======================================
| [   13.048198][    C1] 1 lock held by ksoftirqd/1/22:
| [ 13.048373][ C1] #0: ffffffff96f793c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   13.048689][    C1]
| [   13.048689][    C1] stack backtrace:
[   13.048914][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.048916][    C1] Call Trace:
[   13.048918][    C1]  <TASK>
[ 13.048920][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 13.048926][ C1] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 13.048931][ C1] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 13.048937][ C1] mark_lock (kernel/locking/lockdep.c:4756) 
[ 13.048940][ C1] mark_usage (kernel/locking/lockdep.c:4645) 
[ 13.048943][ C1] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 13.048945][ C1] ? unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 13.048951][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 13.048955][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 13.048958][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 13.048961][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 13.048964][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 13.048966][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 13.048969][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 13.048972][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 13.048974][ C1] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 13.048977][ C1] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 13.048979][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 13.048983][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 13.048989][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 13.048994][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 13.048997][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 13.049002][ C1] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 13.049005][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 13.049008][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 13.049011][ 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) 
[ 13.049016][ C1] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 13.049019][ C1] ? rcu_core (kernel/rcu/tree.c:2834) 
[ 13.049021][ C1] ? handle_softirqs (kernel/softirq.c:580) 
[ 13.049025][ C1] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 13.049030][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 13.049035][ C1] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 13.049040][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 13.049044][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 13.049048][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 13.049051][ C1] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 13.049056][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 13.049061][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 13.049063][ C1] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 13.049066][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 13.049072][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 13.049075][ C1] handle_softirqs (kernel/softirq.c:580) 
[ 13.049079][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 13.049082][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 13.049084][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 13.049089][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 13.049093][ C1] kthread (kernel/kthread.c:464) 
[ 13.049098][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 13.049100][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 13.049102][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 13.049105][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 13.049108][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 13.049112][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 13.049114][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


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