====================================== | [ 50.834697][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 50.834841][ T10] | [ 50.834921][ T10] | [ 50.834921][ T10] stack backtrace: [ 50.835391][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 50.835719][ T10] Workqueue: netns cleanup_net [ 50.835951][ T10] Call Trace: [ 50.836070][ T10] [ 50.836146][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 50.836298][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 50.836445][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 50.836741][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 50.836890][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 50.837004][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 50.837154][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 50.837309][ T10] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 50.837459][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 50.837605][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 50.837716][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 50.837866][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 50.838018][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 50.838167][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 50.838320][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 50.838547][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 50.838693][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 50.838933][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 50.839087][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 50.839212][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 50.839360][ T10] ? 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) [ 50.839507][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 50.839620][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 50.839858][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 50.840005][ T10] ? __get_task_comm (fs/exec.c:1234) [ 50.840152][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 50.840262][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 50.840414][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 50.840554][ T10] ? __get_task_comm (fs/exec.c:1234) [ 50.840699][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 50.840931][ T10] ? __get_task_comm (fs/exec.c:1234) [ 50.841086][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 50.841233][ T10] ? __get_task_comm (fs/exec.c:1234) [ 50.841374][ T10] __get_task_comm (fs/exec.c:1234) [ 50.841600][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 50.841836][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 50.841997][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 50.842140][ T10] ? rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) [ 50.842323][ T10] ? rt6_disable_ip (net/ipv6/route.c:4910) [ 50.842469][ T10] ? addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) [ 50.842618][ T10] ? addrconf_notify (net/ipv6/addrconf.c:3811) [ 50.842860][ T10] ? notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 50.843009][ T10] ? dev_close_many (net/core/dev.c:1571) [ 50.843153][ T10] ? unregister_netdevice_many_notify (net/core/dev.c:11146) [ 50.843335][ T10] ? default_device_exit_batch (net/core/dev.c:11707) [ 50.843514][ T10] ? cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 50.843658][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 50.843799][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 50.843939][ T10] ? kthread (kernel/kthread.c:388) [ 50.844049][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 50.844191][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 50.844338][ T10] ? in6_dev_get (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/addrconf.h:373) [ 50.844484][ T10] rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) [ 50.844671][ T10] rt6_disable_ip (net/ipv6/route.c:4910) [ 50.844815][ T10] ? __pfx_rt6_disable_ip (net/ipv6/route.c:4907) [ 50.845040][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 50.845152][ T10] addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) [ 50.845302][ T10] ? __try_to_del_timer_sync (kernel/time/timer.c:1500) [ 50.845453][ T10] ? __pfx_addrconf_ifdown.isra.0 (net/ipv6/addrconf.c:3841) [ 50.845761][ T10] addrconf_notify (net/ipv6/addrconf.c:3811) [ 50.845906][ T10] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 50.846051][ T10] dev_close_many (net/core/dev.c:1571) [ 50.846197][ T10] ? __pfx_dev_close_many (net/core/dev.c:1558) [ 50.846343][ T10] ? default_device_exit_batch (net/core/dev.c:11693) [ 50.846487][ T10] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) [ 50.846631][ T10] unregister_netdevice_many_notify (net/core/dev.c:11146) [ 50.846811][ T10] ? 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.c:81 kernel/locking/mutex.c:91) [ 50.846956][ T10] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11113) [ 50.847140][ T10] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11097) [ 50.847320][ T10] default_device_exit_batch (net/core/dev.c:11707) [ 50.847466][ T10] ? __pfx_default_device_exit_batch (net/core/dev.c:11682) [ 50.847648][ T10] ? ops_exit_list (net/core/net_namespace.c:169 (discriminator 3)) [ 50.847795][ T10] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 50.847939][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 50.848084][ T10] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 50.848308][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 50.848455][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 50.848600][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 50.848750][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 50.848979][ T10] process_one_work (kernel/workqueue.c:3254) [ 50.849126][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 50.849358][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 50.849506][ T10] ? assign_work (kernel/workqueue.c:1209) [ 50.849652][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 50.849800][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 50.850041][ T10] kthread (kernel/kthread.c:388) [ 50.850153][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 50.850301][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 50.850457][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage