====================================== | [ 32.743661][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 32.743815][ T10] | [ 32.743893][ T10] | [ 32.743893][ T10] stack backtrace: [ 32.744396][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.744739][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.745024][ T10] Call Trace: [ 32.745141][ T10] [ 32.745220][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 32.745375][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 32.745532][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.745766][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 32.745954][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 32.746099][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.746202][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 32.746338][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 32.746574][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 32.746810][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.746920][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 32.747065][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 32.747216][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 32.747359][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 32.747505][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 32.747739][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 32.747888][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 32.748031][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 32.748168][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.748281][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.748442][ 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) [ 32.748683][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.748792][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 32.748941][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 32.749076][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.749306][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.749414][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 32.749560][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.749706][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.749857][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.750116][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.750270][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 32.750423][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.750564][ T10] __get_task_comm (fs/exec.c:1234) [ 32.750800][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 32.750949][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 32.751095][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.751239][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 32.751385][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 32.751525][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 32.751668][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.751917][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.752061][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.752209][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.752350][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.752490][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.752631][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 32.752784][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.752926][ T10] ? kthread (kernel/kthread.c:388) [ 32.753034][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 32.753164][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 32.753401][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.753546][ T10] netdev_get_by_index (net/core/dev.c:914) [ 32.753690][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 32.753833][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 32.754098][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 32.754242][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 32.754389][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 32.754536][ T10] ? __kmalloc (mm/slub.c:3980) [ 32.754676][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 32.754845][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 32.754977][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 32.755110][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 32.755275][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 32.755488][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.755619][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 32.755754][ 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) [ 32.755892][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 32.756100][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.756232][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.756367][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.756501][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.756708][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 32.756844][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 32.757010][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.757149][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 32.757365][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 32.757499][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 32.757631][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.757762][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.757971][ 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) [ 32.758102][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 32.758268][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.758406][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.758612][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.758744][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 32.758885][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.759029][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.759185][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.759409][ T10] process_one_work (kernel/workqueue.c:3254) [ 32.759556][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 32.759706][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 32.759854][ T10] ? assign_work (kernel/workqueue.c:1209) [ 32.760078][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.760213][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.760348][ T10] kthread (kernel/kthread.c:388) [ 32.760449][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 32.760656][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 32.760789][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage