====================================== | [ 52.638520][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 52.638731][ T10] | [ 52.638983][ T10] | [ 52.638983][ T10] stack backtrace: [ 52.639588][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 52.640222][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 52.640497][ T10] Call Trace: [ 52.640661][ T10] [ 52.640776][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 52.641003][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 52.641212][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 52.641433][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 52.641694][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 52.641922][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 52.642086][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 52.642303][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 52.642516][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 52.642745][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 52.642901][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 52.643127][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 52.643342][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 52.643569][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 52.643786][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 52.644002][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 52.644213][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 52.644430][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 52.644654][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.645109][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 52.645329][ 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) [ 52.645543][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.645705][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 52.645922][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 52.646135][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.646351][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 52.646516][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 52.646732][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 52.646954][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.647167][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.647377][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.647599][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 52.647812][ T10] ? __get_task_comm (fs/exec.c:1234) [ 52.648028][ T10] __get_task_comm (fs/exec.c:1234) [ 52.648250][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 52.648469][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 52.648831][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 52.649059][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 52.649277][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 52.649498][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 52.649713][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 52.650065][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 52.650285][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 52.650497][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 52.650718][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.651067][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.651293][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 52.651503][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 52.651724][ T10] ? kthread (kernel/kthread.c:388) [ 52.651882][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 52.652088][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 52.652300][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 52.652506][ T10] netdev_get_by_index (net/core/dev.c:914) [ 52.652729][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 52.652948][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 52.653218][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 52.653423][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 52.653631][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 52.653834][ T10] ? __kmalloc (mm/slub.c:3980) [ 52.654040][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 52.654248][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 52.654454][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 52.654798][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 52.655061][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 52.655268][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 52.655475][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 52.655832][ 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) [ 52.656046][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 52.656260][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.656466][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 52.656802][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 52.657016][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 52.657220][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 52.657422][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 52.657809][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 52.658012][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 52.658230][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 52.658437][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 52.658774][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.658984][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 52.659193][ 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) [ 52.659410][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 52.659809][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 52.660026][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.660239][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 52.660455][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 52.660676][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 52.661179][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 52.661392][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 52.661611][ T10] process_one_work (kernel/workqueue.c:3254) [ 52.661841][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 52.662063][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 52.662290][ T10] ? assign_work (kernel/workqueue.c:1209) [ 52.662505][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 52.662729][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 52.662944][ T10] kthread (kernel/kthread.c:388) [ 52.663107][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 52.663322][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 52.663538][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage