====================================== | [ 132.489216][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 132.489348][ T10] | [ 132.489419][ T10] | [ 132.489419][ T10] stack backtrace: [ 132.489781][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 132.490072][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 132.490241][ T10] Call Trace: [ 132.490344][ T10] [ 132.490416][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 132.490554][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 132.490687][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 132.490822][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 132.490986][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 132.491118][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 132.491220][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 132.491353][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 132.491565][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 132.491698][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 132.491797][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 132.491929][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 132.492157][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 132.492290][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 132.492426][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 132.492558][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 132.492694][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 132.492826][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 132.492959][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 132.493064][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 132.493204][ 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) [ 132.493336][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 132.493437][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 132.493572][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 132.493705][ T10] ? __get_task_comm (fs/exec.c:1234) [ 132.493843][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 132.493943][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 132.494078][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 132.494210][ T10] ? __get_task_comm (fs/exec.c:1234) [ 132.494341][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 132.494549][ T10] ? __get_task_comm (fs/exec.c:1234) [ 132.494682][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 132.494814][ T10] ? __get_task_comm (fs/exec.c:1234) [ 132.494946][ T10] __get_task_comm (fs/exec.c:1234) [ 132.495169][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 132.495302][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 132.495432][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 132.495563][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 132.495692][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 132.495823][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 132.495954][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 132.496084][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 132.496218][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 132.496349][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 132.496481][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 132.496613][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 132.496743][ T10] ? addrconf_dad_work (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:264 ./include/linux/refcount.h:307 ./include/linux/refcount.h:325 ./include/net/addrconf.h:427 net/ipv6/addrconf.c:4283) [ 132.496949][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 132.497087][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 132.497221][ T10] ? kthread (kernel/kthread.c:388) [ 132.497320][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 132.497530][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 132.497662][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 132.497794][ T10] netdev_get_by_index (net/core/dev.c:914) [ 132.497925][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 132.498056][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 132.498297][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 132.498428][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 132.498566][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 132.498701][ T10] ? __kmalloc (mm/slub.c:3980) [ 132.498911][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 132.499045][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 132.499176][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 132.499309][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 132.499549][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 132.499683][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 132.499818][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 132.499958][ 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) [ 132.500186][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 132.500319][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 132.500452][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 132.500585][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 132.500720][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 132.500852][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 132.500986][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 132.501153][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 132.501288][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 132.501422][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 132.501555][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 132.501686][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 132.501817][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 132.501948][ 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) [ 132.502083][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 132.502248][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 132.502458][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 132.502590][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 132.502721][ 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) [ 132.502853][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 132.502984][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 132.503251][ T10] addrconf_dad_work (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:264 ./include/linux/refcount.h:307 ./include/linux/refcount.h:325 ./include/net/addrconf.h:427 net/ipv6/addrconf.c:4283) [ 132.503382][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 132.503516][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 132.503654][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 132.503786][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 132.503917][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 132.504051][ T10] process_one_work (kernel/workqueue.c:3254) [ 132.504183][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 132.504319][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 132.504456][ T10] ? assign_work (kernel/workqueue.c:1209) [ 132.504589][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 132.504723][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 132.504856][ T10] kthread (kernel/kthread.c:388) [ 132.504956][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 132.505088][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 132.505220][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage