====================================== | [ 34.093510][ T10] ret_from_fork_asm (arch/x86/entry/entry_64.S:256) | [ 34.093641][ T10] | [ 34.093708][ T10] | [ 34.093708][ T10] stack backtrace: [ 34.094148][ T10] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 34.094437][ T10] Workqueue: ipv6_addrconf addrconf_dad_work [ 34.094683][ T10] Call Trace: [ 34.094784][ T10] [ 34.094853][ T10] dump_stack_lvl (lib/dump_stack.c:117) [ 34.094988][ T10] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 34.095124][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 34.095336][ T10] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 34.095504][ T10] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 34.095634][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 34.095732][ T10] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 34.095940][ T10] check_irq_usage (kernel/locking/lockdep.c:2871) [ 34.096077][ T10] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 34.096207][ T10] ? __bfs (kernel/locking/lockdep.c:1787) [ 34.096308][ T10] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 34.096443][ T10] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 34.096649][ T10] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 34.096781][ T10] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 34.096916][ T10] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 34.097049][ T10] check_prev_add (kernel/locking/lockdep.c:3138) [ 34.097259][ T10] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 34.097393][ T10] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 34.097527][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 34.097626][ T10] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 34.097756][ 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) [ 34.097971][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 34.098083][ T10] __lock_acquire (kernel/locking/lockdep.c:5137) [ 34.098216][ T10] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 34.098347][ T10] ? __get_task_comm (fs/exec.c:1234) [ 34.098503][ T10] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 34.098603][ T10] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 34.098772][ T10] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 34.098906][ T10] ? __get_task_comm (fs/exec.c:1234) [ 34.099037][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 34.099168][ T10] ? __get_task_comm (fs/exec.c:1234) [ 34.099303][ T10] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 34.099434][ T10] ? __get_task_comm (fs/exec.c:1234) [ 34.099564][ T10] __get_task_comm (fs/exec.c:1234) [ 34.099773][ T10] ref_tracker_alloc (lib/ref_tracker.c:217) [ 34.099910][ T10] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 34.100042][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 34.100175][ T10] ? netdev_get_by_index (net/core/dev.c:914) [ 34.100382][ T10] ? fib6_nh_init (net/ipv6/route.c:3541) [ 34.100513][ T10] ? ip6_route_info_create (net/ipv6/route.c:3808) [ 34.100645][ T10] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 34.100779][ T10] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 34.100985][ T10] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 34.101120][ T10] ? __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 34.101250][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 34.101380][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 34.101510][ T10] ? process_one_work (kernel/workqueue.c:3254) [ 34.101722][ T10] ? worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 34.101851][ T10] ? kthread (kernel/kthread.c:388) [ 34.101949][ T10] ? ret_from_fork (arch/x86/kernel/process.c:147) [ 34.102080][ T10] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256) [ 34.102371][ T10] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) [ 34.102504][ T10] netdev_get_by_index (net/core/dev.c:914) [ 34.102635][ T10] fib6_nh_init (net/ipv6/route.c:3541) [ 34.102766][ T10] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 34.103004][ T10] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) [ 34.103134][ T10] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 34.103265][ T10] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 34.103397][ T10] ? __kmalloc (mm/slub.c:3980) [ 34.103612][ T10] ? fib6_get_table (net/ipv6/ip6_fib.c:295) [ 34.103743][ T10] ip6_route_info_create (net/ipv6/route.c:3808) [ 34.103878][ T10] ? __lock_release (kernel/locking/lockdep.c:5430) [ 34.104011][ T10] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) [ 34.104251][ T10] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) [ 34.104383][ T10] addrconf_f6i_alloc (net/ipv6/route.c:4584) [ 34.104515][ T10] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) [ 34.104649][ 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) [ 34.104783][ T10] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) [ 34.104994][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 34.105131][ T10] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) [ 34.105261][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 34.105397][ T10] addrconf_join_anycast (net/ipv6/addrconf.c:2264) [ 34.105529][ T10] ? ip6_ins_rt (net/ipv6/route.c:1320) [ 34.105660][ T10] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) [ 34.105828][ T10] __ipv6_ifa_notify (net/ipv6/addrconf.c:6273) [ 34.106017][ T10] ? __pfx___ipv6_ifa_notify (net/ipv6/addrconf.c:6247) [ 34.106148][ T10] ? __pfx___cancel_work (kernel/workqueue.c:4273) [ 34.106283][ T10] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 34.106416][ T10] ? addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 34.106546][ T10] addrconf_dad_completed (net/ipv6/addrconf.c:4324) [ 34.106753][ 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) [ 34.106884][ T10] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307) [ 34.107046][ T10] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 34.107190][ T10] ? addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 34.107398][ T10] addrconf_dad_work (net/ipv6/addrconf.c:4268) [ 34.107529][ T10] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178) [ 34.107659][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 34.107788][ T10] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 34.107993][ T10] ? process_one_work (kernel/workqueue.c:3230) [ 34.108139][ T10] process_one_work (kernel/workqueue.c:3254) [ 34.108273][ T10] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 34.108408][ T10] ? __pfx_process_one_work (kernel/workqueue.c:3156) [ 34.108542][ T10] ? assign_work (kernel/workqueue.c:1209) [ 34.108751][ T10] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416) [ 34.108888][ T10] ? __pfx_worker_thread (kernel/workqueue.c:3362) [ 34.109049][ T10] kthread (kernel/kthread.c:388) [ 34.109158][ T10] ? __pfx_kthread (kernel/kthread.c:341) [ 34.109379][ T10] ret_from_fork (arch/x86/kernel/process.c:147) [ 34.109520][ T10] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: ret_from_fork_asm:dump_stack_lvl:print_bad_irq_dependency:check_irq_usage