======================================
| [ 2009.381973][    C1] 1 lock held by ksoftirqd/1/23:
| [ 2009.382054][    C1]  #0: ffffffff9558bc80 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [ 2009.382193][    C1]
| [ 2009.382193][    C1] stack backtrace:
[ 2009.382296][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 2009.382298][    C1] Call Trace:
[ 2009.382299][    C1]  <TASK>
[ 2009.382301][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[ 2009.382306][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[ 2009.382309][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[ 2009.382311][    C1]  ? kthread (kernel/kthread.c:436)
[ 2009.382314][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[ 2009.382315][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 2009.382317][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[ 2009.382319][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[ 2009.382320][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[ 2009.382322][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382325][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 2009.382326][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2009.382328][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382330][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 2009.382332][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[ 2009.382333][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2009.382334][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2009.382336][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[ 2009.382337][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[ 2009.382339][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[ 2009.382342][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382343][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[ 2009.382345][    C1]  ? finish_task_switch.isra.0 (kernel/sched/sched.h:1644 kernel/sched/core.c:5125 kernel/sched/core.c:5243)
[ 2009.382347][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382349][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[ 2009.382352][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[ 2009.382354][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[ 2009.382355][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 2009.382357][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[ 2009.382358][    C1]  handle_softirqs (kernel/softirq.c:622)
[ 2009.382361][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[ 2009.382362][    C1]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[ 2009.382364][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382366][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2009.382367][    C1]  run_ksoftirqd (kernel/softirq.c:1076 kernel/softirq.c:1068)
[ 2009.382369][    C1]  smpboot_thread_fn (kernel/smpboot.c:160)
[ 2009.382372][    C1]  ? sort_range (kernel/range.c:164)
[ 2009.382373][    C1]  kthread (kernel/kthread.c:436)
[ 2009.382375][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[ 2009.382376][    C1]  ? kthread_affine_node (kernel/kthread.c:378)
[ 2009.382378][    C1]  ret_from_fork (arch/x86/kernel/process.c:158)
[ 2009.382381][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[ 2009.382383][    C1]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[ 2009.382385][    C1]  ? kthread_affine_node (kernel/kthread.c:378)


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