====================================== | [ 33.590723][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 33.590934][ T72] | [ 33.591003][ T72] | [ 33.591003][ T72] stack backtrace: [ 33.591371][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 33.591742][ T72] Workqueue: ipv6_addrconf addrconf_dad_work [ 33.591919][ T72] Call Trace: [ 33.592018][ T72] [ 33.592093][ T72] dump_stack_lvl (lib/dump_stack.c:117) [ 33.592383][ T72] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 33.592515][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 33.592647][ T72] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 33.592814][ T72] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 33.593022][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.593123][ T72] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 33.593257][ T72] check_irq_usage (kernel/locking/lockdep.c:2871) [ 33.593391][ T72] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 33.593608][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 33.593711][ T72] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 33.593843][ T72] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 33.593973][ T72] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 33.594108][ T72] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 33.594323][ T72] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 33.594454][ T72] check_prev_add (kernel/locking/lockdep.c:3138) [ 33.594585][ T72] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 33.594717][ T72] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 33.594941][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.595044][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 33.595174][ T72] ? 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) [ 33.595304][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.595404][ T72] __lock_acquire (kernel/locking/lockdep.c:5137) [ 33.595541][ T72] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 33.595672][ T72] ? __get_task_comm (fs/exec.c:1234) [ 33.595814][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 33.595917][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 33.596048][ T72] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 33.596179][ T72] ? __get_task_comm (fs/exec.c:1234) [ 33.596308][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.596438][ T72] ? __get_task_comm (fs/exec.c:1234) [ 33.596571][ T72] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 33.596708][ T72] ? __get_task_comm (fs/exec.c:1234) [ 33.596838][ T72] __get_task_comm (fs/exec.c:1234) [ 33.596968][ T72] ref_tracker_alloc (lib/ref_tracker.c:217) [ 33.597099][ T72] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 33.597304][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.597433][ T72] ? netdev_get_by_index (net/core/dev.c:914) [ 33.597562][ T72] ? fib6_nh_init (net/ipv6/route.c:3541) [ 33.597694][ T72] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 33.597937][ T72] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.598067][ T72] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.598197][ T72] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.598327][ T72] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.598458][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.598591][ T72] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.598720][ T72] ? process_one_work (kernel/workqueue.c:3254) [ 33.598855][ T72] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.598986][ T72] ? kthread (kernel/kthread.c:388) [ 33.599083][ T72] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 33.599220][ T72] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 33.599354][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 33.599484][ T72] netdev_get_by_index (net/core/dev.c:914) [ 33.599615][ T72] fib6_nh_init (net/ipv6/route.c:3541) [ 33.599744][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 33.599909][ T72] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 33.600043][ T72] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 33.600255][ T72] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 33.600386][ T72] ? __kmalloc (mm/slub.c:3980) [ 33.600518][ T72] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 33.600649][ T72] ip6_route_info_create (net/ipv6/route.c:3808) [ 33.600878][ T72] ? __lock_release (kernel/locking/lockdep.c:5430) [ 33.601010][ T72] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 33.601175][ T72] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 33.601310][ T72] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 33.601443][ T72] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 33.601585][ T72] ? 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) [ 33.601720][ T72] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 33.601852][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.601985][ T72] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 33.602121][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.602253][ T72] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 33.602386][ T72] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 33.602517][ T72] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 33.602759][ T72] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 33.602891][ T72] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 33.603025][ T72] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 33.603157][ T72] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 33.603370][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.603500][ T72] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 33.603634][ T72] ? 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) [ 33.603770][ T72] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 33.604012][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 33.604144][ T72] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.604273][ T72] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 33.604404][ T72] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 33.604612][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 33.604742][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 33.604886][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 33.605018][ T72] process_one_work (kernel/workqueue.c:3254) [ 33.605226][ T72] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 33.605357][ T72] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 33.605488][ T72] ? assign_work (kernel/workqueue.c:1209) [ 33.605619][ T72] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 33.605755][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 33.606028][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 33.606161][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 33.606291][ T72] kthread (kernel/kthread.c:388) [ 33.606390][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 33.606521][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 33.606654][ T72] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage