====================================== | [ 16.166983][ T67] #3: ffffffffba807e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12103) | [ 16.167264][ T67] #4: ffffffffba7f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 16.167549][ T67] | [ 16.167549][ T67] stack backtrace: [ 16.167963][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.168140][ T67] Workqueue: netns cleanup_net [ 16.168283][ T67] Call Trace: [ 16.168387][ T67] [ 16.168458][ T67] dump_stack_lvl (lib/dump_stack.c:123) [ 16.168598][ T67] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 16.168752][ T67] validate_chain (kernel/locking/lockdep.c:3894) [ 16.168892][ T67] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.169038][ T67] ? 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) [ 16.169174][ T67] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.169283][ T67] __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.169426][ T67] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 16.169565][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.169737][ T67] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.169876][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.170016][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.170151][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.170292][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.170468][ T67] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 16.170572][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.170746][ T67] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 16.170885][ T67] ? __lock_release (kernel/locking/lockdep.c:5525) [ 16.171029][ T67] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.171171][ T67] __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)) [ 16.171310][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.171448][ T67] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 16.171618][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.171795][ T67] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.171935][ T67] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.172110][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.172249][ T67] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.172394][ T67] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.172566][ T67] ? 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) [ 16.172707][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 16.172854][ T67] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 16.173030][ T67] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 16.173175][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 16.173316][ T67] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 16.173454][ T67] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 16.173627][ T67] ? unregister_netdevice_queue (net/core/dev.c:11497) [ 16.173801][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 16.173970][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 16.174148][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 16.174291][ T67] ? unregister_netdevice_queue (net/core/dev.c:11497) [ 16.174463][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 16.174634][ T67] ? vrf_dellink (drivers/net/vrf.c:1668) [ 16.174773][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 16.174948][ T67] default_device_exit_batch (net/core/dev.c:12117) [ 16.175088][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12092) [ 16.175264][ T67] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 16.175408][ T67] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 16.175546][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.175687][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 16.175824][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.175963][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.176103][ T67] ? process_one_work (kernel/workqueue.c:3205) [ 16.176245][ T67] process_one_work (kernel/workqueue.c:3229) [ 16.176388][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 16.176526][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 16.176662][ T67] ? assign_work (kernel/workqueue.c:1200) [ 16.176805][ T67] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 16.176944][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.177121][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.177262][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.177399][ T67] kthread (kernel/kthread.c:389) [ 16.177505][ T67] ? __pfx_kthread (kernel/kthread.c:342) [ 16.177643][ T67] ret_from_fork (arch/x86/kernel/process.c:147) [ 16.177783][ T67] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain