======================================
| [   14.975206][    C1] 1 lock held by ksoftirqd/1/22:
| [ 14.975374][ C1] #0: ffffffff86574480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.975667][    C1]
| [   14.975667][    C1] stack backtrace:
[   14.975882][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.975883][    C1] Call Trace:
[   14.975885][    C1]  <TASK>
[ 14.975888][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.975893][ C1] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.975898][ C1] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.975903][ C1] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.975909][ C1] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.975913][ C1] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.975917][ C1] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.975921][ C1] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.975926][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.975929][ C1] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.975933][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.975939][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.975942][ C1] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.975946][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.975949][ C1] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.975952][ C1] simple_pin_fs (fs/libfs.c:1066) 
[ 14.975956][ C1] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.975959][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.975964][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.975967][ 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:2333) 
[ 14.975972][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.975975][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.975977][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 14.975981][ C1] ? kthread (kernel/kthread.c:464) 
[ 14.975984][ C1] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 14.975988][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 14.975991][ C1] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 14.975994][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 14.976000][ C1] __put_net (net/core/net_namespace.c:732) 
[ 14.976003][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.976007][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.976010][ C1] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.976014][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.976018][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.976022][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.976025][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.976029][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.976033][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 14.976036][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 14.976039][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 14.976041][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 14.976045][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 14.976048][ C1] kthread (kernel/kthread.c:464) 
[ 14.976051][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.976054][ C1] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 14.976057][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.976061][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.976064][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.976068][ C1] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 14.976071][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.976074][ C1] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   14.985858][    C1] RCU nest depth: 0, expected: 0
| [   14.986009][    C1] INFO: lockdep is turned off.
| [   14.986158][    C1] Preemption disabled at:
| [ 14.986160][ C1] handle_softirqs (kernel/softirq.c:553) 
[   14.986471][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.986472][    C1] Call Trace:
[   14.986474][    C1]  <TASK>
[ 14.986475][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.986480][ C1] __might_resched (kernel/sched/core.c:8819) 
[ 14.986485][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.986488][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.986490][ C1] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.986494][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.986498][ C1] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.986502][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.986504][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.986507][ C1] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.986512][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.986514][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.986518][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.986521][ 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:2333) 
[ 14.986525][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.986528][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.986530][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 14.986533][ C1] ? kthread (kernel/kthread.c:464) 
[ 14.986537][ C1] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 14.986540][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 14.986544][ C1] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 14.986548][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 14.986553][ C1] __put_net (net/core/net_namespace.c:732) 
[ 14.986556][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.986560][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.986563][ C1] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.986568][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.986571][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.986575][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.986579][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.986583][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.986586][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 14.986589][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 14.986592][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 14.986595][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 14.986598][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 14.986601][ C1] kthread (kernel/kthread.c:464) 
[ 14.986604][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.986607][ C1] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 14.986610][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.986614][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.986618][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.986621][ C1] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 14.986624][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 14.986627][ C1] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   16.918427][    C2] INFO: lockdep is turned off.
| [   16.918592][    C2] Preemption disabled at:
| [ 16.918594][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   16.918934][    C2] Tainted: [W]=WARN
[   16.918935][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.918937][    C2] Call Trace:
[   16.918939][    C2]  <TASK>
[ 16.918941][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.918947][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.918953][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.918957][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.918960][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.918965][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.918970][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.918975][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.918977][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.918982][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.918986][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.918989][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.918994][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.918997][ C2] ? __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:2333) 
[ 16.919002][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.919006][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.919009][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.919012][ C2] ? kthread (kernel/kthread.c:464) 
[ 16.919016][ C2] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.919021][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.919026][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 16.919030][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 16.919034][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.919038][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.919043][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.919046][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.919049][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.919052][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.919057][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.919061][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.919064][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.919070][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.919073][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.919076][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.919079][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.919082][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.919085][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.919088][ C2] kthread (kernel/kthread.c:464) 
[ 16.919091][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.919094][ C2] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 16.919097][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.919102][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.919105][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.919109][ C2] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.919112][ C2] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal