====================================== | [ 49.644649][ T11] #3: ffffffff96be7a48 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net (net/core/net_namespace.c:639) | [ 49.645048][ T11] #4: ffffffff96bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 49.645499][ T11] | [ 49.645499][ T11] stack backtrace: [ 49.646166][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 49.646450][ T11] Workqueue: netns cleanup_net [ 49.646684][ T11] Call Trace: [ 49.646854][ T11] [ 49.646977][ T11] dump_stack_lvl (lib/dump_stack.c:123) [ 49.647209][ T11] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 49.647432][ T11] validate_chain (kernel/locking/lockdep.c:3894) [ 49.647660][ T11] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 49.647895][ T11] ? 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) [ 49.648125][ T11] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 49.648300][ T11] __lock_acquire (kernel/locking/lockdep.c:5226) [ 49.648521][ T11] ? spin_bug (kernel/locking/spinlock_debug.c:57 kernel/locking/spinlock_debug.c:78) [ 49.648702][ T11] ? debug_object_assert_init (./include/linux/err.h:81 lib/debugobjects.c:1010) [ 49.648927][ T11] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 49.649155][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 49.649434][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 49.649674][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 49.649898][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 49.650127][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 49.650411][ T11] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 49.650530][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 49.650709][ T11] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 49.650853][ T11] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 49.651002][ T11] __dev_close_many (net/core/dev.c:1537 (discriminator 3)) [ 49.651151][ T11] ? __pfx___dev_close_many (net/core/dev.c:1525) [ 49.651332][ T11] dev_close_many (net/core/dev.c:1588) [ 49.651514][ T11] ? __lock_release (kernel/locking/lockdep.c:5525) [ 49.651699][ T11] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 49.651867][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 49.652049][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 49.652256][ T11] vlan_device_event (net/8021q/vlan.c:451) 8021q [ 49.652544][ T11] ? net_generic (./include/net/netns/generic.h:51) vxlan [ 49.652797][ T11] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 49.653006][ T11] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4737) vxlan [ 49.653269][ T11] ? packet_notifier (net/packet/af_packet.c:4282) [ 49.653423][ T11] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 49.653571][ T11] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 49.653752][ T11] dev_close_many (net/core/dev.c:1591) [ 49.653895][ T11] ? __lock_release (kernel/locking/lockdep.c:5525) [ 49.654041][ T11] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 49.654188][ T11] ? __pfx_dev_close_many (net/core/dev.c:1578) [ 49.654397][ T11] unregister_netdevice_many_notify (net/core/dev.c:11549) [ 49.654577][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 49.654723][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 49.654900][ T11] ? 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) [ 49.655047][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 49.655191][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 49.655428][ T11] ? 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) [ 49.655696][ T11] ? 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) [ 49.655877][ T11] cleanup_net (net/core/net_namespace.c:644) [ 49.656027][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 49.656239][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 49.656434][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 49.656725][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 49.656875][ T11] ? process_one_work (kernel/workqueue.c:3205) [ 49.657174][ T11] process_one_work (kernel/workqueue.c:3229) [ 49.657382][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 49.657631][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 49.657773][ T11] ? assign_work (kernel/workqueue.c:1200) [ 49.657979][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 49.658123][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 49.658389][ T11] kthread (kernel/kthread.c:389) [ 49.658501][ T11] ? __pfx_kthread (kernel/kthread.c:342) [ 49.658676][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 49.658853][ T11] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain