====================================== | [ 53.605195][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 53.605514][ T10] | [ 53.605603][ T10] | [ 53.605603][ T10] stack backtrace: [ 53.606071][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 53.606520][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 53.606728][ T10] Call Trace: [ 53.606849][ T10] [ 53.607018][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 53.607193][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 53.607364][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 53.607529][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 53.607735][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 53.607896][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 53.608018][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 53.608183][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 53.608366][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 53.608531][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 53.608652][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 53.608817][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 53.608981][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 53.609220][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 53.609424][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 53.609589][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 53.609751][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 53.609917][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 53.610168][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.610293][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 53.610475][ 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) [ 53.610637][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.610764][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 53.610928][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 53.611087][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.611252][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.611394][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 53.611559][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 53.611723][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.611883][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.612046][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.612291][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 53.612475][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.612639][ T10] __get_task_comm (fs/exec.c:1234) [ 53.612801][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 53.613060][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 53.613222][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 53.613409][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 53.613573][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 53.613741][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 53.613904][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 53.614084][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 53.614254][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 53.614445][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 53.614611][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.614786][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.614948][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 53.615121][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 53.615462][ T10] ? kthread (kernel/kthread.c:388) [ 53.615601][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 53.615759][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 53.615925][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 53.616076][ T10] netdev_get_by_index (net/core/dev.c:914) [ 53.616328][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 53.616515][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 53.616704][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 53.616869][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 53.617100][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 53.617268][ T10] ? __kmalloc (mm/slub.c:3980) [ 53.617452][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 53.617623][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 53.617864][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 53.618045][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 53.618261][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 53.618437][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 53.618688][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 53.618853][ 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) [ 53.619011][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 53.619172][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.619428][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 53.619583][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 53.619746][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 53.619895][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 53.620137][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 53.620349][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 53.620543][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 53.620694][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 53.620862][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 53.621014][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.621174][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.621346][ 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) [ 53.621517][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 53.621795][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 53.621956][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.622111][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.622281][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 53.622444][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 53.622612][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.622762][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 53.622927][ T10] process_one_work (kernel/workqueue.c:3254) [ 53.623086][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 53.623255][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 53.623416][ T10] ? assign_work (kernel/workqueue.c:1209) [ 53.623589][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 53.623744][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 53.623908][ T10] kthread (kernel/kthread.c:388) [ 53.624024][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 53.624171][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 53.624362][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage