====================================== | [ 126.109808][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 126.109937][ T10] | [ 126.110013][ T10] | [ 126.110013][ T10] stack backtrace: [ 126.110453][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 126.110742][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 126.110912][ T10] Call Trace: [ 126.111166][ T10] [ 126.111235][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 126.111373][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 126.111509][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 126.111646][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 126.111932][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 126.112066][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 126.112165][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 126.112296][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 126.112505][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 126.112636][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 126.112735][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 126.112870][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 126.113089][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 126.113222][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 126.113358][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 126.113488][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 126.113619][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 126.113830][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 126.113966][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 126.114068][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 126.114199][ 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) [ 126.114404][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 126.114505][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 126.114638][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 126.114769][ T10] ? __get_task_comm (fs/exec.c:1234) [ 126.114903][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 126.115079][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 126.115210][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 126.115362][ T10] ? __get_task_comm (fs/exec.c:1234) [ 126.115492][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 126.115698][ T10] ? __get_task_comm (fs/exec.c:1234) [ 126.115840][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 126.115974][ T10] ? __get_task_comm (fs/exec.c:1234) [ 126.116104][ T10] __get_task_comm (fs/exec.c:1234) [ 126.116311][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 126.116442][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 126.116574][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 126.116706][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 126.116837][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 126.117050][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 126.117180][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 126.117309][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 126.117439][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 126.117570][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 126.117705][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 126.117834][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 126.117967][ T10] ? addrconf_dad_work (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:264 ./include/linux/refcount.h:307 ./include/linux/refcount.h:325 ./include/net/addrconf.h:427 net/ipv6/addrconf.c:4283) [ 126.118097][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 126.118227][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 126.118357][ T10] ? kthread (kernel/kthread.c:388) [ 126.118464][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 126.118595][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 126.118803][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 126.118946][ T10] netdev_get_by_index (net/core/dev.c:914) [ 126.119077][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 126.119206][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 126.119447][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 126.119577][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 126.119708][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 126.119838][ T10] ? __kmalloc (mm/slub.c:3980) [ 126.120049][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 126.120182][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 126.120316][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 126.120448][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 126.120686][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 126.120819][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 126.120952][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 126.121086][ 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) [ 126.121377][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 126.121508][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 126.121643][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 126.121788][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 126.121995][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 126.122126][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 126.122256][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 126.122423][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 126.122631][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 126.122764][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 126.122896][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 126.123027][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 126.123158][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 126.123371][ 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) [ 126.123501][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 126.123667][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 126.123803][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 126.124022][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 126.124152][ 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) [ 126.124290][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 126.124422][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 126.124586][ T10] addrconf_dad_work (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:264 ./include/linux/refcount.h:307 ./include/linux/refcount.h:325 ./include/net/addrconf.h:427 net/ipv6/addrconf.c:4283) [ 126.124716][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 126.124848][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 126.124980][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 126.125112][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 126.125242][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 126.125373][ T10] process_one_work (kernel/workqueue.c:3254) [ 126.125506][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 126.125712][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 126.125845][ T10] ? assign_work (kernel/workqueue.c:1209) [ 126.125981][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 126.126114][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 126.126321][ T10] kthread (kernel/kthread.c:388) [ 126.126419][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 126.126549][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 126.126680][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage