====================================== | [ 32.859788][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 32.859923][ T10] | [ 32.859991][ T10] | [ 32.859991][ T10] stack backtrace: [ 32.860435][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.860734][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.860985][ T10] Call Trace: [ 32.861092][ T10] [ 32.861163][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 32.861299][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 32.861511][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.861650][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 32.861815][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 32.861948][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.862049][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 32.862260][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 32.862398][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 32.862533][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.862634][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 32.862846][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 32.862978][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 32.863111][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 32.863248][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 32.863466][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 32.863602][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 32.863735][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 32.863869][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.863970][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.864107][ 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) [ 32.864244][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.864346][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 32.864485][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 32.864696][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.864831][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.864933][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 32.865066][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.865198][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.865409][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.865540][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.865673][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 32.865805][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.865945][ T10] __get_task_comm (fs/exec.c:1234) [ 32.866077][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 32.866213][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 32.866345][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.866477][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 32.866608][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 32.866739][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 32.866870][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.867005][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.867220][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.867352][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.867483][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.867614][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.867824][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 32.867955][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.868091][ T10] ? kthread (kernel/kthread.c:388) [ 32.868191][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 32.868483][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 32.868615][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.868748][ T10] netdev_get_by_index (net/core/dev.c:914) [ 32.868879][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 32.869015][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 32.869179][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 32.869328][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 32.869468][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 32.869600][ T10] ? __kmalloc (mm/slub.c:3980) [ 32.869735][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 32.869871][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 32.870002][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 32.870135][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 32.870377][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 32.870512][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.870647][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 32.870785][ 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) [ 32.870993][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 32.871124][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.871257][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.871389][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.871602][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.871734][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 32.871870][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 32.872068][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.872280][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 32.872414][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 32.872547][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 32.872680][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.872892][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.873023][ 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) [ 32.873157][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 32.873321][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.873534][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.873664][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.873799][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 32.873930][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.874061][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.874270][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.874408][ T10] process_one_work (kernel/workqueue.c:3254) [ 32.874541][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 32.874675][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 32.874886][ T10] ? assign_work (kernel/workqueue.c:1209) [ 32.875018][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.875152][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.875283][ T10] kthread (kernel/kthread.c:388) [ 32.875463][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 32.875600][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 32.875732][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage