====================================== | [ 52.540681][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 52.540890][ T10] | [ 52.540958][ T10] | [ 52.540958][ T10] stack backtrace: [ 52.541328][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 52.541700][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 52.541874][ T10] Call Trace: [ 52.541975][ T10] [ 52.542130][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 52.542270][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 52.542405][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 52.542541][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 52.542705][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 52.542838][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 52.542939][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 52.543081][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 52.543215][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 52.543354][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 52.543454][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 52.543589][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 52.543720][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 52.544004][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 52.544146][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 52.544280][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 52.544411][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 52.544542][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 52.544754][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.544854][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 52.544985][ 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) [ 52.545131][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.545309][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 52.545449][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 52.545581][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.545713][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.545812][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 52.546019][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 52.546152][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.546283][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.546413][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.546624][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 52.546763][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.546894][ T10] __get_task_comm (fs/exec.c:1234) [ 52.547025][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 52.547237][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 52.547369][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 52.547499][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 52.547631][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 52.547763][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 52.547973][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 52.548104][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 52.548235][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 52.548366][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 52.548576][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.548706][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.548836][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 52.548971][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 52.549179][ T10] ? kthread (kernel/kthread.c:388) [ 52.549279][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 52.549411][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 52.549545][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 52.549678][ T10] netdev_get_by_index (net/core/dev.c:914) [ 52.549886][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 52.550018][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 52.550183][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 52.550318][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 52.550529][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 52.550663][ T10] ? __kmalloc (mm/slub.c:3980) [ 52.550796][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 52.550928][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 52.551153][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 52.551289][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 52.551454][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 52.551587][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 52.551720][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 52.551856][ 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) [ 52.551990][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 52.552124][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.552259][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 52.552392][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 52.552526][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 52.552663][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 52.552873][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 52.553039][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 52.553173][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 52.553307][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 52.553518][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 52.553653][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.553784][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.553919][ 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) [ 52.554053][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 52.554319][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 52.554454][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.554586][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.554720][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 52.554852][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 52.554985][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.555132][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 52.555265][ T10] process_one_work (kernel/workqueue.c:3254) [ 52.555481][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 52.555613][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 52.555749][ T10] ? assign_work (kernel/workqueue.c:1209) [ 52.555882][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 52.556103][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 52.556235][ T10] kthread (kernel/kthread.c:388) [ 52.556339][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 52.556471][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 52.556605][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage