====================================== | [ 199.655696][ T66] #3: ffffffffa4de7a48 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net (net/core/net_namespace.c:639) | [ 199.656093][ T66] #4: ffffffffa4dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 199.656544][ T66] | [ 199.656544][ T66] stack backtrace: [ 199.657212][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 199.657496][ T66] Workqueue: netns cleanup_net [ 199.657747][ T66] Call Trace: [ 199.657931][ T66] [ 199.658060][ T66] dump_stack_lvl (lib/dump_stack.c:123) [ 199.658299][ T66] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 199.658541][ T66] validate_chain (kernel/locking/lockdep.c:3894) [ 199.658771][ T66] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 199.659011][ 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) [ 199.659256][ T66] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 199.659442][ T66] __lock_acquire (kernel/locking/lockdep.c:5226) [ 199.659689][ T66] ? spin_bug (kernel/locking/spinlock_debug.c:57 kernel/locking/spinlock_debug.c:78) [ 199.659878][ T66] ? debug_object_assert_init (./include/linux/err.h:81 lib/debugobjects.c:1010) [ 199.660125][ T66] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 199.660365][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 199.660653][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 199.660866][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 199.661118][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 199.661352][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 199.661651][ 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) [ 199.661841][ T66] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 199.662148][ T66] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 199.662396][ T66] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 199.662653][ T66] __dev_close_many (net/core/dev.c:1537 (discriminator 3)) [ 199.662892][ T66] ? __pfx___dev_close_many (net/core/dev.c:1525) [ 199.663137][ T66] dev_close_many (net/core/dev.c:1588) [ 199.663379][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 199.663625][ T66] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 199.663862][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 199.664109][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 199.664361][ T66] vlan_device_event (net/8021q/vlan.c:451) 8021q [ 199.664592][ T66] ? net_generic (./include/net/netns/generic.h:51) vxlan [ 199.664773][ T66] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 199.665069][ T66] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4737) vxlan [ 199.665388][ T66] ? packet_notifier (net/packet/af_packet.c:4282) [ 199.665644][ T66] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 199.665895][ T66] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 199.666105][ T66] dev_close_many (net/core/dev.c:1591) [ 199.666327][ T66] ? __lock_release (kernel/locking/lockdep.c:5525) [ 199.666547][ 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) [ 199.666783][ T66] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 199.667018][ T66] unregister_netdevice_many_notify (net/core/dev.c:11549) [ 199.667319][ T66] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 199.667557][ T66] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 199.667857][ 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) [ 199.668097][ T66] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 199.668318][ T66] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 199.668619][ 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) [ 199.668865][ 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) [ 199.669173][ T66] cleanup_net (net/core/net_namespace.c:644) [ 199.669411][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 199.669662][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 199.669900][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 199.670142][ T66] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 199.670381][ T66] ? process_one_work (kernel/workqueue.c:3205) [ 199.670621][ T66] process_one_work (kernel/workqueue.c:3229) [ 199.670869][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 199.671111][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 199.671365][ T66] ? assign_work (kernel/workqueue.c:1200) [ 199.671619][ T66] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 199.671863][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 199.672181][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 199.672430][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 199.672594][ T66] kthread (kernel/kthread.c:389) [ 199.672717][ T66] ? __pfx_kthread (kernel/kthread.c:342) [ 199.672925][ T66] ret_from_fork (arch/x86/kernel/process.c:147) [ 199.673164][ T66] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain