====================================== | [ 32.861464][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 32.861705][ T71] | [ 32.861789][ T71] | [ 32.861789][ T71] stack backtrace: [ 32.862203][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.862652][ T71] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.862855][ T71] Call Trace: [ 32.862970][ T71] [ 32.863050][ T71] dump_stack_lvl (lib/dump_stack.c:117) [ 32.863209][ T71] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 32.863371][ T71] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.863530][ T71] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 32.863724][ T71] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 32.863882][ T71] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.864002][ T71] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 32.864159][ T71] check_irq_usage (kernel/locking/lockdep.c:2871) [ 32.864322][ T71] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 32.864562][ T71] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.864682][ T71] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 32.864840][ T71] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 32.864974][ T71] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 32.865192][ T71] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 32.865351][ T71] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 32.865508][ T71] check_prev_add (kernel/locking/lockdep.c:3138) [ 32.865661][ T71] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 32.865976][ T71] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 32.866112][ T71] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.866225][ T71] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.866380][ T71] ? 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) [ 32.866530][ T71] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.866736][ T71] __lock_acquire (kernel/locking/lockdep.c:5137) [ 32.866880][ T71] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 32.867033][ T71] ? __get_task_comm (fs/exec.c:1234) [ 32.867189][ T71] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.867308][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 32.867537][ T71] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.867719][ T71] ? __get_task_comm (fs/exec.c:1234) [ 32.867892][ T71] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.868044][ T71] ? __get_task_comm (fs/exec.c:1234) [ 32.868278][ T71] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 32.868442][ T71] ? __get_task_comm (fs/exec.c:1234) [ 32.868595][ T71] __get_task_comm (fs/exec.c:1234) [ 32.868746][ T71] ref_tracker_alloc (lib/ref_tracker.c:217) [ 32.868982][ T71] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 32.869130][ T71] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.869285][ T71] ? netdev_get_by_index (net/core/dev.c:914) [ 32.869435][ T71] ? fib6_nh_init (net/ipv6/route.c:3541) [ 32.869662][ T71] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 32.869793][ T71] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.869938][ T71] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.870091][ T71] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.870248][ T71] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.870482][ T71] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.870638][ T71] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.870792][ T71] ? process_one_work (kernel/workqueue.c:3254) [ 32.870950][ T71] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.871108][ T71] ? kthread (kernel/kthread.c:388) [ 32.871225][ T71] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 32.871376][ T71] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 32.871533][ T71] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.871690][ T71] netdev_get_by_index (net/core/dev.c:914) [ 32.871847][ T71] fib6_nh_init (net/ipv6/route.c:3541) [ 32.872008][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 32.872196][ T71] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 32.872432][ T71] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 32.872587][ T71] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 32.872735][ T71] ? __kmalloc (mm/slub.c:3980) [ 32.872891][ T71] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 32.873047][ T71] ip6_route_info_create (net/ipv6/route.c:3808) [ 32.873271][ T71] ? __lock_release (kernel/locking/lockdep.c:5430) [ 32.873414][ T71] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 32.873603][ T71] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 32.873746][ T71] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.873990][ T71] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 32.874147][ T71] ? 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) [ 32.874290][ T71] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 32.874445][ T71] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.874681][ T71] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.874838][ T71] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.874977][ T71] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.875111][ T71] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 32.875345][ T71] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 32.875534][ T71] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.875696][ T71] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 32.875854][ T71] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 32.875991][ T71] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 32.876126][ T71] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.876257][ T71] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.876392][ T71] ? 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) [ 32.876525][ T71] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 32.876689][ T71] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.876823][ T71] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.876973][ T71] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.877311][ T71] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 32.877446][ T71] ? process_one_work (kernel/workqueue.c:3230) [ 32.877578][ T71] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.877730][ T71] ? process_one_work (kernel/workqueue.c:3230) [ 32.877866][ T71] process_one_work (kernel/workqueue.c:3254) [ 32.878002][ T71] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 32.878137][ T71] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 32.878278][ T71] ? assign_work (kernel/workqueue.c:1209) [ 32.878416][ T71] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.878551][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 32.878718][ T71] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.878859][ T71] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.878994][ T71] kthread (kernel/kthread.c:388) [ 32.879181][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 32.879314][ T71] ret_from_fork (arch/x86/kernel/process.c:147) [ 32.879496][ T71] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage