======================================
| [   42.599156][    C1] rcu_scheduler_active = 2, debug_locks = 1
| [   42.599544][    C1] no locks held by swapper/1/0.
| [   42.599808][    C1]
| [   42.599808][    C1] stack backtrace:
[   42.600139][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.600141][    C1] Call Trace:
[   42.600144][    C1]  <IRQ>
[ 42.600147][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 42.600159][ C1] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6866) 
[ 42.600170][ C1] veth_xdp_rcv (drivers/net/veth.c:907 (discriminator 9)) 
[ 42.600178][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 42.600187][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 42.600193][ C1] ? __pfx_veth_xdp_rcv (drivers/net/veth.c:899) 
[ 42.600199][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 42.600205][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 42.600213][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 42.600223][ C1] veth_poll (drivers/net/veth.c:977) 
[ 42.600228][ C1] ? __pfx_veth_poll (drivers/net/veth.c:965) 
[ 42.600236][ 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) 
[ 42.600242][ C1] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 42.600249][ C1] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 42.600255][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 42.600258][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 42.600266][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 42.600277][ C1] __napi_poll.constprop.0 (net/core/dev.c:7383) 
[ 42.600282][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 42.600289][ C1] net_rx_action (net/core/dev.c:7447 net/core/dev.c:7569) 
[ 42.600301][ C1] ? __pfx_net_rx_action (net/core/dev.c:7531) 
[ 42.600306][ C1] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 42.600320][ C1] ? _raw_spin_unlock_irq (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) 
[ 42.600328][ C1] ? _raw_spin_unlock_bh (kernel/locking/spinlock.c:209) 
[ 42.600333][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 42.600344][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 42.600359][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 42.600363][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 42.600366][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   42.600373][    C1]  </IRQ>
[   42.600374][    C1]  <TASK>
[ 42.600377][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 42.600382][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 42.600387][ C1] Code: 2f d4 00 c3 cc cc cc cc 0f 1f 00 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 e3 d0 26 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	2f                   	(bad)
   1:	d4                   	(bad)
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   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 e3 d0 26 00 	verw   0x26d0e3(%rip)        # 0x26d10b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   42.600390][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000246
[   42.600394][    C1] RAX: 00000000001c3ba3 RBX: 1ffff92000026fc1 RCX: ffffffff93825a59
[   42.600396][    C1] RDX: 0000000000000000 RSI: ffffffff9450b4da RDI: ffffffff93c539c0
[   42.600398][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9d667a
[   42.600399][    C1] R10: ffff88806ceb33d3 R11: 0000000000000000 R12: 0000000000000000
[   42.600401][    C1] R13: ffff888001b20040 R14: dffffc0000000000 R15: 0000000000000000
[ 42.600409][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 42.600417][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 42.600420][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 42.600423][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 42.600430][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 42.600436][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 42.600445][ C1] do_idle (kernel/sched/idle.c:325) 
[ 42.600451][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 42.600455][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 42.600459][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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