====================================== | [ 32.221774][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 32.222020][ T10] | [ 32.222103][ T10] | [ 32.222103][ T10] stack backtrace: [ 32.222551][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.222902][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.223103][ T10] Call Trace: [ 32.223226][ T10] [ 32.223317][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 32.223480][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 32.223649][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.223831][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 32.224110][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 32.224273][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.224393][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 32.224554][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 32.224715][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 32.224949][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 32.225067][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 32.225233][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 32.225390][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 32.225548][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 32.225710][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 32.225869][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 32.226028][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 32.226189][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 32.226423][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.226548][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 32.226707][ 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) [ 32.226866][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.227064][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 32.227225][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 32.227386][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.227546][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 32.227665][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 32.227906][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.228066][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.228225][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.228385][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.228621][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 32.228779][ T10] ? __get_task_comm (fs/exec.c:1234) [ 32.228938][ T10] __get_task_comm (fs/exec.c:1234) [ 32.229097][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 32.229338][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 32.229504][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.229662][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 32.229820][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 32.229988][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 32.230224][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.230383][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.230543][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.230703][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.230945][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.231103][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.231261][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 32.231419][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.231660][ T10] ? kthread (kernel/kthread.c:388) [ 32.231782][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 32.231943][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 32.232104][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 32.232267][ T10] netdev_get_by_index (net/core/dev.c:914) [ 32.232500][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 32.232659][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 32.232858][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 32.233017][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 32.233330][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 32.233489][ T10] ? __kmalloc (mm/slub.c:3980) [ 32.233649][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 32.233825][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 32.234066][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 32.234229][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 32.234429][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 32.234588][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 32.234748][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 32.234909][ 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) [ 32.235067][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 32.235233][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.235395][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 32.235556][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.235717][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 32.235876][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 32.236114][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 32.236311][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 32.236471][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 32.236636][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 32.236874][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 32.237033][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.237193][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 32.237350][ 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) [ 32.237509][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 32.237782][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 32.237943][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.238104][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 32.238265][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 32.238499][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.238656][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 32.238814][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 32.238974][ T10] process_one_work (kernel/workqueue.c:3254) [ 32.239212][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 32.239370][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 32.239538][ T10] ? assign_work (kernel/workqueue.c:1209) [ 32.239697][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 32.239943][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 32.240104][ T10] kthread (kernel/kthread.c:388) [ 32.240229][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 32.240398][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 32.240558][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage