======================================
| [ 32.357290][ C1] ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [ 32.357439][ C1]
| [ 32.357513][ C1]
| [ 32.357513][ C1] stack backtrace:
[ 32.358017][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 32.358447][ C1] Workqueue: ipv6_addrconf addrconf_dad_work
[ 32.358640][ C1] Call Trace:
[ 32.358758][ C1]
[ 32.358838][ C1] dump_stack_lvl (lib/dump_stack.c:117)
[ 32.358990][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.359367][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
[ 32.359523][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.359726][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 32.359883][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 32.360134][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24)
[ 32.360298][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 32.360454][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 32.360610][ C1] ? stack_trace_save (kernel/stacktrace.c:123)
[ 32.360871][ C1] ? save_trace (kernel/locking/lockdep.c:586)
[ 32.361025][ C1] mark_lock (kernel/locking/lockdep.c:4678)
[ 32.361141][ C1] mark_usage (kernel/locking/lockdep.c:4567)
[ 32.361258][ C1] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 32.361429][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.361673][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.361824][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.361976][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.362125][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.362369][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.362518][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.362667][ C1] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
[ 32.362855][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.363109][ C1] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.363263][ C1] ndisc_send_ns (net/ipv6/ndisc.c:658)
[ 32.363417][ C1] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 32.363570][ C1] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009)
[ 32.363862][ C1] ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.364020][ C1] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.364174][ C1] ? neigh_probe (net/core/neighbour.c:1074)
[ 32.364329][ C1] neigh_probe (net/core/neighbour.c:1075)
[ 32.364450][ C1] __neigh_event_send (net/core/neighbour.c:1242)
[ 32.364605][ C1] neigh_resolve_output (net/core/neighbour.c:1547)
[ 32.364758][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.364914][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 32.365069][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.365224][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.365379][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.365495][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.365649][ C1] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336)
[ 32.365945][ C1] 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)
[ 32.366103][ C1] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594)
[ 32.366259][ C1] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494)
[ 32.366414][ C1] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291)
[ 32.366569][ C1] ? 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)
[ 32.366685][ C1] 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)
[ 32.366801][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.366957][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.367113][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.367365][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.367517][ C1] __netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.367708][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.367899][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.368159][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.368313][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.368475][ C1] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048)
[ 32.368624][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 32.368876][ C1] __napi_poll.constprop.0 (net/core/dev.c:6701)
[ 32.369027][ C1] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886)
[ 32.369182][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 32.369332][ C1] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263)
[ 32.369484][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.369635][ C1] __do_softirq (kernel/softirq.c:554)
[ 32.369786][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.369937][ C1] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 32.370052][ C1]
[ 32.370226][ C1]
[ 32.370301][ C1] __local_bh_enable_ip (kernel/softirq.c:382)
[ 32.370450][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.370600][ C1] __dev_queue_xmit (net/core/dev.c:4400)
[ 32.370750][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 32.370962][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.371112][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.371264][ C1] ? eth_header (net/ethernet/eth.c:100)
[ 32.371419][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 32.371568][ C1] ? neigh_resolve_output (./include/linux/netdevice.h:3146 net/core/neighbour.c:1558 net/core/neighbour.c:1543)
[ 32.371719][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.371870][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.372020][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.372134][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.372379][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.372627][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 32.372790][ C1] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 32.372947][ C1] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.373199][ C1] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312)
[ 32.373354][ C1] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308)
[ 32.373510][ C1] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3136)
[ 32.373706][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.373996][ C1] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.374150][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.374307][ C1] mld_sendpack (net/ipv6/mcast.c:1822)
[ 32.374462][ C1] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779)
[ 32.374723][ C1] ipv6_mc_dad_complete (./include/linux/refcount.h:192 net/ipv6/mcast.c:2244)
[ 32.374878][ C1] addrconf_dad_completed (net/ipv6/addrconf.c:4341)
[ 32.375031][ C1] ? 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)
[ 32.375185][ C1] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307)
[ 32.375473][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.375628][ C1] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.375786][ C1] addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.375939][ C1] ? 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)
[ 32.376093][ C1] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.376345][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.376537][ C1] 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)
[ 32.376690][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.376850][ C1] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178)
[ 32.377101][ C1] ? process_one_work (kernel/workqueue.c:3230)
[ 32.377258][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.377411][ C1] ? process_one_work (kernel/workqueue.c:3230)
[ 32.377566][ C1] process_one_work (kernel/workqueue.c:3254)
[ 32.377818][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 32.377974][ C1] ? __pfx_process_one_work (kernel/workqueue.c:3156)
[ 32.378129][ C1] ? assign_work (kernel/workqueue.c:1209)
[ 32.378284][ C1] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
[ 32.378537][ C1] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 32.378693][ C1] kthread (kernel/kthread.c:388)
[ 32.378809][ C1] ? __pfx_kthread (kernel/kthread.c:341)
[ 32.378963][ C1] ret_from_fork (arch/x86/kernel/process.c:147)
[ 32.379119][ C1] ? __pfx_kthread (kernel/kthread.c:341)
Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock