====================================== | [ 45.312657][ T66] #3: ffffffffbcc07e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 45.312962][ T66] #4: ffffffffbcbf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 45.313263][ T66] | [ 45.313263][ T66] stack backtrace: [ 45.313683][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.313858][ T66] Workqueue: netns cleanup_net [ 45.314012][ T66] Call Trace: [ 45.314117][ T66] [ 45.314190][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 45.314336][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 45.314479][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 45.314627][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 45.314769][ T66] ? 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) [ 45.314911][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 45.315021][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 45.315166][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 45.315303][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 45.315478][ T66] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 45.315620][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 45.315759][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 45.315898][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 45.316040][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 45.316217][ T66] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 45.316324][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 45.316497][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 45.316636][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 45.316785][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 45.316921][ T66] __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)) [ 45.317057][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 45.317198][ T66] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 45.317370][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 45.317554][ T66] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 45.317703][ T66] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 45.317881][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 45.318019][ T66] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 45.318180][ T66] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 45.318355][ T66] ? 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) [ 45.318492][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 45.318633][ T66] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 45.318804][ T66] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 45.318944][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 45.319087][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 45.319226][ T66] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 45.319403][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 45.319573][ T66] ? default_device_exit_batch (net/core/dev.c:12109) [ 45.319711][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 45.319846][ T66] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 45.320017][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 45.320188][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 45.320377][ T66] default_device_exit_batch (net/core/dev.c:12123) [ 45.320518][ T66] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 45.320688][ T66] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 45.320829][ T66] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 45.320967][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 45.321117][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 45.321256][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 45.321396][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 45.321535][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 45.321766][ T66] process_one_work (kernel/workqueue.c:3229) [ 45.321904][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 45.322043][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 45.322181][ T66] ? assign_work (kernel/workqueue.c:1200) [ 45.322337][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 45.322485][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 45.322658][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 45.322804][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 45.322942][ T66] kthread (kernel/kthread.c:389) [ 45.323050][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 45.323274][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 45.323412][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain