====================================== | [ 16.874977][ T66] #3: ffffffffa9407e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12103) | [ 16.875255][ T66] #4: ffffffffa93f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 16.875532][ T66] | [ 16.875532][ T66] stack backtrace: [ 16.875948][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.876120][ T66] Workqueue: netns cleanup_net [ 16.876259][ T66] Call Trace: [ 16.876360][ T66] [ 16.876435][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 16.876575][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 16.876731][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 16.876869][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.877007][ 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) [ 16.877146][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.877251][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.877392][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 16.877529][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.877702][ T66] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.877840][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.877981][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.878119][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.878256][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.878434][ 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) [ 16.878538][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.878706][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 16.878840][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 16.878976][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.879110][ 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)) [ 16.879249][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.879385][ T66] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 16.879549][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.879716][ T66] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.879853][ T66] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.880020][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.880154][ T66] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.880290][ T66] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.880457][ 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) [ 16.880607][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 16.880744][ T66] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 16.880915][ T66] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 16.881054][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 16.881196][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 16.881335][ T66] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 16.881508][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 16.881678][ T66] ? default_device_exit_batch (net/core/dev.c:12103) [ 16.881816][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 16.881959][ T66] ? unregister_netdevice_queue (net/core/dev.c:11497) [ 16.882124][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 16.882292][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 16.882481][ T66] default_device_exit_batch (net/core/dev.c:12117) [ 16.882620][ T66] ? __pfx_default_device_exit_batch (net/core/dev.c:12092) [ 16.882791][ T66] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 16.882930][ T66] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 16.883067][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.883205][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 16.883343][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.883480][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.883616][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 16.883765][ T66] process_one_work (kernel/workqueue.c:3229) [ 16.883901][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 16.884035][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 16.884194][ T66] ? assign_work (kernel/workqueue.c:1200) [ 16.884336][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 16.884475][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.884646][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.884782][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.884919][ T66] kthread (kernel/kthread.c:389) [ 16.885023][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 16.885160][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 16.885299][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain