====================================== | [ 137.660376][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 137.660590][ T10] | [ 137.660660][ T10] | [ 137.660660][ T10] stack backtrace: [ 137.661027][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 137.661410][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 137.661584][ T10] Call Trace: [ 137.661696][ T10] [ 137.661770][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 137.661991][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 137.662128][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 137.662265][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 137.662433][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 137.662643][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 137.662744][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 137.662883][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 137.663026][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 137.663243][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 137.663345][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 137.663481][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 137.663616][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 137.663749][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 137.663885][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 137.664024][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 137.664158][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 137.664295][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 137.664515][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 137.664633][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 137.664770][ 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) [ 137.664905][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 137.665009][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 137.665224][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 137.665361][ T10] ? __get_task_comm (fs/exec.c:1234) [ 137.665495][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 137.665598][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 137.665734][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 137.665869][ T10] ? __get_task_comm (fs/exec.c:1234) [ 137.666002][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 137.666139][ T10] ? __get_task_comm (fs/exec.c:1234) [ 137.666274][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 137.666488][ T10] ? __get_task_comm (fs/exec.c:1234) [ 137.666628][ T10] __get_task_comm (fs/exec.c:1234) [ 137.666763][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 137.666900][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 137.667110][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 137.667245][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 137.667380][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 137.667516][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 137.667728][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 137.667864][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 137.667997][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 137.668132][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 137.668341][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 137.668475][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 137.668607][ T10] ? 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) [ 137.668740][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 137.668882][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 137.669095][ T10] ? kthread (kernel/kthread.c:388) [ 137.669197][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 137.669331][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 137.669465][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 137.669678][ T10] netdev_get_by_index (net/core/dev.c:914) [ 137.669811][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 137.669945][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 137.670112][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 137.670329][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 137.670467][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 137.670603][ T10] ? __kmalloc (mm/slub.c:3980) [ 137.670745][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 137.670957][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 137.671091][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 137.671228][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 137.671394][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 137.671611][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 137.671748][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 137.671884][ 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) [ 137.672020][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 137.672154][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 137.672452][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 137.672585][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 137.672719][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 137.672857][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 137.673066][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 137.673233][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 137.673370][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 137.673504][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 137.673715][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 137.673848][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 137.673981][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 137.674118][ 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) [ 137.674334][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 137.674506][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 137.674642][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 137.674774][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 137.674983][ 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) [ 137.675116][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 137.675254][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 137.675425][ T10] 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) [ 137.675635][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 137.675769][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 137.675902][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 137.676034][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 137.676251][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 137.676387][ T10] process_one_work (kernel/workqueue.c:3254) [ 137.676526][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 137.676660][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 137.676796][ T10] ? assign_work (kernel/workqueue.c:1209) [ 137.676930][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 137.677066][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 137.677203][ T10] kthread (kernel/kthread.c:388) [ 137.677305][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 137.677521][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 137.677658][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage