====================================== | [ 166.149888][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 166.150021][ T72] | [ 166.150170][ T72] | [ 166.150170][ T72] stack backtrace: [ 166.150536][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 166.150918][ T72] Workqueue: ipv6_addrconf addrconf_dad_work [ 166.151093][ T72] Call Trace: [ 166.151198][ T72] [ 166.151270][ T72] dump_stack_lvl (lib/dump_stack.c:117) [ 166.151483][ T72] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 166.151627][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 166.151764][ T72] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 166.151933][ T72] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 166.152144][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 166.152244][ T72] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 166.152378][ T72] check_irq_usage (kernel/locking/lockdep.c:2871) [ 166.152516][ T72] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 166.152650][ T72] ? __bfs (kernel/locking/lockdep.c:1787) [ 166.152826][ T72] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 166.152965][ T72] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 166.153103][ T72] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 166.153237][ T72] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 166.153451][ T72] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 166.153591][ T72] check_prev_add (kernel/locking/lockdep.c:3138) [ 166.153728][ T72] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 166.153861][ T72] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 166.153996][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 166.154173][ T72] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 166.154306][ T72] ? 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) [ 166.154446][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 166.154549][ T72] __lock_acquire (kernel/locking/lockdep.c:5137) [ 166.154762][ T72] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 166.154896][ T72] ? __get_task_comm (fs/exec.c:1234) [ 166.155030][ T72] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 166.155131][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 166.155266][ T72] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 166.155479][ T72] ? __get_task_comm (fs/exec.c:1234) [ 166.155622][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 166.155756][ T72] ? __get_task_comm (fs/exec.c:1234) [ 166.155891][ T72] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 166.156175][ T72] ? __get_task_comm (fs/exec.c:1234) [ 166.156307][ T72] __get_task_comm (fs/exec.c:1234) [ 166.156444][ T72] ref_tracker_alloc (lib/ref_tracker.c:217) [ 166.156578][ T72] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 166.156789][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 166.156922][ T72] ? netdev_get_by_index (net/core/dev.c:914) [ 166.157057][ T72] ? fib6_nh_init (net/ipv6/route.c:3541) [ 166.157189][ T72] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 166.157325][ T72] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 166.157532][ T72] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 166.157665][ T72] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 166.157798][ T72] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 166.157930][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 166.158143][ T72] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 166.158274][ T72] ? 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) [ 166.158408][ T72] ? process_one_work (kernel/workqueue.c:3254) [ 166.158541][ T72] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 166.158761][ T72] ? kthread (kernel/kthread.c:388) [ 166.158861][ T72] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 166.158994][ T72] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 166.159127][ T72] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 166.159270][ T72] netdev_get_by_index (net/core/dev.c:914) [ 166.159406][ T72] fib6_nh_init (net/ipv6/route.c:3541) [ 166.159538][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 166.159705][ T72] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 166.159839][ T72] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 166.160050][ T72] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 166.160186][ T72] ? __kmalloc (mm/slub.c:3980) [ 166.160319][ T72] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 166.160454][ T72] ip6_route_info_create (net/ipv6/route.c:3808) [ 166.160667][ T72] ? __lock_release (kernel/locking/lockdep.c:5430) [ 166.160809][ T72] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 166.160974][ T72] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 166.161114][ T72] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 166.161324][ T72] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 166.161460][ T72] ? 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) [ 166.161592][ T72] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 166.161725][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 166.161940][ T72] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 166.162077][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 166.162211][ T72] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 166.162342][ T72] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 166.162551][ T72] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 166.162718][ T72] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 166.162853][ T72] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 166.162990][ T72] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 166.163202][ T72] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 166.163336][ T72] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 166.163468][ T72] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 166.163600][ T72] ? 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) [ 166.163733][ T72] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 166.163975][ T72] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 166.164110][ T72] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 166.164241][ T72] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 166.164378][ T72] ? 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) [ 166.164587][ T72] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 166.164721][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 166.164890][ T72] 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) [ 166.165023][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 166.165233][ T72] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 166.165365][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 166.165501][ T72] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 166.165634][ T72] ? process_one_work (kernel/workqueue.c:3230) [ 166.165844][ T72] process_one_work (kernel/workqueue.c:3254) [ 166.165982][ T72] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 166.166128][ T72] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 166.166263][ T72] ? assign_work (kernel/workqueue.c:1209) [ 166.166548][ T72] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 166.166681][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 166.166852][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 166.166988][ T72] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 166.167196][ T72] kthread (kernel/kthread.c:388) [ 166.167297][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 166.167429][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 166.167562][ T72] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage