====================================== | [ 35.266926][ T75] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 35.267134][ T75] | [ 35.267243][ T75] | [ 35.267243][ T75] stack backtrace: [ 35.267993][ T75] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 35.268474][ T75] Workqueue: ipv6_addrconf addrconf_dad_work [ 35.269026][ T75] Call Trace: [ 35.269137][ T75] <TASK> [ 35.269212][ T75] dump_stack_lvl (lib/dump_stack.c:117) [ 35.269363][ T75] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 35.269503][ T75] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.269729][ T75] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 35.269917][ T75] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 35.270070][ T75] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.270181][ T75] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 35.270416][ T75] check_irq_usage (kernel/locking/lockdep.c:2871) [ 35.270561][ T75] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 35.270708][ T75] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.270820][ T75] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 35.270974][ T75] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 35.271123][ T75] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 35.271280][ T75] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 35.271519][ T75] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 35.271655][ T75] check_prev_add (kernel/locking/lockdep.c:3138) [ 35.271796][ T75] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 35.271948][ T75] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 35.272087][ T75] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.272189][ T75] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.272416][ T75] ? 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) [ 35.272558][ T75] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.272663][ T75] __lock_acquire (kernel/locking/lockdep.c:5137) [ 35.272847][ T75] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 35.272998][ T75] ? __get_task_comm (fs/exec.c:1234) [ 35.273143][ T75] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.273245][ T75] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 35.273385][ T75] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 35.273543][ T75] ? __get_task_comm (fs/exec.c:1234) [ 35.273778][ T75] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.273932][ T75] ? __get_task_comm (fs/exec.c:1234) [ 35.274068][ T75] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 35.274204][ T75] ? __get_task_comm (fs/exec.c:1234) [ 35.274349][ T75] __get_task_comm (fs/exec.c:1234) [ 35.274592][ T75] ref_tracker_alloc (lib/ref_tracker.c:217) [ 35.274869][ T75] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 35.275008][ T75] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.275164][ T75] ? netdev_get_by_index (net/core/dev.c:914) [ 35.275392][ T75] ? fib6_nh_init (net/ipv6/route.c:3541) [ 35.275534][ T75] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 35.275670][ T75] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.275810][ T75] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.275956][ T75] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.276188][ T75] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.276330][ T75] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.276482][ T75] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.276629][ T75] ? process_one_work (kernel/workqueue.c:3254) [ 35.276873][ T75] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.277039][ T75] ? kthread (kernel/kthread.c:388) [ 35.277149][ T75] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 35.277311][ T75] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 35.277476][ T75] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.277683][ T75] netdev_get_by_index (net/core/dev.c:914) [ 35.278010][ T75] fib6_nh_init (net/ipv6/route.c:3541) [ 35.278394][ T75] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 35.278681][ T75] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 35.278900][ T75] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 35.279115][ T75] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 35.279473][ T75] ? __kmalloc (mm/slub.c:3980) [ 35.279708][ T75] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 35.279920][ T75] ip6_route_info_create (net/ipv6/route.c:3808) [ 35.280240][ T75] ? __lock_release (kernel/locking/lockdep.c:5430) [ 35.280383][ T75] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 35.280569][ T75] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 35.280720][ T75] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.280891][ T75] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 35.281140][ T75] ? 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) [ 35.281364][ T75] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 35.281588][ T75] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.281768][ T75] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.281930][ T75] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.282076][ T75] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.282213][ T75] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 35.282355][ T75] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 35.282538][ T75] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.282681][ T75] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 35.282814][ T75] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 35.282958][ T75] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 35.283103][ T75] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.283239][ T75] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.283381][ T75] ? 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) [ 35.283519][ T75] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 35.283694][ T75] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.283839][ T75] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.283987][ T75] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.284122][ T75] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 35.284301][ T75] ? process_one_work (kernel/workqueue.c:3230) [ 35.284496][ T75] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.284721][ T75] ? process_one_work (kernel/workqueue.c:3230) [ 35.284934][ T75] process_one_work (kernel/workqueue.c:3254) [ 35.285154][ T75] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 35.285318][ T75] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 35.285546][ T75] ? assign_work (kernel/workqueue.c:1209) [ 35.285745][ T75] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.285927][ T75] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 35.286205][ T75] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 35.286392][ T75] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 35.286610][ T75] kthread (kernel/kthread.c:388) [ 35.286747][ T75] ? __pfx_kthread (kernel/kthread.c:341) [ 35.286963][ T75] ret_from_fork (arch/x86/kernel/process.c:147) [ 35.287177][ T75] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage