====================================== | [ 31.851856][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 31.852072][ T10] | [ 31.852189][ T10] | [ 31.852189][ T10] stack backtrace: [ 31.852885][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 31.853491][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 31.853778][ T10] Call Trace: [ 31.853943][ T10] [ 31.854052][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 31.854266][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 31.854627][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 31.854848][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 31.855137][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 31.855354][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 31.855662][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 31.855887][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 31.856108][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 31.856324][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 31.856487][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 31.856833][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 31.857044][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 31.857268][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 31.857488][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 31.857833][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 31.858045][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 31.858265][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 31.858477][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.858643][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 31.858983][ 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) [ 31.859193][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.859356][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 31.859561][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 31.859905][ T10] ? __get_task_comm (fs/exec.c:1234) [ 31.860134][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.860300][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 31.860508][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 31.860732][ T10] ? __get_task_comm (fs/exec.c:1234) [ 31.861205][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.861432][ T10] ? __get_task_comm (fs/exec.c:1234) [ 31.861654][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 31.861864][ T10] ? __get_task_comm (fs/exec.c:1234) [ 31.862072][ T10] __get_task_comm (fs/exec.c:1234) [ 31.862292][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 31.862500][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 31.862721][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 31.863077][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 31.863297][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 31.863507][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 31.863708][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 31.863898][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 31.864095][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 31.864298][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 31.864506][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.864711][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.865047][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 31.865250][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 31.865457][ T10] ? kthread (kernel/kthread.c:388) [ 31.865616][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 31.865951][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 31.866158][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 31.866375][ T10] netdev_get_by_index (net/core/dev.c:914) [ 31.866590][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 31.866947][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 31.867208][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 31.867418][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 31.867641][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 31.868002][ T10] ? __kmalloc (mm/slub.c:3980) [ 31.868220][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 31.868440][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 31.868646][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 31.868859][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 31.869126][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 31.869356][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 31.869566][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 31.869799][ 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) [ 31.870143][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 31.870351][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.870563][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 31.870761][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 31.870973][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 31.871178][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 31.871381][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 31.871651][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 31.871987][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 31.872201][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 31.872413][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 31.872625][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.872989][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.873204][ 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) [ 31.873427][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 31.873693][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 31.874044][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.874252][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.874467][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 31.874687][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 31.874915][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.875124][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 31.875340][ T10] process_one_work (kernel/workqueue.c:3254) [ 31.875550][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 31.875762][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 31.876129][ T10] ? assign_work (kernel/workqueue.c:1209) [ 31.876347][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 31.876568][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 31.876786][ T10] kthread (kernel/kthread.c:388) [ 31.877221][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 31.877429][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 31.877642][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage