====================================== | [ 253.068124][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 253.068495][ T10] | [ 253.068617][ T10] | [ 253.068617][ T10] stack backtrace: [ 253.069252][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 253.069834][ T10] Workqueue: netns cleanup_net [ 253.070095][ T10] Call Trace: [ 253.070262][ T10] [ 253.070345][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 253.070593][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 253.070798][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 253.071075][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 253.071303][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 253.071507][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 253.071722][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 253.071944][ T10] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 253.072172][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 253.072541][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 253.072714][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 253.072944][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 253.073166][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 253.073393][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 253.073766][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 253.073993][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 253.074219][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 253.074455][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 253.074940][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 253.075149][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 253.075388][ 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) [ 253.075614][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 253.075791][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 253.076171][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 253.076398][ T10] ? __get_task_comm (fs/exec.c:1234) [ 253.076630][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 253.076808][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 253.077183][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 253.077417][ T10] ? __get_task_comm (fs/exec.c:1234) [ 253.077648][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 253.077881][ T10] ? __get_task_comm (fs/exec.c:1234) [ 253.078151][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 253.078541][ T10] ? __get_task_comm (fs/exec.c:1234) [ 253.078757][ T10] __get_task_comm (fs/exec.c:1234) [ 253.078963][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 253.079128][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 253.079296][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 253.079468][ T10] ? rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) [ 253.079759][ T10] ? rt6_disable_ip (net/ipv6/route.c:4910) [ 253.079981][ T10] ? addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) [ 253.080215][ T10] ? addrconf_notify (net/ipv6/addrconf.c:3811) [ 253.080444][ T10] ? notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 253.080675][ T10] ? dev_close_many (net/core/dev.c:1571) [ 253.080913][ T10] ? unregister_netdevice_many_notify (net/core/dev.c:11146) [ 253.081193][ T10] ? default_device_exit_batch (net/core/dev.c:11707) [ 253.081473][ T10] ? cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 253.081700][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 253.081951][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 253.082328][ T10] ? kthread (kernel/kthread.c:388) [ 253.082503][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 253.082730][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 253.082982][ T10] ? in6_dev_get (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/addrconf.h:373) [ 253.083214][ T10] rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) [ 253.083500][ T10] rt6_disable_ip (net/ipv6/route.c:4910) [ 253.083723][ T10] ? __pfx_rt6_disable_ip (net/ipv6/route.c:4907) [ 253.083970][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 253.084142][ T10] addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) [ 253.084370][ T10] ? __try_to_del_timer_sync (kernel/time/timer.c:1500) [ 253.084619][ T10] ? __pfx_addrconf_ifdown.isra.0 (net/ipv6/addrconf.c:3841) [ 253.084923][ T10] addrconf_notify (net/ipv6/addrconf.c:3811) [ 253.085161][ T10] ? fib_netdev_event (net/ipv4/fib_frontend.c:1520) [ 253.085396][ T10] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 253.085626][ T10] dev_close_many (net/core/dev.c:1571) [ 253.085858][ T10] ? __pfx_dev_close_many (net/core/dev.c:1558) [ 253.086085][ T10] ? default_device_exit_batch (net/core/dev.c:11693) [ 253.086472][ T10] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) [ 253.086701][ T10] unregister_netdevice_many_notify (net/core/dev.c:11146) [ 253.086989][ 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) [ 253.087213][ T10] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11113) [ 253.087495][ T10] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11097) [ 253.087783][ T10] default_device_exit_batch (net/core/dev.c:11707) [ 253.087949][ T10] ? __pfx_default_device_exit_batch (net/core/dev.c:11682) [ 253.088134][ 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) [ 253.088307][ T10] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:585 net/ipv4/nexthop.c:2145 net/ipv4/nexthop.c:2653 net/ipv4/nexthop.c:4003) [ 253.088578][ T10] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 253.088766][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 253.088919][ T10] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 253.089073][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 253.089236][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 253.089426][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 253.089645][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 253.089982][ T10] process_one_work (kernel/workqueue.c:3254) [ 253.090169][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 253.090390][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 253.090625][ T10] ? assign_work (kernel/workqueue.c:1209) [ 253.091128][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 253.091366][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 253.091597][ T10] kthread (kernel/kthread.c:388) [ 253.091770][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 253.092135][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 253.092363][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage