======================================
| [  954.538459][    C0] 1 lock held by ksoftirqd/0/14:
| [ 954.538634][ C0] #0: ffffffffb218d440 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [  954.538945][    C0]
| [  954.538945][    C0] stack backtrace:
[  954.539166][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  954.539168][    C0] Call Trace:
[  954.539170][    C0]  <TASK>
[ 954.539172][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 954.539178][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 954.539183][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 954.539186][ C0] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 954.539192][ C0] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 954.539197][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 954.539201][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 954.539204][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 954.539207][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 954.539213][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 954.539216][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 954.539221][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 954.539225][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 954.539228][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 954.539233][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 954.539236][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 954.539239][ C0] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 954.539242][ C0] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 954.539246][ C0] ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745 ./include/trace/events/rcu.h:537) 
[ 954.539250][ C0] ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1)) 
[ 954.539253][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 954.539258][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 954.539261][ C0] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 954.539264][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 954.539267][ C0] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 954.539269][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 954.539272][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 954.539275][ C0] ? __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) 
[ 954.539281][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 954.539283][ C0] ? rcu_core (kernel/rcu/tree.c:2834) 
[ 954.539286][ C0] ? handle_softirqs (kernel/softirq.c:579) 
[ 954.539291][ C0] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 954.539294][ C0] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 954.539298][ C0] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 954.539302][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 954.539307][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 954.539311][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 954.539313][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 954.539318][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 954.539322][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 954.539325][ C0] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 954.539328][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 954.539332][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 954.539336][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 954.539340][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 954.539344][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 954.539347][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 954.539350][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 954.539353][ C0] kthread (kernel/kthread.c:464) 
[ 954.539357][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 954.539359][ C0] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 954.539362][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 954.539366][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 954.539369][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 954.539373][ C0] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 954.539376][ C0] ? __pfx_kthread (kernel/kthread.c:413) 


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