====================================== | [ 80.875200][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 80.875334][ T10] | [ 80.875405][ T10] | [ 80.875405][ T10] stack backtrace: [ 80.875854][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 80.876155][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 80.876332][ T10] Call Trace: [ 80.876519][ T10] [ 80.876589][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 80.876730][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 80.876869][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 80.877004][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 80.877245][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 80.877378][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 80.877480][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 80.877616][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 80.877828][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 80.877962][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 80.878066][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 80.878201][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 80.878411][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 80.878545][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 80.878685][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 80.878818][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 80.878952][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 80.879161][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 80.879298][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 80.879400][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 80.879535][ 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) [ 80.879756][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 80.879858][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 80.879994][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 80.880128][ T10] ? __get_task_comm (fs/exec.c:1234) [ 80.880261][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 80.880363][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 80.880503][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 80.880636][ T10] ? __get_task_comm (fs/exec.c:1234) [ 80.880772][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 80.880914][ T10] ? __get_task_comm (fs/exec.c:1234) [ 80.881048][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 80.881181][ T10] ? __get_task_comm (fs/exec.c:1234) [ 80.881316][ T10] __get_task_comm (fs/exec.c:1234) [ 80.881525][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 80.881659][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 80.881795][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 80.881927][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 80.882060][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 80.882343][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 80.882479][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 80.882612][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 80.882746][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 80.882957][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 80.883095][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 80.883227][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 80.883367][ 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) [ 80.883576][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 80.883709][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 80.883845][ T10] ? kthread (kernel/kthread.c:388) [ 80.883953][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 80.884091][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 80.884302][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 80.884437][ T10] netdev_get_by_index (net/core/dev.c:914) [ 80.884570][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 80.884705][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 80.884948][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 80.885080][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 80.885219][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 80.885357][ T10] ? __kmalloc (mm/slub.c:3980) [ 80.885569][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 80.885704][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 80.885838][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 80.885973][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 80.886218][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 80.886360][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 80.886493][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 80.886633][ 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) [ 80.886843][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 80.886975][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 80.887109][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 80.887250][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 80.887461][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 80.887595][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 80.887728][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 80.887897][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 80.888111][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 80.888250][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 80.888384][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 80.888518][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 80.888654][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 80.888864][ 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) [ 80.888997][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 80.889168][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 80.889306][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 80.889513][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 80.889646][ 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) [ 80.889779][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 80.889912][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 80.890159][ 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) [ 80.890293][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 80.890432][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 80.890564][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 80.890791][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 80.890925][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 80.891062][ T10] process_one_work (kernel/workqueue.c:3254) [ 80.891197][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 80.891331][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 80.891470][ T10] ? assign_work (kernel/workqueue.c:1209) [ 80.891605][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 80.891740][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 80.891879][ T10] kthread (kernel/kthread.c:388) [ 80.891981][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 80.892116][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 80.892250][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage