====================================== | [ 64.867174][ T69] #3: ffffffffa67f1088 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12103) | [ 64.867510][ T69] #4: ffffffffa67dfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 64.867860][ T69] | [ 64.867860][ T69] stack backtrace: [ 64.868361][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 64.868575][ T69] Workqueue: netns cleanup_net [ 64.868768][ T69] Call Trace: [ 64.868895][ T69] [ 64.868984][ T69] dump_stack_lvl (lib/dump_stack.c:123) [ 64.869155][ T69] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 64.869328][ T69] validate_chain (kernel/locking/lockdep.c:3894) [ 64.869504][ T69] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 64.869670][ 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) [ 64.869841][ T69] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 64.869964][ T69] __lock_acquire (kernel/locking/lockdep.c:5226) [ 64.870137][ T69] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 64.870302][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 64.870508][ T69] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 64.870682][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 64.870849][ T69] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 64.871015][ T69] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 64.871180][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 64.871386][ 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) [ 64.871513][ T69] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 64.871720][ T69] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 64.871894][ T69] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406) [ 64.872095][ T69] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 64.872261][ 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)) [ 64.872426][ T69] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 64.872636][ T69] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 64.872802][ T69] ? del_nbp (net/bridge/br_if.c:215 net/bridge/br_if.c:359) bridge [ 64.873007][ 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) [ 64.873175][ T69] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 64.873344][ T69] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 64.873554][ T69] ? mutex_spin_on_owner (kernel/locking/mutex.c:353) [ 64.873717][ T69] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 64.873885][ T69] del_nbp (net/bridge/br_if.c:365) bridge [ 64.874092][ T69] br_del_if (net/bridge/br_if.c:741) bridge [ 64.874298][ T69] br_device_event (net/bridge/br.c:141) bridge [ 64.874504][ T69] ? __pfx_br_device_event (net/bridge/br.c:29) bridge [ 64.874745][ T69] ? nft_offload_netdev_event (net/netfilter/nf_tables_offload.c:677) nf_tables [ 64.874989][ T69] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 64.875155][ T69] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 64.875323][ T69] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 64.875528][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 64.875743][ T69] ? default_device_exit_batch (net/core/dev.c:12103) [ 64.875914][ T69] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 64.876081][ T69] ? unregister_netdevice_queue (net/core/dev.c:11497) [ 64.876285][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 64.876490][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496) [ 64.876697][ T69] default_device_exit_batch (net/core/dev.c:12117) [ 64.876869][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12092) [ 64.877076][ 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) [ 64.877243][ 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) [ 64.877458][ T69] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 64.877621][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 64.877787][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 64.877953][ T69] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 64.878123][ T69] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 64.878288][ T69] ? process_one_work (kernel/workqueue.c:3205) [ 64.878459][ T69] process_one_work (kernel/workqueue.c:3229) [ 64.878626][ T69] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 64.878791][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 64.878955][ T69] ? assign_work (kernel/workqueue.c:1200) [ 64.879128][ T69] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 64.879303][ T69] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 64.879512][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 64.879681][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 64.879849][ T69] kthread (kernel/kthread.c:389) [ 64.880151][ T69] ? __pfx_kthread (kernel/kthread.c:342) [ 64.880316][ T69] ret_from_fork (arch/x86/kernel/process.c:147) [ 64.880481][ T69] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain