======================================
| [   41.938648][    C3] rcu_scheduler_active = 2, debug_locks = 1
| [   41.939039][    C3] no locks held by ksoftirqd/3/32.
| [   41.939314][    C3]
| [   41.939314][    C3] stack backtrace:
[   41.939658][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   41.939659][    C3] Call Trace:
[   41.939662][    C3]  <TASK>
[ 41.939664][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 41.939675][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6866) 
[ 41.939685][ C3] veth_xdp_rcv (drivers/net/veth.c:907 (discriminator 9)) 
[ 41.939695][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 41.939703][ C3] ? __pfx_veth_xdp_rcv (drivers/net/veth.c:899) 
[ 41.939712][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 41.939726][ C3] veth_poll (drivers/net/veth.c:977) 
[ 41.939731][ C3] ? __pfx_veth_poll (drivers/net/veth.c:965) 
[ 41.939739][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 41.939749][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 41.939756][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 41.939761][ C3] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 41.939772][ C3] __napi_poll.constprop.0 (net/core/dev.c:7383) 
[ 41.939777][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 41.939784][ C3] net_rx_action (net/core/dev.c:7447 net/core/dev.c:7569) 
[ 41.939794][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 41.939800][ C3] ? __pfx_net_rx_action (net/core/dev.c:7531) 
[ 41.939804][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 41.939808][ C3] ? trace_sched_exit_tp (./include/trace/events/sched.h:829 (discriminator 21)) 
[ 41.939814][ C3] ? __schedule (kernel/sched/core.c:6646) 
[ 41.939824][ C3] ? __pfx___schedule (kernel/sched/core.c:6646) 
[ 41.939836][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 41.939844][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 41.939850][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 41.939853][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 41.939858][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 41.939863][ C3] kthread (kernel/kthread.c:464) 
[ 41.939868][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.939870][ C3] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 41.939875][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 41.939880][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 41.939884][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.939889][ C3] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 41.939892][ C3] ? __pfx_kthread (kernel/kthread.c:413) 


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