====================================== | [ 32.346268][ T73] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 32.346400][ T73] | [ 32.346468][ T73] | [ 32.346468][ T73] stack backtrace: [ 32.346914][ T73] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.347210][ T73] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.347461][ T73] Call Trace: [ 32.347561][ T73] [ 32.347633][ T73] dump_stack_lvl (lib/dump_stack.c:117) [ 32.347767][ T73] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 32.347908][ T73] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.348197][ T73] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 32.348363][ T73] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 32.348494][ T73] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.348595][ T73] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 32.348815][ T73] check_irq_usage (kernel/locking/lockdep.c:2871) [ 32.348949][ T73] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 32.349080][ T73] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.349179][ T73] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 32.349312][ T73] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 32.349521][ T73] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 32.349655][ T73] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 32.349799][ T73] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 32.349987][ T73] check_prev_add (kernel/locking/lockdep.c:3138) [ 32.350197][ T73] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 32.350329][ T73] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 32.350460][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.350563][ T73] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.350694][ 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) [ 32.350928][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.351053][ T73] __lock_acquire (kernel/locking/lockdep.c:5137) [ 32.351189][ T73] ? xt_check_target (net/netfilter/x_tables.c:1022 (discriminator 1)) [ 32.351329][ T73] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 32.351473][ T73] ? __get_task_comm (fs/exec.c:1234) [ 32.351608][ T73] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.351719][ T73] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 32.351865][ T73] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.352020][ T73] ? __get_task_comm (fs/exec.c:1234) [ 32.352159][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.352290][ T73] ? __get_task_comm (fs/exec.c:1234) [ 32.352450][ T73] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 32.352582][ T73] ? __get_task_comm (fs/exec.c:1234) [ 32.352805][ T73] __get_task_comm (fs/exec.c:1234) [ 32.352961][ T73] ref_tracker_alloc (lib/ref_tracker.c:217) [ 32.353108][ T73] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 32.353239][ T73] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.353458][ T73] ? netdev_get_by_index (net/core/dev.c:914) [ 32.353602][ T73] ? fib6_nh_init (net/ipv6/route.c:3541) [ 32.353733][ T73] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 32.353870][ T73] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.354077][ T73] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.354210][ T73] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.354341][ T73] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.354474][ T73] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.354606][ T73] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.354820][ T73] ? process_one_work (kernel/workqueue.c:3254) [ 32.354979][ T73] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.355110][ T73] ? kthread (kernel/kthread.c:388) [ 32.355210][ T73] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 32.355421][ T73] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 32.355554][ T73] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.355686][ T73] netdev_get_by_index (net/core/dev.c:914) [ 32.355845][ T73] fib6_nh_init (net/ipv6/route.c:3541) [ 32.356087][ T73] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 32.356253][ T73] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 32.356386][ T73] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 32.356519][ T73] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 32.356728][ T73] ? __kmalloc (mm/slub.c:3980) [ 32.356865][ T73] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 32.356998][ T73] ip6_route_info_create (net/ipv6/route.c:3808) [ 32.357139][ T73] ? __lock_release (kernel/locking/lockdep.c:5430) [ 32.357272][ T73] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 32.357514][ T73] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 32.357646][ T73] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.357777][ T73] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 32.357921][ 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) [ 32.358128][ T73] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 32.358258][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.358396][ T73] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.358529][ T73] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.358822][ T73] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.358954][ T73] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 32.359086][ T73] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 32.359250][ T73] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.359461][ T73] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 32.359593][ T73] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 32.359727][ T73] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 32.359864][ T73] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.360071][ T73] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.360202][ 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) [ 32.360335][ T73] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 32.360498][ T73] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.360706][ T73] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.360868][ T73] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.361005][ T73] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 32.361136][ T73] ? process_one_work (kernel/workqueue.c:3230) [ 32.361352][ T73] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.361483][ T73] ? process_one_work (kernel/workqueue.c:3230) [ 32.361625][ T73] process_one_work (kernel/workqueue.c:3254) [ 32.361759][ T73] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 32.361909][ T73] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 32.362129][ T73] ? assign_work (kernel/workqueue.c:1209) [ 32.362265][ T73] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.362459][ T73] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 32.362703][ T73] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.363044][ T73] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.363246][ T73] kthread (kernel/kthread.c:388) [ 32.363405][ T73] ? __pfx_kthread (kernel/kthread.c:341) [ 32.363619][ T73] ret_from_fork (arch/x86/kernel/process.c:147) [ 32.363830][ T73] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage