====================================== | [ 53.206005][ T11] #3: ffffffffb1df1088 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 53.206287][ T11] #4: ffffffffb1ddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 53.206577][ T11] | [ 53.206577][ T11] stack backtrace: [ 53.207008][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.207185][ T11] Workqueue: netns cleanup_net [ 53.207331][ T11] Call Trace: [ 53.207438][ T11] [ 53.207512][ T11] dump_stack_lvl (lib/dump_stack.c:123) [ 53.207664][ T11] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 53.207811][ T11] validate_chain (kernel/locking/lockdep.c:3894) [ 53.207952][ T11] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 53.208099][ 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) [ 53.208241][ T11] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 53.208349][ T11] __lock_acquire (kernel/locking/lockdep.c:5226) [ 53.208493][ T11] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 53.208633][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 53.208814][ T11] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 53.208954][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 53.209095][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 53.209241][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 53.209383][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 53.209558][ 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) [ 53.209667][ T11] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 53.209849][ T11] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 53.210006][ T11] ? __lock_release (kernel/locking/lockdep.c:5525) [ 53.210147][ T11] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 53.210292][ T11] __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)) [ 53.210433][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 53.210575][ T11] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 53.210753][ T11] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 53.210929][ T11] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 53.211071][ T11] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 53.211250][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 53.211392][ T11] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 53.211532][ T11] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 53.211713][ 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) [ 53.211854][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 53.211995][ T11] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 53.212174][ T11] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) [ 53.212320][ T11] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 53.212468][ T11] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 53.212610][ T11] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 53.212792][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 53.212967][ T11] ? default_device_exit_batch (net/core/dev.c:12109) [ 53.213109][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 53.213250][ T11] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 53.213431][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 53.213606][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 53.213787][ T11] default_device_exit_batch (net/core/dev.c:12123) [ 53.213927][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 53.214103][ 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) [ 53.214248][ 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) [ 53.214424][ T11] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 53.214570][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 53.214715][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 53.214854][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 53.214996][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 53.215138][ T11] ? process_one_work (kernel/workqueue.c:3205) [ 53.215280][ T11] process_one_work (kernel/workqueue.c:3229) [ 53.215423][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 53.215568][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 53.215717][ T11] ? assign_work (kernel/workqueue.c:1200) [ 53.215864][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 53.216008][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 53.216149][ T11] kthread (kernel/kthread.c:389) [ 53.216258][ T11] ? __pfx_kthread (kernel/kthread.c:342) [ 53.216396][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 53.216543][ T11] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain