====================================== | [ 31.130136][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 31.130269][ T72] | [ 31.130337][ T72] | [ 31.130337][ T72] stack backtrace: [ 31.130712][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 31.131035][ T72] Workqueue: ipv6_addrconf addrconf_dad_work [ 31.131212][ T72] Call Trace: [ 31.131314][ T72] [ 31.131387][ T72] dump_stack_lvl (lib/dump_stack.c:117) [ 31.131532][ T72] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 31.131665][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 31.131799][ T72] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 31.131972][ T72] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 31.132103][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 31.132206][ T72] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 31.132347][ T72] check_irq_usage (kernel/locking/lockdep.c:2871) [ 31.132488][ T72] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 31.132622][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 31.132721][ T72] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 31.132866][ T72] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 31.133005][ T72] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 31.133141][ T72] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 31.133282][ T72] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 31.133428][ T72] check_prev_add (kernel/locking/lockdep.c:3138) [ 31.133560][ T72] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 31.133702][ T72] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 31.133835][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.133940][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 31.134071][ 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) [ 31.134215][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.134318][ T72] __lock_acquire (kernel/locking/lockdep.c:5137) [ 31.134453][ T72] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 31.134588][ T72] ? __get_task_comm (fs/exec.c:1234) [ 31.134724][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 31.134825][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 31.134969][ T72] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 31.135100][ T72] ? __get_task_comm (fs/exec.c:1234) [ 31.135238][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.135372][ T72] ? __get_task_comm (fs/exec.c:1234) [ 31.135513][ T72] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 31.135644][ T72] ? __get_task_comm (fs/exec.c:1234) [ 31.135782][ T72] __get_task_comm (fs/exec.c:1234) [ 31.135932][ T72] ref_tracker_alloc (lib/ref_tracker.c:217) [ 31.136067][ T72] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 31.136198][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 31.136329][ T72] ? netdev_get_by_index (net/core/dev.c:914) [ 31.136461][ T72] ? fib6_nh_init (net/ipv6/route.c:3541) [ 31.136602][ T72] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 31.136742][ T72] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 31.136873][ T72] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 31.137004][ T72] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 31.137135][ T72] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 31.137269][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.137400][ T72] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.137536][ T72] ? process_one_work (kernel/workqueue.c:3254) [ 31.137668][ T72] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 31.137801][ T72] ? kthread (kernel/kthread.c:388) [ 31.137901][ T72] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 31.138032][ T72] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 31.138164][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 31.138299][ T72] netdev_get_by_index (net/core/dev.c:914) [ 31.138438][ T72] fib6_nh_init (net/ipv6/route.c:3541) [ 31.138574][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 31.138739][ T72] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 31.138871][ T72] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 31.139007][ T72] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 31.139138][ T72] ? __kmalloc (mm/slub.c:3980) [ 31.139274][ T72] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 31.139406][ T72] ip6_route_info_create (net/ipv6/route.c:3808) [ 31.139542][ T72] ? __lock_release (kernel/locking/lockdep.c:5430) [ 31.139679][ T72] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 31.139845][ T72] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 31.139979][ T72] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 31.140115][ T72] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 31.140251][ 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) [ 31.140382][ T72] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 31.140511][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.140645][ T72] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 31.140778][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 31.140914][ T72] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 31.141043][ T72] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 31.141176][ T72] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 31.141340][ T72] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 31.141471][ T72] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 31.141605][ T72] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 31.141825][ T72] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 31.141960][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.142104][ T72] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 31.142315][ 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) [ 31.142530][ T72] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 31.142747][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 31.142887][ T72] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.143016][ T72] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 31.143164][ T72] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 31.143300][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 31.143431][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 31.143562][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 31.143703][ T72] process_one_work (kernel/workqueue.c:3254) [ 31.143914][ T72] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 31.144055][ T72] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 31.144193][ T72] ? assign_work (kernel/workqueue.c:1209) [ 31.144325][ T72] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 31.144535][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 31.144702][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 31.144833][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 31.144963][ T72] kthread (kernel/kthread.c:388) [ 31.145148][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 31.145285][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 31.145416][ T72] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage