====================================== | [ 52.847590][ T67] #3: ffffffff89607e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 52.847871][ T67] #4: ffffffff895f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 52.848149][ T67] | [ 52.848149][ T67] stack backtrace: [ 52.848568][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 52.848738][ T67] Workqueue: netns cleanup_net [ 52.848879][ T67] Call Trace: [ 52.848983][ T67] [ 52.849055][ T67] dump_stack_lvl (lib/dump_stack.c:123) [ 52.849200][ T67] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 52.849344][ T67] validate_chain (kernel/locking/lockdep.c:3894) [ 52.849487][ T67] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 52.849627][ 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) [ 52.849765][ T67] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 52.849872][ T67] __lock_acquire (kernel/locking/lockdep.c:5226) [ 52.850013][ T67] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 52.850153][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 52.850326][ T67] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 52.850466][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 52.850608][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 52.850747][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 52.850881][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 52.851051][ 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) [ 52.851159][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 52.851327][ T67] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 52.851461][ T67] ? __lock_release (kernel/locking/lockdep.c:5525) [ 52.851601][ T67] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 52.851737][ 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)) [ 52.851875][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 52.852011][ T67] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 52.852181][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 52.852350][ T67] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 52.852494][ T67] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 52.852663][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 52.852798][ T67] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 52.852934][ T67] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 52.853101][ 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) [ 52.853239][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 52.853377][ T67] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 52.853550][ T67] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 52.853688][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 52.853828][ T67] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 52.853966][ T67] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 52.854136][ T67] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 52.854304][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 52.854475][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 52.854646][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 52.854782][ T67] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 52.854952][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 52.855119][ T67] ? vrf_dellink (drivers/net/vrf.c:1668) [ 52.855262][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 52.855434][ T67] default_device_exit_batch (net/core/dev.c:12123) [ 52.855573][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 52.855742][ T67] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 52.855883][ T67] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 52.856021][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 52.856160][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 52.856297][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 52.856434][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 52.856573][ T67] ? process_one_work (kernel/workqueue.c:3205) [ 52.856711][ T67] process_one_work (kernel/workqueue.c:3229) [ 52.856845][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 52.856982][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 52.857120][ T67] ? assign_work (kernel/workqueue.c:1200) [ 52.857260][ T67] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 52.857396][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 52.857570][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 52.857706][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 52.857842][ T67] kthread (kernel/kthread.c:389) [ 52.857947][ T67] ? __pfx_kthread (kernel/kthread.c:342) [ 52.858083][ T67] ret_from_fork (arch/x86/kernel/process.c:147) [ 52.858222][ T67] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain