====================================== | [ 35.118575][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 35.118712][ T10] | [ 35.118797][ T10] | [ 35.118797][ T10] stack backtrace: [ 35.119196][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 35.119580][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 35.119751][ T10] Call Trace: [ 35.119856][ T10] [ 35.119928][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 35.120067][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 35.120204][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.120337][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 35.120497][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 35.120716][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.120819][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 35.120953][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 35.121091][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 35.121231][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 35.121337][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 35.121579][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 35.121801][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 35.121939][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 35.122078][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 35.122210][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 35.122344][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 35.122479][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 35.122615][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.122733][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 35.122947][ 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) [ 35.123079][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.123232][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 35.123369][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 35.123590][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.123724][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 35.123825][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 35.123956][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 35.124090][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.124295][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.124426][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.124557][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 35.124692][ T10] ? __get_task_comm (fs/exec.c:1234) [ 35.124825][ T10] __get_task_comm (fs/exec.c:1234) [ 35.124980][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 35.125121][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 35.125270][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.125498][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 35.125630][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 35.125762][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 35.125896][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.126117][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.126266][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.126398][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.126548][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.126689][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.126907][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 35.127062][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.127204][ T10] ? kthread (kernel/kthread.c:388) [ 35.127316][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 35.127551][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 35.127792][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 35.127928][ T10] netdev_get_by_index (net/core/dev.c:914) [ 35.128063][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 35.128204][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 35.128376][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 35.128513][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 35.128742][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 35.128883][ T10] ? __kmalloc (mm/slub.c:3980) [ 35.129023][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 35.129162][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 35.129287][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 35.129523][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 35.129693][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 35.129831][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 35.129965][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 35.130112][ 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) [ 35.130336][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 35.130469][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.130611][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 35.130750][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.130891][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 35.131030][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 35.131169][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 35.131342][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 35.131615][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 35.131748][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 35.131884][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 35.132016][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.132177][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 35.132315][ 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) [ 35.132527][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 35.132718][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 35.132933][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.133081][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 35.133208][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 35.133341][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 35.133521][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 35.133649][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 35.133890][ T10] process_one_work (kernel/workqueue.c:3254) [ 35.134026][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 35.134162][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 35.134326][ T10] ? assign_work (kernel/workqueue.c:1209) [ 35.134469][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 35.134605][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 35.134833][ T10] kthread (kernel/kthread.c:388) [ 35.134940][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 35.135074][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 35.135219][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage