====================================== | [ 16.295722][ T11] #3: ffffffff88807e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 16.296018][ T11] #4: ffffffff887f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 16.296314][ T11] | [ 16.296314][ T11] stack backtrace: [ 16.296750][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.296930][ T11] Workqueue: netns cleanup_net [ 16.297084][ T11] Call Trace: [ 16.297193][ T11] [ 16.297269][ T11] dump_stack_lvl (lib/dump_stack.c:123) [ 16.297420][ T11] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 16.297571][ T11] validate_chain (kernel/locking/lockdep.c:3894) [ 16.297722][ T11] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.297869][ T11] ? 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) [ 16.298014][ T11] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.298130][ T11] __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.298279][ T11] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 16.298427][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.298614][ T11] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.298762][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.298907][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.299053][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.299199][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.299383][ T11] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 16.299498][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.299684][ T11] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 16.299855][ T11] ? __lock_release (kernel/locking/lockdep.c:5525) [ 16.300005][ T11] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.300154][ T11] __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)) [ 16.300305][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.300454][ T11] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 16.300639][ T11] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.300828][ T11] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.300990][ T11] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.301174][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.301320][ T11] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.301467][ T11] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 16.301652][ T11] ? 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) [ 16.301796][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 16.301944][ T11] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 16.302123][ T11] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 16.302274][ T11] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 16.302425][ T11] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 16.302574][ T11] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 16.302762][ T11] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 16.302944][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 16.303131][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.303320][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 16.303467][ T11] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 16.303651][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.303829][ T11] ? vrf_dellink (drivers/net/vrf.c:1668) [ 16.303976][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.304156][ T11] default_device_exit_batch (net/core/dev.c:12123) [ 16.304305][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 16.304485][ T11] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 16.304630][ T11] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 16.304777][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.304924][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 16.305069][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.305215][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.305362][ T11] ? process_one_work (kernel/workqueue.c:3205) [ 16.305509][ T11] process_one_work (kernel/workqueue.c:3229) [ 16.305657][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 16.305803][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 16.305949][ T11] ? assign_work (kernel/workqueue.c:1200) [ 16.306096][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 16.306261][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.306409][ T11] kthread (kernel/kthread.c:389) [ 16.306521][ T11] ? __pfx_kthread (kernel/kthread.c:342) [ 16.306669][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 16.306817][ T11] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain