====================================== | [ 118.261455][ T65] #3: ffffffffa57e7a48 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net (net/core/net_namespace.c:639) | [ 118.261753][ T65] #4: ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 118.262089][ T65] | [ 118.262089][ T65] stack backtrace: [ 118.262581][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 118.262791][ T65] Workqueue: netns cleanup_net [ 118.262965][ T65] Call Trace: [ 118.263092][ T65] [ 118.263181][ T65] dump_stack_lvl (lib/dump_stack.c:123) [ 118.263360][ T65] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 118.263533][ T65] validate_chain (kernel/locking/lockdep.c:3894) [ 118.263703][ T65] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 118.263880][ T65] ? 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) [ 118.264063][ T65] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 118.264192][ T65] __lock_acquire (kernel/locking/lockdep.c:5226) [ 118.264358][ T65] ? spin_bug (kernel/locking/spinlock_debug.c:57 kernel/locking/spinlock_debug.c:78) [ 118.264483][ T65] ? debug_object_assert_init (./include/linux/err.h:81 lib/debugobjects.c:1010) [ 118.264648][ T65] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 118.264812][ T65] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 118.265027][ T65] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 118.265197][ T65] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 118.265370][ T65] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 118.265543][ T65] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 118.265758][ T65] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 118.265885][ T65] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 118.266093][ T65] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 118.266259][ T65] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 118.266429][ T65] __dev_close_many (net/core/dev.c:1537 (discriminator 3)) [ 118.266589][ T65] ? __pfx___dev_close_many (net/core/dev.c:1525) [ 118.266761][ T65] dev_close_many (net/core/dev.c:1588) [ 118.266932][ T65] ? __lock_release (kernel/locking/lockdep.c:5525) [ 118.267106][ T65] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 118.267262][ T65] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 118.267424][ T65] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 118.267594][ T65] vlan_device_event (net/8021q/vlan.c:451) 8021q [ 118.267797][ T65] ? net_generic (./include/net/netns/generic.h:51) vxlan [ 118.267976][ T65] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 118.268187][ T65] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4737) vxlan [ 118.268409][ T65] ? packet_notifier (net/packet/af_packet.c:4282) [ 118.268582][ T65] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 118.268758][ T65] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 118.268936][ T65] dev_close_many (net/core/dev.c:1591) [ 118.269098][ T65] ? __lock_release (kernel/locking/lockdep.c:5525) [ 118.269263][ T65] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 118.269438][ T65] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 118.269607][ T65] unregister_netdevice_many_notify (net/core/dev.c:11549) [ 118.269806][ T65] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 118.269979][ T65] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 118.270186][ T65] ? 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) [ 118.270357][ T65] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 118.270521][ T65] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 118.270727][ T65] ? 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) [ 118.270894][ T65] ? 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) [ 118.271103][ T65] cleanup_net (net/core/net_namespace.c:644) [ 118.271272][ T65] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 118.271438][ T65] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 118.271610][ T65] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 118.271856][ T65] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 118.272020][ T65] ? process_one_work (kernel/workqueue.c:3205) [ 118.272185][ T65] process_one_work (kernel/workqueue.c:3229) [ 118.272431][ T65] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 118.272604][ T65] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 118.272783][ T65] ? assign_work (kernel/workqueue.c:1200) [ 118.273025][ T65] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 118.273191][ T65] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 118.273399][ T65] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 118.273561][ T65] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 118.273815][ T65] kthread (kernel/kthread.c:389) [ 118.273947][ T65] ? __pfx_kthread (kernel/kthread.c:342) [ 118.274107][ T65] ret_from_fork (arch/x86/kernel/process.c:147) [ 118.274270][ T65] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain