====================================== | [ 175.562722][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 175.562856][ T10] | [ 175.562925][ T10] | [ 175.562925][ T10] stack backtrace: [ 175.563372][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 175.563746][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 175.563917][ T10] Call Trace: [ 175.564021][ T10] [ 175.564095][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 175.564241][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 175.564382][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 175.564519][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 175.564684][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 175.564816][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 175.564917][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 175.565050][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 175.565198][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 175.565337][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 175.565589][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 175.565723][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 175.565858][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 175.565991][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 175.566128][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 175.566353][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 175.566487][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 175.566623][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 175.566758][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 175.566934][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 175.567067][ 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) [ 175.567202][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 175.567303][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 175.567439][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 175.567648][ T10] ? __get_task_comm (fs/exec.c:1234) [ 175.567782][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 175.567887][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 175.568020][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 175.568239][ T10] ? __get_task_comm (fs/exec.c:1234) [ 175.568371][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 175.568503][ T10] ? __get_task_comm (fs/exec.c:1234) [ 175.568636][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 175.568843][ T10] ? __get_task_comm (fs/exec.c:1234) [ 175.568975][ T10] __get_task_comm (fs/exec.c:1234) [ 175.569110][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 175.569245][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 175.569377][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 175.569584][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 175.569717][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 175.569850][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 175.569983][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 175.570194][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 175.570326][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 175.570462][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 175.570594][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 175.570815][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 175.570947][ 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) [ 175.571081][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 175.571215][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 175.571347][ T10] ? kthread (kernel/kthread.c:388) [ 175.571449][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 175.571581][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 175.571718][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 175.571858][ T10] netdev_get_by_index (net/core/dev.c:914) [ 175.571991][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 175.572124][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 175.572290][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 175.572422][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 175.572634][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 175.572775][ T10] ? __kmalloc (mm/slub.c:3980) [ 175.572910][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 175.573045][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 175.573253][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 175.573388][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 175.573553][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 175.573692][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 175.573905][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 175.574046][ 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) [ 175.574179][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 175.574310][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 175.574444][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 175.574576][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 175.574714][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 175.574846][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 175.574979][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 175.575223][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 175.575356][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 175.575489][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 175.575625][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 175.575845][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 175.575978][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 175.576110][ 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) [ 175.576245][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 175.576416][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 175.576553][ T10] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 175.576685][ T10] addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 175.576817][ 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) [ 175.576950][ T10] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094) [ 175.577082][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 175.577247][ 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) [ 175.577384][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 175.577594][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 175.577727][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 175.577861][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 175.577993][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 175.578202][ T10] process_one_work (kernel/workqueue.c:3254) [ 175.578339][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 175.578472][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 175.578611][ T10] ? assign_work (kernel/workqueue.c:1209) [ 175.578822][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 175.578959][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 175.579091][ T10] kthread (kernel/kthread.c:388) [ 175.579195][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 175.579327][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 175.579535][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage