======================================
| [ 34.534678][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [ 34.534855][ C2]
| [ 34.534949][ C2]
| [ 34.534949][ C2] stack backtrace:
[ 34.535566][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 34.536093][ C2] Workqueue: ipv6_addrconf addrconf_dad_work
[ 34.536320][ C2] Call Trace:
[ 34.536458][ C2]
[ 34.536550][ C2] dump_stack_lvl (lib/dump_stack.c:117)
[ 34.536737][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 34.537089][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
[ 34.537269][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 34.537490][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 34.537675][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 34.537852][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24)
[ 34.538031][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 34.538209][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 34.538397][ C2] ? stack_trace_save (kernel/stacktrace.c:123)
[ 34.538582][ C2] ? save_trace (kernel/locking/lockdep.c:586)
[ 34.538766][ C2] mark_lock (kernel/locking/lockdep.c:4678)
[ 34.538903][ C2] mark_usage (kernel/locking/lockdep.c:4567)
[ 34.539038][ C2] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 34.539220][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 34.539520][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 34.539704][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 34.539883][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 34.540063][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 34.540363][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 34.540546][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 34.540729][ C2] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
[ 34.540907][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 34.541207][ C2] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 34.541388][ C2] ndisc_send_ns (net/ipv6/ndisc.c:658)
[ 34.541565][ C2] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 34.541751][ C2] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009)
[ 34.542095][ C2] ndisc_solicit (net/ipv6/ndisc.c:736)
[ 34.542273][ C2] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736)
[ 34.542452][ C2] ? neigh_probe (net/core/neighbour.c:1074)
[ 34.542633][ C2] neigh_probe (net/core/neighbour.c:1075)
[ 34.542768][ C2] __neigh_event_send (net/core/neighbour.c:1242)
[ 34.543076][ C2] neigh_resolve_output (net/core/neighbour.c:1547)
[ 34.543252][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 34.543429][ C2] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 34.543608][ C2] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 34.543786][ C2] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 34.543968][ C2] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 34.544102][ C2] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 34.544278][ C2] ? pskb_expand_head (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 net/core/skbuff.c:2267)
[ 34.544457][ C2] ? ip6_mtu (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336 net/ipv6/route.c:3217)
[ 34.544591][ C2] ? ip6_local_out (net/ipv6/output_core.c:154)
[ 34.544778][ C2] udp_tunnel6_xmit_skb (./include/net/ip6_tunnel.h:163 net/ipv6/ip6_udp_tunnel.c:111) ip6_udp_tunnel
[ 34.545005][ C2] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2551) vxlan
[ 34.545203][ C2] ? stack_access_ok (arch/x86/kernel/unwind_orc.c:396)
[ 34.545630][ C2] ? ip6_fraglist_init (./include/linux/skbuff.h:2711 net/ipv6/ip6_output.c:715)
[ 34.545809][ C2] ? __pfx_vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2313) vxlan
[ 34.546043][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 34.546221][ C2] ? orc_sort_cmp (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:271)
[ 34.546523][ C2] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:833 net/core/dev.c:4297)
[ 34.546707][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 34.546886][ C2] ? vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2766) vxlan
[ 34.547076][ C2] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2766) vxlan
[ 34.547396][ C2] dev_hard_start_xmit (./include/linux/netdevice.h:4875 ./include/linux/netdevice.h:4889 net/core/dev.c:3563 net/core/dev.c:3579)
[ 34.547574][ C2] ? validate_xmit_skb.constprop.0 (net/core/dev.c:3634)
[ 34.547803][ C2] __dev_queue_xmit (net/core/dev.h:167 net/core/dev.c:4373)
[ 34.547983][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 34.548284][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 34.548479][ C2] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 34.548665][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 34.548846][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 34.549153][ C2] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 34.549418][ C2] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 34.549679][ C2] ? __br_forward (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/bridge/br_forward.c:115) bridge
[ 34.549892][ C2] deliver_clone (net/bridge/br_forward.c:132) bridge
[ 34.550227][ C2] br_handle_frame_finish (net/bridge/br_input.c:215) bridge
[ 34.550486][ C2] ? __pfx_br_handle_frame_finish (net/bridge/br_input.c:75) bridge
[ 34.550750][ C2] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263)
[ 34.550929][ C2] ? check_prev_add (kernel/locking/lockdep.c:3116)
[ 34.551232][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 34.551413][ C2] br_handle_frame (net/bridge/br_input.c:417) bridge
[ 34.551627][ C2] ? __pfx_br_handle_frame (net/bridge/br_input.c:321) bridge
[ 34.551883][ C2] __netif_receive_skb_core.constprop.0 (net/core/dev.c:5498)
[ 34.552231][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 34.552370][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 34.552554][ C2] ? __pfx___netif_receive_skb_core.constprop.0 (net/core/dev.c:5391)
[ 34.552781][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 34.553093][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 34.553275][ C2] __netif_receive_skb_one_core (net/core/dev.c:5603)
[ 34.553497][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597)
[ 34.553726][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 34.553904][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 34.554082][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 34.554264][ C2] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048)
[ 34.554445][ C2] __napi_poll.constprop.0 (net/core/dev.c:6701)
[ 34.554635][ C2] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886)
[ 34.554817][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 34.554999][ C2] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263)
[ 34.555178][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 34.555482][ C2] __do_softirq (kernel/softirq.c:554)
[ 34.555668][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 34.555851][ C2] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 34.555986][ C2]
[ 34.556166][ C2]
[ 34.556379][ C2] __local_bh_enable_ip (kernel/softirq.c:382)
[ 34.556557][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 34.556735][ C2] __dev_queue_xmit (net/core/dev.c:4400)
[ 34.556913][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 34.557048][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 34.557354][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 34.557534][ C2] ? eth_header (net/ethernet/eth.c:100)
[ 34.557712][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 34.557893][ C2] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 34.558193][ C2] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 34.558371][ C2] ? 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)
[ 34.558561][ C2] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 34.558696][ C2] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 34.558873][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 34.559176][ C2] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312)
[ 34.559364][ C2] ? ndisc_send_skb (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/ipv6/ndisc.c:455 net/ipv6/ndisc.c:503)
[ 34.559542][ C2] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308)
[ 34.559722][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 34.560034][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 34.560214][ C2] ndisc_send_skb (net/ipv6/ndisc.c:512 (discriminator 60))
[ 34.560397][ C2] ? __pfx_ndisc_send_skb (net/ipv6/ndisc.c:473)
[ 34.560579][ C2] ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 34.560757][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 34.560896][ C2] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 34.561076][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 34.561253][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 34.561476][ C2] addrconf_dad_work (net/ipv6/addrconf.c:4280)
[ 34.561654][ C2] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178)
[ 34.561832][ C2] ? process_one_work (kernel/workqueue.c:3230)
[ 34.562010][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 34.562192][ C2] ? process_one_work (kernel/workqueue.c:3230)
[ 34.562498][ C2] process_one_work (kernel/workqueue.c:3254)
[ 34.562677][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 34.562857][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3156)
[ 34.563036][ C2] ? assign_work (kernel/workqueue.c:1209)
[ 34.563337][ C2] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
[ 34.563520][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 34.563698][ C2] kthread (kernel/kthread.c:388)
[ 34.563832][ C2] ? __pfx_kthread (kernel/kthread.c:341)
[ 34.564136][ C2] ret_from_fork (arch/x86/kernel/process.c:147)
[ 34.564314][ C2] ? __pfx_kthread (kernel/kthread.c:341)
Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock