======================================
| [ 32.620383][ C3] ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [ 32.620554][ C3]
| [ 32.620735][ C3]
| [ 32.620735][ C3] stack backtrace:
[ 32.621201][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 32.621675][ C3] Workqueue: ipv6_addrconf addrconf_dad_work
[ 32.621891][ C3] Call Trace:
[ 32.622021][ C3]
[ 32.622108][ C3] dump_stack_lvl (lib/dump_stack.c:117)
[ 32.622390][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.622602][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
[ 32.622773][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.622985][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 32.623154][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 32.623323][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24)
[ 32.623496][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 32.623667][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 32.623941][ C3] ? stack_trace_save (kernel/stacktrace.c:123)
[ 32.624121][ C3] ? save_trace (kernel/locking/lockdep.c:586)
[ 32.624296][ C3] mark_lock (kernel/locking/lockdep.c:4678)
[ 32.624425][ C3] mark_usage (kernel/locking/lockdep.c:4567)
[ 32.624554][ C3] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 32.624828][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.624998][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.625167][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.625337][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.625606][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.625775][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.625950][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.626119][ C3] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
[ 32.626288][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.626564][ C3] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.626734][ C3] ndisc_send_ns (net/ipv6/ndisc.c:658)
[ 32.626903][ C3] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 32.627072][ C3] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009)
[ 32.627287][ C3] ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.627455][ C3] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.627634][ C3] ? neigh_probe (net/core/neighbour.c:1074)
[ 32.627819][ C3] neigh_probe (net/core/neighbour.c:1075)
[ 32.628049][ C3] __neigh_event_send (net/core/neighbour.c:1242)
[ 32.628219][ C3] neigh_resolve_output (net/core/neighbour.c:1547)
[ 32.628390][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.628557][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 32.628825][ C3] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.628995][ C3] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.629165][ C3] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.629294][ C3] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.629466][ C3] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336)
[ 32.629777][ C3] ip6_forward (./include/net/dst.h:450 net/ipv6/ip6_output.c:472 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_output.c:660)
[ 32.629945][ C3] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594)
[ 32.630115][ C3] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494)
[ 32.630285][ C3] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291)
[ 32.630556][ C3] ? ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310)
[ 32.630687][ C3] ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310)
[ 32.630815][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.630990][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.631159][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.631330][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.631498][ C3] __netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.631715][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.632127][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.632296][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.632465][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.632635][ C3] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048)
[ 32.632806][ C3] __napi_poll.constprop.0 (net/core/dev.c:6701)
[ 32.633075][ C3] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886)
[ 32.633252][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 32.633420][ C3] ? do_raw_spin_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/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[ 32.633586][ C3] ? tmigr_cpu_activate (kernel/time/timer_migration.c:683 kernel/time/timer_migration.c:705)
[ 32.633858][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359)
[ 32.634075][ C3] __do_softirq (kernel/softirq.c:554)
[ 32.634247][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.634419][ C3] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 32.634643][ C3]
[ 32.634731][ C3]
[ 32.634816][ C3] __local_bh_enable_ip (kernel/softirq.c:382)
[ 32.634988][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.635157][ C3] __dev_queue_xmit (net/core/dev.c:4400)
[ 32.635425][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 32.635556][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.635725][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.635894][ C3] ? eth_header (net/ethernet/eth.c:100)
[ 32.636064][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 32.636332][ C3] ? neigh_resolve_output (./include/linux/netdevice.h:3146 net/core/neighbour.c:1558 net/core/neighbour.c:1543)
[ 32.636501][ C3] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.636673][ C3] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.636846][ C3] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.637071][ C3] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.637239][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.637408][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 32.637578][ C3] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 32.637745][ C3] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.638013][ C3] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312)
[ 32.638181][ C3] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308)
[ 32.638352][ C3] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3136)
[ 32.638569][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.638875][ C3] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.639042][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.639214][ C3] mld_sendpack (net/ipv6/mcast.c:1822)
[ 32.639384][ C3] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779)
[ 32.639656][ C3] ipv6_mc_dad_complete (./include/linux/refcount.h:192 net/ipv6/mcast.c:2244)
[ 32.639848][ C3] addrconf_dad_completed (net/ipv6/addrconf.c:4341)
[ 32.640016][ C3] ? 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)
[ 32.640186][ C3] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307)
[ 32.640497][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.640669][ C3] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.640840][ C3] addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.641005][ C3] ? 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)
[ 32.641176][ C3] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.641347][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.641568][ C3] 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)
[ 32.641737][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.642006][ C3] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178)
[ 32.642173][ C3] ? process_one_work (kernel/workqueue.c:3230)
[ 32.642344][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.642514][ C3] ? process_one_work (kernel/workqueue.c:3230)
[ 32.642784][ C3] process_one_work (kernel/workqueue.c:3254)
[ 32.642958][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 32.643129][ C3] ? __pfx_process_one_work (kernel/workqueue.c:3156)
[ 32.643299][ C3] ? assign_work (kernel/workqueue.c:1209)
[ 32.643576][ C3] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
[ 32.643759][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.643995][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 32.644164][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 32.644430][ C3] kthread (kernel/kthread.c:388)
[ 32.644564][ C3] ? __pfx_kthread (kernel/kthread.c:341)
[ 32.644733][ C3] ret_from_fork (arch/x86/kernel/process.c:147)
[ 32.644901][ C3] ? __pfx_kthread (kernel/kthread.c:341)
Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock