====================================== | [ 100.968735][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 100.968949][ T10] | [ 100.969018][ T10] | [ 100.969018][ T10] stack backtrace: [ 100.969383][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 100.969767][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 100.969941][ T10] Call Trace: [ 100.970043][ T10] [ 100.970196][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 100.970334][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 100.970479][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 100.970616][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 100.970782][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 100.970919][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 100.971019][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 100.971155][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 100.971291][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 100.971504][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 100.971605][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 100.971742][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 100.971876][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 100.972104][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 100.972246][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 100.972383][ T10] ? stack_depot_save_flags (lib/stackdepot.c:671) [ 100.972519][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 100.972656][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 100.972794][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 100.972933][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 100.973067][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 100.973225][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 100.973326][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 100.973461][ 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) [ 100.973600][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 100.973702][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 100.973917][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 100.974052][ T10] ? __get_task_comm (fs/exec.c:1234) [ 100.974186][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 100.974289][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 100.974431][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 100.974652][ T10] ? __get_task_comm (fs/exec.c:1234) [ 100.974786][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 100.974920][ T10] ? __get_task_comm (fs/exec.c:1234) [ 100.975054][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 100.975268][ T10] ? __get_task_comm (fs/exec.c:1234) [ 100.975409][ T10] __get_task_comm (fs/exec.c:1234) [ 100.975546][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 100.975680][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 100.975906][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 100.976049][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 100.976181][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 100.976323][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 100.976456][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 100.976675][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 100.976810][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 100.976950][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 100.977085][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 100.977298][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 100.977431][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 100.977570][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 100.977707][ T10] ? kthread (kernel/kthread.c:388) [ 100.977886][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 100.978021][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 100.978169][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 100.978304][ T10] netdev_get_by_index (net/core/dev.c:914) [ 100.978445][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 100.978656][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 100.978831][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 100.978972][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 100.979107][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 100.979317][ T10] ? __kmalloc (mm/slub.c:3980) [ 100.979458][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 100.979600][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 100.979737][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 100.979956][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 100.980123][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 100.980266][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 100.980400][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 100.980625][ 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) [ 100.980763][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 100.980906][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 100.981042][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 100.981334][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 100.981473][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 100.981607][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 100.981748][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 100.981991][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 100.982125][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 100.982265][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 100.982402][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 100.982614][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 100.982753][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 100.982889][ 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) [ 100.983026][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 100.983270][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 100.983414][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 100.983551][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 100.983693][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 100.983829][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 100.984040][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 100.984185][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 100.984323][ T10] process_one_work (kernel/workqueue.c:3254) [ 100.984465][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 100.984681][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 100.984820][ T10] ? assign_work (kernel/workqueue.c:1209) [ 100.984954][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 100.985098][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 100.985316][ T10] kthread (kernel/kthread.c:388) [ 100.985424][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 100.985558][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 100.985692][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage