====================================== | [ 33.499336][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 33.499556][ T10] | [ 33.499625][ T10] | [ 33.499625][ T10] stack backtrace: [ 33.500073][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 33.500381][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 33.500558][ T10] Call Trace: [ 33.500666][ T10] [ 33.500739][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 33.500878][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 33.501014][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 33.501190][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 33.501489][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.501592][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 33.501739][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 33.501886][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 33.502027][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.502136][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 33.502363][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 33.502516][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 33.502665][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 33.502804][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 33.502948][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 33.503170][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 33.503307][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 33.503442][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.503635][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 33.503769][ 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) [ 33.503911][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.504019][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 33.504263][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 33.504402][ T10] ? __get_task_comm (fs/exec.c:1234) [ 33.504546][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.504653][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 33.504793][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 33.505018][ T10] ? __get_task_comm (fs/exec.c:1234) [ 33.505153][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.505294][ T10] ? __get_task_comm (fs/exec.c:1234) [ 33.505432][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 33.505661][ T10] ? __get_task_comm (fs/exec.c:1234) [ 33.505801][ T10] __get_task_comm (fs/exec.c:1234) [ 33.505943][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 33.506084][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 33.506308][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.506446][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 33.506586][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 33.506729][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 33.506978][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.507119][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.507255][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.507390][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.507528][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.507668][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.507804][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 33.507949][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.508091][ T10] ? kthread (kernel/kthread.c:388) [ 33.508281][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 33.508421][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 33.508563][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.508707][ T10] netdev_get_by_index (net/core/dev.c:914) [ 33.508937][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 33.509075][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 33.509249][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 33.509387][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 33.509525][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 33.509659][ T10] ? __kmalloc (mm/slub.c:3980) [ 33.509879][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 33.510016][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 33.510157][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 33.510293][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 33.510467][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 33.510604][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.510740][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 33.510967][ 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) [ 33.511101][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 33.511234][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.511374][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.511510][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.511647][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.511784][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 33.511922][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 33.512181][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.512317][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 33.512456][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 33.512597][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 33.512819][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.513036][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.513178][ 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) [ 33.513316][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 33.513487][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.513623][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.513843][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.513982][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 33.514122][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 33.514262][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.514402][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 33.514561][ T10] process_one_work (kernel/workqueue.c:3254) [ 33.514795][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 33.514928][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 33.515161][ T10] ? assign_work (kernel/workqueue.c:1209) [ 33.515297][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.515438][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 33.515576][ T10] kthread (kernel/kthread.c:388) [ 33.515681][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 33.515921][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 33.516063][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage