====================================== | [ 92.827365][ T66] #3: ffffffffb8c07e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 92.827664][ T66] #4: ffffffffb8bf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 92.827963][ T66] | [ 92.827963][ T66] stack backtrace: [ 92.828395][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 92.828586][ T66] Workqueue: netns cleanup_net [ 92.828740][ T66] Call Trace: [ 92.828852][ T66] [ 92.828928][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 92.829077][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 92.829228][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 92.829374][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 92.829520][ 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) [ 92.829663][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 92.829780][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 92.829928][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 92.830072][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 92.830253][ T66] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 92.830398][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 92.830543][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 92.830687][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 92.830832][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 92.831013][ 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) [ 92.831124][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 92.831317][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 92.831464][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 92.831606][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 92.831752][ 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)) [ 92.831896][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 92.832039][ T66] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 92.832215][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 92.832395][ T66] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 92.832538][ T66] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 92.832711][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 92.832853][ T66] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 92.832992][ T66] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 92.833181][ 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) [ 92.833323][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 92.833469][ T66] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 92.833640][ T66] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 92.833782][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 92.833926][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 92.834066][ T66] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 92.834241][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 92.834423][ T66] ? default_device_exit_batch (net/core/dev.c:12109) [ 92.834569][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 92.834708][ T66] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 92.834877][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 92.835050][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 92.835230][ T66] default_device_exit_batch (net/core/dev.c:12123) [ 92.835368][ T66] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 92.835545][ T66] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3)) [ 92.835689][ T66] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 92.835828][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 92.835966][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 92.836102][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 92.836242][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 92.836378][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 92.836524][ T66] process_one_work (kernel/workqueue.c:3229) [ 92.836670][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 92.836813][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 92.836953][ T66] ? assign_work (kernel/workqueue.c:1200) [ 92.837098][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 92.837250][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 92.837426][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 92.837566][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 92.837707][ T66] kthread (kernel/kthread.c:389) [ 92.837816][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 92.837957][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 92.838101][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain