====================================== | [ 97.230003][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 97.230142][ T10] | [ 97.230209][ T10] | [ 97.230209][ T10] stack backtrace: [ 97.230586][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 97.230882][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 97.231055][ T10] Call Trace: [ 97.231162][ T10] [ 97.231309][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 97.231454][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 97.231587][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 97.231730][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 97.231978][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 97.232111][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 97.232216][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 97.232349][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 97.232485][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 97.232697][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 97.232796][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 97.232939][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 97.233074][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 97.233283][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 97.233417][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 97.233554][ T10] ? stack_depot_save_flags (lib/stackdepot.c:671) [ 97.233686][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 97.233897][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 97.234034][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 97.234171][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 97.234308][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 97.234442][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 97.234622][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 97.234762][ 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) [ 97.234893][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 97.234996][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 97.235211][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 97.235345][ T10] ? __get_task_comm (fs/exec.c:1234) [ 97.235483][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 97.235584][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 97.235716][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 97.235926][ T10] ? __get_task_comm (fs/exec.c:1234) [ 97.236057][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 97.236187][ T10] ? __get_task_comm (fs/exec.c:1234) [ 97.236319][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 97.236529][ T10] ? __get_task_comm (fs/exec.c:1234) [ 97.236668][ T10] __get_task_comm (fs/exec.c:1234) [ 97.236800][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 97.236933][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 97.237140][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 97.237271][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 97.237401][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 97.237532][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 97.237662][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 97.237877][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 97.238011][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 97.238144][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 97.238275][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 97.238488][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 97.238619][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 97.238751][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 97.238881][ T10] ? kthread (kernel/kthread.c:388) [ 97.238990][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 97.239122][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 97.239256][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 97.239388][ T10] netdev_get_by_index (net/core/dev.c:914) [ 97.239520][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 97.239728][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 97.239893][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 97.240024][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 97.240162][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 97.240381][ T10] ? __kmalloc (mm/slub.c:3980) [ 97.240517][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 97.240653][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 97.240785][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 97.240994][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 97.241166][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 97.241298][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 97.241434][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 97.241652][ 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) [ 97.241788][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 97.241920][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 97.242058][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 97.242271][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 97.242404][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 97.242539][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 97.242671][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 97.242925][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 97.243061][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 97.243197][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 97.243328][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 97.243538][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 97.243672][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 97.243805][ 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) [ 97.243945][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 97.244182][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 97.244318][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 97.244458][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 97.244597][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 97.244732][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 97.244940][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 97.245071][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 97.245208][ T10] process_one_work (kernel/workqueue.c:3254) [ 97.245343][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 97.245555][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 97.245690][ T10] ? assign_work (kernel/workqueue.c:1209) [ 97.245821][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 97.245959][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 97.246168][ T10] kthread (kernel/kthread.c:388) [ 97.246266][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 97.246404][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 97.246544][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage