======================================
| [ 18.436712][ T151] #2: ffffffffafde7a48 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event (net/core/link_watch.c:282)
| [ 18.437114][ T151] #3: ffffffffafdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [   18.437601][  T151]
| [   18.437601][  T151] stack backtrace:
[   18.438315][  T151] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.438611][  T151] Workqueue: events_unbound linkwatch_event
[   18.438901][  T151] Call Trace:
[   18.439072][  T151]  <TASK>
[ 18.439205][ T151] dump_stack_lvl (lib/dump_stack.c:123)
[ 18.439436][ T151] print_circular_bug (kernel/locking/lockdep.c:2077)
[ 18.439642][ T151] check_noncircular (kernel/locking/lockdep.c:2206)
[ 18.439869][ T151] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 18.440046][ T151] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2182)
[ 18.440260][ T151] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 18.440487][ T151] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3528)
[ 18.440714][ T151] check_prev_add (kernel/locking/lockdep.c:3162)
[ 18.440935][ T151] validate_chain (kernel/locking/lockdep.c:3281 kernel/locking/lockdep.c:3904)
[ 18.441167][ T151] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 18.441399][ T151] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 18.441619][ T151] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 18.441780][ T151] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 18.442002][ T151] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 18.442219][ T151] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.442438][ T151] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872)
[ 18.442655][ T151] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 18.442867][ T151] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 18.443079][ T151] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 18.443301][ T151] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.443644][ T151] __mutex_lock (kernel/locking/mutex.c:587 kernel/locking/mutex.c:735)
[ 18.443870][ T151] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.444082][ T151] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.444301][ T151] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 18.444523][ T151] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 18.444761][ T151] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 18.445028][ T151] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 18.445255][ T151] ? __pfx_fib_sync_up (net/ipv4/fib_semantics.c:2111)
[ 18.445488][ T151] ? __pfx_rwsem_read_trylock (kernel/locking/rwsem.c:249)
[ 18.445709][ T151] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.445932][ T151] team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962)
[ 18.446157][ T151] team_device_event (drivers/net/team/team_core.c:3017)
[ 18.446390][ T151] ? trace_notifier_run (./include/trace/events/notifier.h:59 (discriminator 37))
[ 18.446612][ T151] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 18.446834][ T151] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 18.447071][ T151] netdev_state_change (net/core/dev.c:1381 net/core/dev.c:1372)
[ 18.447312][ T151] ? __pfx_netdev_state_change (net/core/dev.c:1373)
[ 18.447549][ T151] linkwatch_do_dev (net/core/link_watch.c:182)
[ 18.447773][ T151] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:241)
[ 18.448001][ T151] ? __pfx___linkwatch_run_queue (net/core/link_watch.c:191)
[ 18.448274][ T151] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 18.448499][ T151] linkwatch_event (net/core/link_watch.c:283)
[ 18.448711][ T151] process_one_work (kernel/workqueue.c:3229)
[ 18.448940][ T151] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 18.449145][ T151] ? __pfx_process_one_work (kernel/workqueue.c:3131)
[ 18.449373][ T151] ? assign_work (kernel/workqueue.c:1200)
[ 18.449600][ T151] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[ 18.449819][ T151] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)
[ 18.450079][ T151] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 18.450297][ T151] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 18.450509][ T151] kthread (kernel/kthread.c:389)
[ 18.450673][ T151] ? __pfx_kthread (kernel/kthread.c:342)
[ 18.450897][ T151] ret_from_fork (arch/x86/kernel/process.c:147)
[ 18.451134][ T151] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
print_circular_bug:check_noncircular:check_prev_add:validate_chain:__lock_acquire