====================================== | [ 31.165931][ T69] #3: ffffffff85bf1088 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 31.166215][ T69] #4: ffffffff85bdfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 31.166498][ T69] | [ 31.166498][ T69] stack backtrace: [ 31.166933][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 31.167111][ T69] Workqueue: netns cleanup_net [ 31.167262][ T69] Call Trace: [ 31.167369][ T69] [ 31.167443][ T69] dump_stack_lvl (lib/dump_stack.c:123) [ 31.167592][ T69] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 31.167747][ T69] validate_chain (kernel/locking/lockdep.c:3894) [ 31.167895][ T69] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 31.168038][ T69] ? 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) [ 31.168181][ T69] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 31.168290][ T69] __lock_acquire (kernel/locking/lockdep.c:5226) [ 31.168435][ T69] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 31.168576][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 31.168779][ T69] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 31.168941][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 31.169114][ T69] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 31.169259][ T69] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 31.169403][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 31.169582][ T69] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 31.169745][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 31.169928][ T69] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 31.170070][ T69] ? __lock_release (kernel/locking/lockdep.c:5525) [ 31.170219][ T69] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 31.170364][ T69] __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)) [ 31.170508][ T69] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 31.170657][ T69] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 31.170834][ T69] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 31.171012][ T69] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 31.171154][ T69] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 31.171335][ T69] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 31.171478][ T69] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 31.171627][ T69] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 31.171806][ T69] ? 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) [ 31.171949][ T69] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 31.172095][ T69] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 31.172273][ T69] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 31.172420][ T69] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 31.172581][ T69] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 31.172752][ T69] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 31.172932][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 31.173113][ T69] ? default_device_exit_batch (net/core/dev.c:12109) [ 31.173257][ T69] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 31.173412][ T69] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 31.173593][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 31.173787][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 31.173968][ T69] default_device_exit_batch (net/core/dev.c:12123) [ 31.174109][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 31.174287][ T69] ? 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) [ 31.174456][ T69] ? 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) [ 31.174673][ T69] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 31.174820][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 31.174982][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 31.175148][ T69] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 31.175333][ T69] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 31.175509][ T69] ? process_one_work (kernel/workqueue.c:3205) [ 31.175700][ T69] process_one_work (kernel/workqueue.c:3229) [ 31.175937][ T69] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 31.176168][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 31.176399][ T69] ? assign_work (kernel/workqueue.c:1200) [ 31.176626][ T69] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 31.176851][ T69] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 31.177127][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 31.177340][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 31.177572][ T69] kthread (kernel/kthread.c:389) [ 31.177740][ T69] ? __pfx_kthread (kernel/kthread.c:342) [ 31.177964][ T69] ret_from_fork (arch/x86/kernel/process.c:147) [ 31.178185][ T69] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain