====================================== | [ 16.796211][ T68] #3: ffffffffa3807e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 16.796551][ T68] #4: ffffffffa37f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 16.796870][ T68] | [ 16.796870][ T68] stack backtrace: [ 16.797345][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.797546][ T68] Workqueue: netns cleanup_net [ 16.797705][ T68] Call Trace: [ 16.797824][ T68] [ 16.797903][ T68] dump_stack_lvl (lib/dump_stack.c:123) [ 16.798061][ T68] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 16.798214][ T68] validate_chain (kernel/locking/lockdep.c:3894) [ 16.798367][ T68] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.798521][ T68] ? 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) [ 16.798676][ T68] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.798799][ T68] __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.798956][ T68] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 16.799114][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.799304][ T68] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.799461][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.799616][ T68] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.799770][ T68] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.799929][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.800122][ T68] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 16.800244][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.800439][ T68] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 16.800597][ T68] ? __lock_release (kernel/locking/lockdep.c:5525) [ 16.800754][ T68] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.800914][ T68] __netdev_upper_dev_unlink (net/core/dev.c:8000 (discriminator 11) net/core/dev.c:8017 (discriminator 11) net/core/dev.c:8167 (discriminator 11)) [ 16.801077][ T68] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.801234][ T68] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 16.801427][ T68] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.801623][ T68] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.801794][ T68] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.801985][ T68] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.802142][ T68] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.802301][ T68] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.802491][ T68] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:66) [ 16.802663][ T68] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 16.802815][ T68] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 16.803007][ T68] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 16.803166][ T68] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 16.803324][ T68] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 16.803488][ T68] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 16.803690][ T68] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 16.803881][ T68] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 16.804076][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.804263][ T68] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 16.804419][ T68] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 16.804613][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.804801][ T68] ? vrf_dellink (drivers/net/vrf.c:1668) [ 16.804958][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.805151][ T68] default_device_exit_batch (net/core/dev.c:12123) [ 16.805319][ T68] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 16.805521][ T68] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 16.805688][ T68] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 16.805856][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.806027][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 16.806182][ T68] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.806361][ T68] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.806531][ T68] ? process_one_work (kernel/workqueue.c:3205) [ 16.806692][ T68] process_one_work (kernel/workqueue.c:3229) [ 16.806847][ T68] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 16.807008][ T68] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 16.807166][ T68] ? assign_work (kernel/workqueue.c:1200) [ 16.807326][ T68] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 16.807482][ T68] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.807675][ T68] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.807842][ T68] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.807994][ T68] kthread (kernel/kthread.c:389) [ 16.808113][ T68] ? __pfx_kthread (kernel/kthread.c:342) [ 16.808268][ T68] ret_from_fork (arch/x86/kernel/process.c:147) [ 16.808422][ T68] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain