====================================== | [ 76.518060][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 76.518191][ T10] | [ 76.518258][ T10] | [ 76.518258][ T10] stack backtrace: [ 76.518707][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 76.519001][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 76.519248][ T10] Call Trace: [ 76.519359][ T10] [ 76.519429][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 76.519568][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 76.519701][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 76.519916][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 76.520083][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 76.520213][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 76.520314][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 76.520600][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 76.520734][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 76.520867][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 76.520969][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 76.521107][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 76.521317][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 76.521450][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 76.521585][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 76.521716][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 76.521929][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 76.522062][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 76.522196][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 76.522297][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 76.522440][ 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) [ 76.522648][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 76.522750][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 76.522887][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 76.523019][ T10] ? __get_task_comm (fs/exec.c:1234) [ 76.523228][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 76.523329][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 76.523461][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 76.523596][ T10] ? __get_task_comm (fs/exec.c:1234) [ 76.523727][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 76.523942][ T10] ? __get_task_comm (fs/exec.c:1234) [ 76.524075][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 76.524206][ T10] ? __get_task_comm (fs/exec.c:1234) [ 76.524338][ T10] __get_task_comm (fs/exec.c:1234) [ 76.524545][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 76.524681][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 76.524816][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 76.524951][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 76.525173][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 76.525306][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 76.525437][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 76.525569][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 76.525703][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 76.525834][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 76.525966][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 76.526102][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 76.526232][ 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) [ 76.526364][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 76.526497][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 76.526628][ T10] ? kthread (kernel/kthread.c:388) [ 76.526728][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 76.526936][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 76.527069][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 76.527206][ T10] netdev_get_by_index (net/core/dev.c:914) [ 76.527337][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 76.527548][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 76.527713][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 76.527844][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 76.527977][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 76.528187][ T10] ? __kmalloc (mm/slub.c:3980) [ 76.528328][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 76.528468][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 76.528599][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 76.528733][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 76.528974][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 76.529108][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 76.529240][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 76.529379][ 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) [ 76.529587][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 76.529722][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 76.529855][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 76.529987][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 76.530217][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 76.530351][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 76.530483][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 76.530648][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 76.530780][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 76.530918][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 76.531050][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 76.531198][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 76.531408][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 76.531539][ 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) [ 76.531672][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 76.531835][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 76.532045][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 76.532189][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 76.532319][ 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) [ 76.532451][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 76.532661][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 76.532824][ 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) [ 76.532955][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 76.533090][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 76.533303][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 76.533441][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 76.533573][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 76.533706][ T10] process_one_work (kernel/workqueue.c:3254) [ 76.533840][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 76.534053][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 76.534187][ T10] ? assign_work (kernel/workqueue.c:1209) [ 76.534321][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 76.534460][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 76.534668][ T10] kthread (kernel/kthread.c:388) [ 76.534769][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 76.534900][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 76.535035][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage