======================================
| [   15.677341][    C1] 1 lock held by ksoftirqd/1/22:
| [ 15.677521][ C1] #0: ffffffff9e7793c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.677844][    C1]
| [   15.677844][    C1] stack backtrace:
[   15.678071][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.678074][    C1] Call Trace:
[   15.678078][    C1]  <TASK>
[ 15.678081][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.678088][ C1] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.678093][ C1] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.678101][ C1] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.678105][ C1] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.678108][ C1] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.678112][ C1] ? unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 15.678119][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 15.678123][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.678126][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 15.678130][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.678137][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.678140][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 15.678144][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.678147][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 15.678149][ C1] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 15.678153][ C1] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 15.678156][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.678162][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.678166][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 15.678171][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.678175][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 15.678179][ C1] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 15.678182][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.678186][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 15.678189][ C1] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 15.678198][ C1] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 15.678200][ C1] ? rcu_core (kernel/rcu/tree.c:2834) 
[ 15.678203][ C1] ? handle_softirqs (kernel/softirq.c:580) 
[ 15.678208][ C1] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 15.678213][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 15.678220][ C1] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 15.678224][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 15.678231][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 15.678235][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.678238][ C1] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 15.678243][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.678247][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.678251][ C1] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.678254][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.678260][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.678263][ C1] handle_softirqs (kernel/softirq.c:580) 
[ 15.678268][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 15.678272][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 15.678275][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 15.678280][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 15.678283][ C1] kthread (kernel/kthread.c:464) 
[ 15.678289][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 15.678292][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 15.678296][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.678300][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.678303][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 15.678307][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 15.678310][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock