====================================== | [ 33.778401][ T73] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 33.778654][ T73] | [ 33.778740][ T73] | [ 33.778740][ T73] stack backtrace: [ 33.779189][ T73] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 33.779633][ T73] Workqueue: ipv6_addrconf addrconf_dad_work [ 33.779941][ T73] Call Trace: [ 33.780064][ T73] [ 33.780164][ T73] dump_stack_lvl (lib/dump_stack.c:117) [ 33.780338][ T73] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 33.780509][ T73] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 33.780816][ T73] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 33.780984][ T73] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.781107][ T73] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 33.781286][ T73] check_irq_usage (kernel/locking/lockdep.c:2871) [ 33.781454][ T73] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 33.781620][ T73] ? 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) [ 33.781871][ T73] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 33.782044][ T73] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.782170][ T73] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 33.782410][ T73] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 33.782580][ T73] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 33.782832][ T73] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 33.782995][ T73] ? rmqueue (mm/page_alloc.c:2922 (discriminator 1)) [ 33.783124][ T73] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 33.783287][ T73] check_prev_add (kernel/locking/lockdep.c:3138) [ 33.783582][ T73] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 33.783753][ T73] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 33.783917][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.784045][ T73] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 33.784215][ T73] ? 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) [ 33.784380][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.784504][ T73] __lock_acquire (kernel/locking/lockdep.c:5137) [ 33.784762][ T73] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 33.784916][ T73] ? __get_task_comm (fs/exec.c:1234) [ 33.785081][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.785206][ T73] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 33.785457][ T73] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 33.785630][ T73] ? __get_task_comm (fs/exec.c:1234) [ 33.785794][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.785961][ T73] ? __get_task_comm (fs/exec.c:1234) [ 33.786207][ T73] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 33.786377][ T73] ? __get_task_comm (fs/exec.c:1234) [ 33.786542][ T73] __get_task_comm (fs/exec.c:1234) [ 33.786776][ T73] ref_tracker_alloc (lib/ref_tracker.c:217) [ 33.786937][ T73] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 33.787103][ T73] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.787266][ T73] ? netdev_get_by_index (net/core/dev.c:914) [ 33.787510][ T73] ? fib6_nh_init (net/ipv6/route.c:3541) [ 33.787671][ T73] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 33.787831][ T73] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.787996][ T73] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.788164][ T73] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.788333][ T73] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.788492][ T73] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.788653][ T73] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.788810][ T73] ? process_one_work (kernel/workqueue.c:3254) [ 33.788973][ T73] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.789131][ T73] ? kthread (kernel/kthread.c:388) [ 33.789254][ T73] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 33.789419][ T73] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 33.789584][ T73] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.789740][ T73] netdev_get_by_index (net/core/dev.c:914) [ 33.789899][ T73] fib6_nh_init (net/ipv6/route.c:3541) [ 33.790055][ T73] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 33.790330][ T73] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 33.790492][ T73] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 33.790651][ T73] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 33.790809][ T73] ? __kmalloc (mm/slub.c:3980) [ 33.790969][ T73] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 33.791210][ T73] ip6_route_info_create (net/ipv6/route.c:3808) [ 33.791460][ T73] ? __lock_release (kernel/locking/lockdep.c:5430) [ 33.791643][ T73] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 33.791845][ T73] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 33.792003][ T73] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.792167][ T73] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 33.792424][ T73] ? 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) [ 33.792594][ T73] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 33.792759][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.793017][ T73] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.793184][ T73] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.793354][ T73] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.793517][ T73] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 33.793772][ T73] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 33.793990][ T73] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.794155][ T73] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 33.794323][ T73] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 33.794483][ T73] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 33.794744][ T73] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.794907][ T73] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.795060][ T73] ? 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) [ 33.795228][ T73] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 33.795526][ T73] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.795698][ T73] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.795862][ T73] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.796031][ T73] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 33.796283][ T73] ? process_one_work (kernel/workqueue.c:3230) [ 33.796451][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.796624][ T73] ? process_one_work (kernel/workqueue.c:3230) [ 33.796871][ T73] process_one_work (kernel/workqueue.c:3254) [ 33.797038][ T73] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 33.797216][ T73] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 33.797384][ T73] ? assign_work (kernel/workqueue.c:1209) [ 33.797557][ T73] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.797815][ T73] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 33.798026][ T73] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 33.798183][ T73] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 33.798432][ T73] kthread (kernel/kthread.c:388) [ 33.798563][ T73] ? __pfx_kthread (kernel/kthread.c:341) [ 33.798737][ T73] ret_from_fork (arch/x86/kernel/process.c:147) [ 33.798906][ T73] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage