======================================
| [   12.997379][    C3] 1 lock held by ksoftirqd/3/32:
| [ 12.997553][ C3] #0: ffffffffa37793c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   12.997872][    C3]
| [   12.997872][    C3] stack backtrace:
[   12.998094][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.998096][    C3] Call Trace:
[   12.998099][    C3]  <TASK>
[ 12.998101][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.998108][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 12.998112][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 12.998119][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 12.998122][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 12.998125][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 12.998127][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 12.998133][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 12.998137][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 12.998140][ C3] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 12.998143][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.998146][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 12.998148][ C3] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 12.998152][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 12.998155][ C3] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 12.998157][ C3] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 12.998160][ C3] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 12.998162][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 12.998167][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.998172][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 12.998177][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 12.998181][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 12.998185][ C3] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 12.998188][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 12.998191][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 12.998194][ C3] ? __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) 
[ 12.998199][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 12.998202][ C3] ? rcu_core (kernel/rcu/tree.c:2834) 
[ 12.998205][ C3] ? handle_softirqs (kernel/softirq.c:580) 
[ 12.998209][ C3] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 12.998213][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 12.998219][ C3] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 12.998223][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 12.998228][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 12.998231][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.998234][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 12.998240][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 12.998243][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 12.998246][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.998249][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 12.998253][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 12.998256][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 12.998260][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 12.998263][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 12.998265][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 12.998270][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 12.998274][ C3] kthread (kernel/kthread.c:464) 
[ 12.998278][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.998281][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 12.998283][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 12.998286][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.998289][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.998293][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 12.998295][ C3] ? __pfx_kthread (kernel/kthread.c:413) 


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