====================================== | [ 294.635897][ T67] #3: ffffffff8fc07e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 294.636195][ T67] #4: ffffffff8fbf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 294.636494][ T67] | [ 294.636494][ T67] stack backtrace: [ 294.636940][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 294.637139][ T67] Workqueue: netns cleanup_net [ 294.637284][ T67] Call Trace: [ 294.637399][ T67] [ 294.637471][ T67] dump_stack_lvl (lib/dump_stack.c:123) [ 294.637622][ T67] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 294.637768][ T67] validate_chain (kernel/locking/lockdep.c:3894) [ 294.637909][ T67] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 294.638048][ 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) [ 294.638197][ T67] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 294.638302][ T67] __lock_acquire (kernel/locking/lockdep.c:5226) [ 294.638470][ T67] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 294.638614][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 294.638796][ T67] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 294.638936][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 294.639075][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 294.639221][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 294.639365][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 294.639542][ 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) [ 294.639657][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 294.639837][ T67] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 294.639986][ T67] ? __lock_release (kernel/locking/lockdep.c:5525) [ 294.640137][ T67] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 294.640286][ 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)) [ 294.640434][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 294.640573][ T67] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 294.640759][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 294.640948][ T67] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 294.641102][ T67] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 294.641280][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 294.641434][ T67] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 294.641578][ T67] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 294.641849][ 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) [ 294.641988][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 294.642129][ T67] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 294.642305][ T67] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 294.642453][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 294.642601][ T67] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 294.642746][ T67] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 294.642929][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 294.643104][ T67] ? default_device_exit_batch (net/core/dev.c:12109) [ 294.643244][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 294.643383][ T67] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 294.643566][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 294.643742][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 294.643924][ T67] default_device_exit_batch (net/core/dev.c:12123) [ 294.644070][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 294.644343][ T67] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 294.644482][ T67] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 294.644635][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 294.644774][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 294.644909][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 294.645049][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 294.645190][ T67] ? process_one_work (kernel/workqueue.c:3205) [ 294.645345][ T67] process_one_work (kernel/workqueue.c:3229) [ 294.645491][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 294.645711][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 294.645865][ T67] ? assign_work (kernel/workqueue.c:1200) [ 294.646009][ T67] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 294.646151][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 294.646330][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 294.646466][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 294.646611][ T67] kthread (kernel/kthread.c:389) [ 294.646719][ T67] ? __pfx_kthread (kernel/kthread.c:342) [ 294.646868][ T67] ret_from_fork (arch/x86/kernel/process.c:147) [ 294.647008][ T67] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain