======================================
| [   29.732667][    C0] 1 lock held by ksoftirqd/0/14:
| [ 29.732971][ C0] #0: ffffffff9d1793c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   29.733614][    C0]
| [   29.733614][    C0] stack backtrace:
[   29.733993][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   29.733996][    C0] Call Trace:
[   29.733999][    C0]  <TASK>
[ 29.734003][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.734012][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 29.734022][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 29.734035][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 29.734042][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 29.734048][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 29.734054][ C0] ? unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 29.734062][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 29.734070][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 29.734076][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 29.734083][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 29.734090][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 29.734095][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 29.734101][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 29.734107][ C0] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 29.734112][ C0] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 29.734117][ C0] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 29.734122][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 29.734132][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 29.734139][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 29.734147][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 29.734154][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 29.734161][ C0] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 29.734167][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 29.734173][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 29.734178][ 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) 
[ 29.734184][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 29.734189][ C0] ? rcu_core (kernel/rcu/tree.c:2834) 
[ 29.734193][ C0] ? handle_softirqs (kernel/softirq.c:580) 
[ 29.734201][ C0] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 29.734207][ C0] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 29.734213][ C0] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 29.734220][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 29.734228][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 29.734234][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 29.734239][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 29.734248][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 29.734256][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 29.734261][ C0] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 29.734266][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 29.734275][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 29.734281][ C0] handle_softirqs (kernel/softirq.c:580) 
[ 29.734289][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 29.734296][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 29.734302][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 29.734309][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 29.734315][ C0] kthread (kernel/kthread.c:464) 
[ 29.734322][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 29.734327][ C0] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 29.734333][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 29.734340][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 29.734346][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 29.734352][ C0] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 29.734357][ C0] ? __pfx_kthread (kernel/kthread.c:413) 


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