======================================
| [   42.075414][    C1] rcu_scheduler_active = 2, debug_locks = 1
| [   42.075756][    C1] no locks held by ksoftirqd/1/22.
| [   42.075987][    C1]
| [   42.075987][    C1] stack backtrace:
[   42.076284][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.076286][    C1] Call Trace:
[   42.076288][    C1]  <TASK>
[ 42.076291][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 42.076301][ C1] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6866) 
[ 42.076311][ C1] veth_xdp_rcv (drivers/net/veth.c:907 (discriminator 9)) 
[ 42.076317][ C1] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 42.076324][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 42.076334][ C1] ? __pfx_veth_xdp_rcv (drivers/net/veth.c:899) 
[ 42.076338][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 42.076348][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:387 kernel/rcu/update.c:380) 
[ 42.076353][ C1] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 42.076360][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 42.076369][ C1] veth_poll (drivers/net/veth.c:977) 
[ 42.076373][ C1] ? __pfx_veth_poll (drivers/net/veth.c:965) 
[ 42.076376][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 42.076386][ C1] ? dl_scaled_delta_exec (kernel/sched/deadline.c:1481) 
[ 42.076401][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 42.076404][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 42.076415][ C1] __napi_poll.constprop.0 (net/core/dev.c:7383) 
[ 42.076420][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 42.076427][ C1] net_rx_action (net/core/dev.c:7447 net/core/dev.c:7569) 
[ 42.076437][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 42.076442][ C1] ? __pfx_net_rx_action (net/core/dev.c:7531) 
[ 42.076445][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 42.076449][ C1] ? trace_sched_exit_tp (./include/trace/events/sched.h:829 (discriminator 21)) 
[ 42.076456][ C1] ? __schedule (kernel/sched/core.c:6646) 
[ 42.076466][ C1] ? __pfx___schedule (kernel/sched/core.c:6646) 
[ 42.076479][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 42.076487][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 42.076493][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 42.076496][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 42.076501][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 42.076506][ C1] kthread (kernel/kthread.c:464) 
[ 42.076511][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.076513][ C1] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 42.076517][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 42.076523][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 42.076527][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.076531][ C1] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 42.076534][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


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