====================================== | [ 101.565092][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 101.565318][ T10] | [ 101.565431][ T10] | [ 101.565431][ T10] stack backtrace: [ 101.566158][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 101.566761][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 101.567029][ T10] Call Trace: [ 101.567163][ T10] [ 101.567239][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 101.567378][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 101.567653][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 101.567787][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 101.567951][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 101.568084][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 101.568259][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 101.568390][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 101.568530][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 101.568665][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 101.568841][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 101.569013][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 101.569190][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 101.569383][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 101.569589][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 101.570046][ T10] ? stack_depot_save_flags (lib/stackdepot.c:671) [ 101.570247][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 101.570430][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 101.570632][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 101.570947][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 101.571080][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 101.571240][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 101.571393][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 101.571701][ 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) [ 101.571910][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 101.572057][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 101.572261][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 101.572462][ T10] ? __get_task_comm (fs/exec.c:1234) [ 101.572795][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 101.572945][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 101.573145][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 101.573349][ T10] ? __get_task_comm (fs/exec.c:1234) [ 101.573675][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 101.573884][ T10] ? __get_task_comm (fs/exec.c:1234) [ 101.574088][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 101.574285][ T10] ? __get_task_comm (fs/exec.c:1234) [ 101.574473][ T10] __get_task_comm (fs/exec.c:1234) [ 101.574801][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 101.575005][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 101.575203][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 101.575404][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 101.575732][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 101.575946][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 101.576146][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 101.576347][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 101.576673][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 101.576871][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 101.577060][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 101.577211][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 101.577480][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 101.577635][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 101.577766][ T10] ? kthread (kernel/kthread.c:388) [ 101.577870][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 101.578001][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 101.578209][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 101.578341][ T10] netdev_get_by_index (net/core/dev.c:914) [ 101.578471][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 101.578602][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 101.578875][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 101.579063][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 101.579267][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 101.579473][ T10] ? __kmalloc (mm/slub.c:3980) [ 101.579812][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 101.580011][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 101.580218][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 101.580409][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 101.580816][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 101.580955][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 101.581095][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 101.581317][ 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) [ 101.581635][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 101.581843][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 101.582063][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 101.582273][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 101.582494][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 101.582841][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 101.583050][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 101.583322][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 101.583532][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 101.583879][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 101.584087][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 101.584303][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 101.584550][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 101.585021][ 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) [ 101.585230][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 101.585489][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 101.585696][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 101.586033][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 101.586218][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 101.586356][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 101.586502][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 101.586780][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 101.586913][ T10] process_one_work (kernel/workqueue.c:3254) [ 101.587046][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 101.587178][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 101.587387][ T10] ? assign_work (kernel/workqueue.c:1209) [ 101.587520][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 101.587660][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 101.587793][ T10] kthread (kernel/kthread.c:388) [ 101.587894][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 101.588104][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 101.588271][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage