====================================== | [ 37.106424][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 37.106577][ T10] | [ 37.106654][ T10] | [ 37.106654][ T10] stack backtrace: [ 37.107156][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 37.107635][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 37.107854][ T10] Call Trace: [ 37.108014][ T10] [ 37.108127][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 37.108332][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 37.108550][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 37.108772][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 37.109040][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 37.109253][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 37.109411][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 37.109631][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 37.109844][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 37.110050][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 37.110204][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 37.110428][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 37.110648][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 37.110860][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 37.111084][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 37.111279][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 37.111476][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 37.111689][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 37.111900][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 37.112058][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 37.112271][ 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) [ 37.112495][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 37.112654][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 37.112872][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 37.113077][ T10] ? __get_task_comm (fs/exec.c:1234) [ 37.113298][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 37.113457][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 37.113672][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 37.113896][ T10] ? __get_task_comm (fs/exec.c:1234) [ 37.114100][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 37.114325][ T10] ? __get_task_comm (fs/exec.c:1234) [ 37.114575][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 37.114795][ T10] ? __get_task_comm (fs/exec.c:1234) [ 37.114984][ T10] __get_task_comm (fs/exec.c:1234) [ 37.115287][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 37.115539][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 37.115750][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 37.115950][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 37.116157][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 37.116432][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 37.116644][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 37.116968][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 37.117158][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 37.117359][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 37.117558][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 37.117757][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 37.117958][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 37.118261][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 37.118482][ T10] ? kthread (kernel/kthread.c:388) [ 37.118610][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 37.118807][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 37.119136][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 37.119490][ T10] netdev_get_by_index (net/core/dev.c:914) [ 37.119830][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 37.120037][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 37.120430][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 37.120640][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 37.120985][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 37.121334][ T10] ? __kmalloc (mm/slub.c:3980) [ 37.121550][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 37.121900][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 37.122370][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 37.122597][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 37.123044][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 37.123268][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 37.123509][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 37.123738][ 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) [ 37.123950][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 37.124301][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 37.124649][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 37.124858][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 37.125060][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 37.125388][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 37.125583][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 37.125765][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 37.126037][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 37.126195][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 37.126505][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 37.126698][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 37.126836][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 37.126977][ 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) [ 37.127233][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 37.127485][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 37.127734][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 37.127972][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 37.128117][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 37.128265][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 37.128615][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 37.128820][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 37.129043][ T10] process_one_work (kernel/workqueue.c:3254) [ 37.129263][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 37.129616][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 37.129836][ T10] ? assign_work (kernel/workqueue.c:1209) [ 37.130193][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 37.130419][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 37.130635][ T10] kthread (kernel/kthread.c:388) [ 37.130798][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 37.131020][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 37.131380][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage