====================================== | [ 57.122828][ T67] #3: ffffffff9cdf1088 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 57.123105][ T67] #4: ffffffff9cddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 57.123387][ T67] | [ 57.123387][ T67] stack backtrace: [ 57.123864][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 57.124053][ T67] Workqueue: netns cleanup_net [ 57.124198][ T67] Call Trace: [ 57.124324][ T67] [ 57.124412][ T67] dump_stack_lvl (lib/dump_stack.c:123) [ 57.124565][ T67] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 57.124709][ T67] validate_chain (kernel/locking/lockdep.c:3894) [ 57.124866][ T67] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 57.125011][ T67] ? 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) [ 57.125153][ T67] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 57.125258][ T67] __lock_acquire (kernel/locking/lockdep.c:5226) [ 57.125402][ T67] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 57.125544][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 57.125719][ T67] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 57.125864][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 57.126012][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 57.126163][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 57.126304][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 57.126490][ T67] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 57.126608][ T67] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 57.126790][ T67] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 57.126942][ T67] ? __lock_release (kernel/locking/lockdep.c:5525) [ 57.127090][ T67] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 57.127239][ T67] __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)) [ 57.127389][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 57.127536][ T67] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 57.127716][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 57.127892][ T67] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 57.128034][ T67] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 57.128211][ T67] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 57.128429][ T67] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 57.128568][ T67] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 57.128740][ T67] ? 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) [ 57.128879][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 57.129097][ T67] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 57.129271][ T67] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 57.129414][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 57.129556][ T67] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 57.129768][ T67] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 57.129940][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 57.130109][ T67] ? default_device_exit_batch (net/core/dev.c:12109) [ 57.130323][ T67] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 57.130463][ T67] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 57.130632][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 57.130810][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 57.131055][ T67] default_device_exit_batch (net/core/dev.c:12123) [ 57.131193][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 57.131362][ T67] ? 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) [ 57.131575][ T67] ? 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) [ 57.131753][ T67] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 57.131890][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 57.132028][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 57.132239][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 57.132379][ T67] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 57.132516][ T67] ? process_one_work (kernel/workqueue.c:3205) [ 57.132654][ T67] process_one_work (kernel/workqueue.c:3229) [ 57.132874][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 57.133010][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 57.133150][ T67] ? assign_work (kernel/workqueue.c:1200) [ 57.133287][ T67] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 57.133509][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 57.133694][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 57.133833][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 57.134008][ T67] kthread (kernel/kthread.c:389) [ 57.134189][ T67] ? __pfx_kthread (kernel/kthread.c:342) [ 57.134326][ T67] ret_from_fork (arch/x86/kernel/process.c:147) [ 57.134464][ T67] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain