12: 00007f6cf4ac17d8


Finger prints:
lockdep_rcu_suspicious:veth_xdp_rcv:veth_poll:net_rx_action:handle_softirqs