======================================
| [ 35.013015][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [ 35.013315][ C2]
| [ 35.013434][ C2]
| [ 35.013434][ C2] stack backtrace:
[ 35.014052][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 35.014675][ C2] Workqueue: mld mld_ifc_work
[ 35.014869][ C2] Call Trace:
[ 35.015013][ C2]
[ 35.015106][ C2] dump_stack_lvl (lib/dump_stack.c:117)
[ 35.015298][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 35.015742][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
[ 35.015923][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 35.016155][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 35.016338][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 35.016749][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24)
[ 35.016934][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 35.017124][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 35.017301][ C2] ? stack_trace_save (kernel/stacktrace.c:123)
[ 35.017817][ C2] ? save_trace (kernel/locking/lockdep.c:586)
[ 35.018034][ C2] mark_lock (kernel/locking/lockdep.c:4678)
[ 35.018170][ C2] mark_usage (kernel/locking/lockdep.c:4567)
[ 35.018309][ C2] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 35.018488][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 35.018799][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 35.019075][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 35.019255][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 35.019432][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 35.019738][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 35.019914][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 35.020192][ C2] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
[ 35.020375][ C2] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 35.020676][ C2] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 35.020860][ C2] ndisc_send_ns (net/ipv6/ndisc.c:658)
[ 35.021093][ C2] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 35.021403][ C2] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009)
[ 35.021771][ C2] ndisc_solicit (net/ipv6/ndisc.c:736)
[ 35.021949][ C2] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736)
[ 35.022135][ C2] ? neigh_probe (net/core/neighbour.c:1074)
[ 35.022350][ C2] neigh_probe (net/core/neighbour.c:1075)
[ 35.022550][ C2] __neigh_event_send (net/core/neighbour.c:1242)
[ 35.022734][ C2] neigh_resolve_output (net/core/neighbour.c:1547)
[ 35.022913][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 35.023098][ C2] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 35.023277][ C2] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 35.023474][ C2] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 35.023734][ C2] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 35.023870][ C2] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 35.024059][ 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)
[ 35.024360][ C2] ? ip6_mtu (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336 net/ipv6/route.c:3217)
[ 35.024497][ C2] ? ip6_local_out (net/ipv6/output_core.c:154)
[ 35.024739][ C2] udp_tunnel6_xmit_skb (./include/net/ip6_tunnel.h:163 net/ipv6/ip6_udp_tunnel.c:111) ip6_udp_tunnel
[ 35.025019][ C2] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2551) vxlan
[ 35.025213][ C2] ? stack_access_ok (arch/x86/kernel/unwind_orc.c:396)
[ 35.025518][ C2] ? ip6_setup_cork (./include/net/dst.h:216 net/ipv6/ip6_output.c:1382)
[ 35.025696][ C2] ? __pfx_vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2313) vxlan
[ 35.026035][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 35.026214][ C2] ? orc_sort_cmp (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:271)
[ 35.026531][ C2] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:833 net/core/dev.c:4297)
[ 35.026710][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 35.026890][ C2] ? vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2766) vxlan
[ 35.027183][ C2] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2766) vxlan
[ 35.027503][ 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)
[ 35.027682][ C2] ? validate_xmit_skb.constprop.0 (net/core/dev.c:3634)
[ 35.027904][ C2] __dev_queue_xmit (net/core/dev.h:167 net/core/dev.c:4373)
[ 35.028103][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 35.028511][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 35.028688][ C2] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 35.028866][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 35.029095][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 35.029544][ C2] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 35.029808][ C2] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 35.030075][ C2] ? __br_forward (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/bridge/br_forward.c:115) bridge
[ 35.030299][ C2] deliver_clone (net/bridge/br_forward.c:132) bridge
[ 35.030746][ C2] br_handle_frame_finish (net/bridge/br_input.c:215) bridge
[ 35.031013][ C2] ? __pfx_br_handle_frame_finish (net/bridge/br_input.c:75) bridge
[ 35.031270][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 35.031454][ C2] br_handle_frame (net/bridge/br_input.c:417) bridge
[ 35.031904][ C2] ? __pfx_br_handle_frame (net/bridge/br_input.c:321) bridge
[ 35.032177][ C2] __netif_receive_skb_core.constprop.0 (net/core/dev.c:5498)
[ 35.032401][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 35.032537][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 35.032714][ C2] ? __pfx___netif_receive_skb_core.constprop.0 (net/core/dev.c:5391)
[ 35.033046][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 35.033223][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 35.033401][ C2] __netif_receive_skb_one_core (net/core/dev.c:5603)
[ 35.033743][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597)
[ 35.034009][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 35.034247][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 35.034547][ C2] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 35.034725][ C2] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048)
[ 35.034903][ C2] __napi_poll.constprop.0 (net/core/dev.c:6701)
[ 35.035109][ C2] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886)
[ 35.035371][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 35.035669][ C2] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263)
[ 35.035851][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 35.036041][ C2] __do_softirq (kernel/softirq.c:554)
[ 35.036218][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 35.036636][ C2] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 35.036771][ C2]
[ 35.036862][ C2]
[ 35.036953][ C2] __local_bh_enable_ip (kernel/softirq.c:382)
[ 35.037226][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 35.037639][ C2] __dev_queue_xmit (net/core/dev.c:4400)
[ 35.037821][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 35.037957][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 35.038146][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 35.038322][ C2] ? eth_header (net/ethernet/eth.c:100)
[ 35.038668][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 35.038905][ C2] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 35.039094][ C2] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 35.039270][ C2] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 35.039528][ C2] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 35.039705][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 35.040001][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 35.040182][ C2] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 35.040358][ C2] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 35.040662][ 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)
[ 35.040840][ C2] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308)
[ 35.041113][ C2] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3136)
[ 35.041344][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 35.041696][ C2] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 35.041875][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 35.042077][ C2] mld_sendpack (net/ipv6/mcast.c:1822)
[ 35.042345][ C2] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779)
[ 35.042645][ C2] ? __pfx___mutex_lock (kernel/locking/mutex.c:751)
[ 35.042823][ C2] ? mld_send_cr (net/ipv6/mcast.c:2096 (discriminator 11))
[ 35.043013][ C2] mld_ifc_work (net/ipv6/mcast.c:2652)
[ 35.043191][ C2] process_one_work (kernel/workqueue.c:3254)
[ 35.043682][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 35.043978][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3156)
[ 35.044277][ C2] ? assign_work (kernel/workqueue.c:1209)
[ 35.044571][ C2] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
[ 35.045087][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 35.045464][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 35.045763][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 35.046055][ C2] kthread (kernel/kthread.c:388)
[ 35.046513][ C2] ? __pfx_kthread (kernel/kthread.c:341)
[ 35.046810][ C2] ret_from_fork (arch/x86/kernel/process.c:147)
[ 35.047102][ C2] ? __pfx_kthread (kernel/kthread.c:341)
Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock