====================================== | [ 35.526600][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 35.526835][ T10] | [ 35.526953][ T10] | [ 35.526953][ T10] stack backtrace: [ 35.527580][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 35.528391][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 35.528693][ T10] Call Trace: [ 35.528870][ T10] [ 35.528990][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 35.529370][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 35.529609][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.529832][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 35.530264][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 35.530486][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.530653][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 35.530867][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 35.531098][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 35.531319][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.531478][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 35.531685][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 35.531903][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 35.532127][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 35.532356][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 35.532718][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 35.532925][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 35.533186][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 35.533404][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.533705][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.533928][ 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) [ 35.534146][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.534312][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 35.534528][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 35.534867][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.535078][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.535235][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 35.535443][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 35.535817][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.536032][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.536248][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.536470][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 35.536826][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.537058][ T10] __get_task_comm (fs/exec.c:1234) [ 35.537300][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 35.537537][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 35.537775][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.538134][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 35.538352][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 35.538554][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 35.538768][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.539131][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.539349][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.539707][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.539928][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.540137][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.540511][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 35.540726][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.540944][ T10] ? kthread (kernel/kthread.c:388) [ 35.541131][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 35.541375][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 35.541599][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.541818][ T10] netdev_get_by_index (net/core/dev.c:914) [ 35.542180][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 35.542407][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 35.542825][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 35.543046][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 35.543270][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 35.543637][ T10] ? __kmalloc (mm/slub.c:3980) [ 35.543858][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 35.544078][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 35.544292][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 35.544656][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 35.544934][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 35.545160][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.545393][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 35.545767][ T10] ? do_raw_write_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qrwlock.h:98 kernel/locking/spinlock_debug.c:211) [ 35.545996][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 35.546370][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.546613][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.546835][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.547061][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.547424][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 35.547637][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 35.547912][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.548264][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 35.548481][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 35.548690][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 35.548909][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.549128][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.549356][ 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) [ 35.549565][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 35.549967][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.550193][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.550411][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.550770][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 35.550990][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 35.551355][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.551567][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 35.551782][ T10] process_one_work (kernel/workqueue.c:3254) [ 35.552026][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 35.552247][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 35.552609][ T10] ? assign_work (kernel/workqueue.c:1209) [ 35.553002][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.553239][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 35.553453][ T10] kthread (kernel/kthread.c:388) [ 35.553618][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 35.553837][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 35.554049][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage