====================================== | [ 17.506914][ T66] #3: ffffffffb9a07e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 17.507225][ T66] #4: ffffffffb99f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 17.507542][ T66] | [ 17.507542][ T66] stack backtrace: [ 17.508003][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.508195][ T66] Workqueue: netns cleanup_net [ 17.508364][ T66] Call Trace: [ 17.508483][ T66] [ 17.508564][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 17.508720][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 17.508873][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 17.509032][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 17.509189][ 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) [ 17.509339][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 17.509457][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 17.509623][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 17.509779][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 17.509967][ T66] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 17.510120][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 17.510273][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 17.510429][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 17.510584][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 17.510777][ 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) [ 17.510897][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 17.511089][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 17.511243][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 17.511392][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 17.511549][ 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)) [ 17.511703][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 17.511862][ T66] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 17.512076][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 17.512267][ T66] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 17.512423][ T66] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 17.512613][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 17.512768][ T66] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 17.512920][ T66] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 17.513112][ 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) [ 17.513267][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 17.513424][ T66] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 17.513614][ T66] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 17.513771][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 17.513927][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 17.514087][ T66] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 17.514281][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 17.514472][ T66] ? default_device_exit_batch (net/core/dev.c:12109) [ 17.514629][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 17.514781][ T66] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 17.514973][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 17.515163][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 17.515365][ T66] default_device_exit_batch (net/core/dev.c:12123) [ 17.515523][ T66] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 17.515712][ T66] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 17.515869][ T66] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 17.516027][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 17.516186][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 17.516339][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 17.516494][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 17.516646][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 17.516799][ T66] process_one_work (kernel/workqueue.c:3229) [ 17.516956][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 17.517189][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 17.517344][ T66] ? assign_work (kernel/workqueue.c:1200) [ 17.517503][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 17.517656][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 17.517850][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 17.518081][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 17.518229][ T66] kthread (kernel/kthread.c:389) [ 17.518346][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 17.518498][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 17.518653][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain