====================================== | [ 53.555687][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 53.555817][ T10] | [ 53.555883][ T10] | [ 53.555883][ T10] stack backtrace: [ 53.556314][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 53.556602][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 53.556848][ T10] Call Trace: [ 53.556956][ T10] [ 53.557032][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 53.557177][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 53.557321][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 53.557530][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 53.557692][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 53.557828][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 53.557927][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 53.558134][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 53.558270][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 53.558404][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 53.558512][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 53.558731][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 53.558870][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 53.559003][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 53.559144][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 53.559279][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 53.559486][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 53.559616][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 53.559751][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.559852][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 53.560081][ 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) [ 53.560223][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.560327][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 53.560459][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 53.560590][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.560801][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 53.560900][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 53.561030][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 53.561161][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.561366][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.561496][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.561628][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 53.561761][ T10] ? __get_task_comm (fs/exec.c:1234) [ 53.561966][ T10] __get_task_comm (fs/exec.c:1234) [ 53.562096][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 53.562231][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 53.562361][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 53.562493][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 53.562701][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 53.562833][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 53.562962][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 53.563092][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 53.563298][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 53.563428][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 53.563561][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.563690][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.563897][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 53.564050][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 53.564181][ T10] ? kthread (kernel/kthread.c:388) [ 53.564293][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 53.564425][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 53.564635][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 53.564771][ T10] netdev_get_by_index (net/core/dev.c:914) [ 53.564912][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 53.565041][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 53.565358][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 53.565488][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 53.565622][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 53.565752][ T10] ? __kmalloc (mm/slub.c:3980) [ 53.565958][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 53.566088][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 53.566220][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 53.566351][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 53.566592][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 53.566723][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 53.566854][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 53.566988][ 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) [ 53.567194][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 53.567328][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.567462][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 53.567592][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 53.567801][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 53.567931][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 53.568082][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 53.568251][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 53.568463][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 53.568595][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 53.568728][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 53.568861][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.568992][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 53.569198][ 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) [ 53.569329][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 53.569490][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 53.569621][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.569827][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 53.569956][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 53.570086][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 53.570219][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 53.570425][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 53.570557][ T10] process_one_work (kernel/workqueue.c:3254) [ 53.570690][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 53.570821][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 53.571029][ T10] ? assign_work (kernel/workqueue.c:1209) [ 53.571162][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 53.571298][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 53.571432][ T10] kthread (kernel/kthread.c:388) [ 53.571531][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 53.571737][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 53.571867][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage