====================================== | [ 44.334976][ T66] #3: ffffffffab5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net (net/core/net_namespace.c:639) | [ 44.335253][ T66] #4: ffffffffab5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 44.335564][ T66] | [ 44.335564][ T66] stack backtrace: [ 44.336022][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.336219][ T66] Workqueue: netns cleanup_net [ 44.336387][ T66] Call Trace: [ 44.336512][ T66] [ 44.336589][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 44.336765][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 44.336932][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 44.337112][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 44.337313][ 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) [ 44.337489][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 44.337618][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 44.337783][ T66] ? spin_bug (kernel/locking/spinlock_debug.c:57 kernel/locking/spinlock_debug.c:78) [ 44.337907][ T66] ? debug_object_assert_init (./include/linux/err.h:81 lib/debugobjects.c:1010) [ 44.338077][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 44.338251][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.338473][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.338647][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 44.338812][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 44.338975][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.339195][ 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) [ 44.339339][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.339569][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 44.339746][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.339940][ T66] __dev_close_many (net/core/dev.c:1537 (discriminator 3)) [ 44.340120][ T66] ? __pfx___dev_close_many (net/core/dev.c:1525) [ 44.340304][ T66] dev_close_many (net/core/dev.c:1588) [ 44.340492][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 44.340665][ T66] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 44.340836][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 44.341002][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.341164][ T66] vlan_device_event (net/8021q/vlan.c:451) 8021q [ 44.341397][ T66] ? net_generic (./include/net/netns/generic.h:51) vxlan [ 44.341613][ T66] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 44.341842][ T66] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4737) vxlan [ 44.342080][ T66] ? packet_notifier (net/packet/af_packet.c:4282) [ 44.342269][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 44.342496][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 44.342671][ T66] dev_close_many (net/core/dev.c:1591) [ 44.342859][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 44.343049][ T66] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 44.343242][ T66] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 44.343436][ T66] unregister_netdevice_many_notify (net/core/dev.c:11549) [ 44.343656][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 44.343856][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 44.344070][ 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) [ 44.344239][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 44.344427][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 44.344641][ 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) [ 44.344832][ T66] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:585 net/ipv4/nexthop.c:2158 net/ipv4/nexthop.c:2666 net/ipv4/nexthop.c:4010) [ 44.345033][ T66] cleanup_net (net/core/net_namespace.c:644) [ 44.345197][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.345357][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 44.345517][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 44.345680][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 44.345842][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 44.346001][ T66] process_one_work (kernel/workqueue.c:3229) [ 44.346156][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 44.346307][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 44.346469][ T66] ? assign_work (kernel/workqueue.c:1200) [ 44.346630][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 44.346789][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 44.346991][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 44.347150][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 44.347440][ T66] kthread (kernel/kthread.c:389) [ 44.347565][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 44.347729][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 44.347894][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain