======================================
| [ 32.789340][ C0] ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [ 32.789495][ C0]
| [ 32.789669][ C0]
| [ 32.789669][ C0] stack backtrace:
[ 32.790093][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 32.790442][ C0] Workqueue: ipv6_addrconf addrconf_dad_work
[ 32.790641][ C0] Call Trace:
[ 32.790763][ C0]
[ 32.790843][ C0] dump_stack_lvl (lib/dump_stack.c:117)
[ 32.791103][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.791299][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
[ 32.791457][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 32.791650][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 32.791903][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 32.792058][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24)
[ 32.792214][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 32.792375][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 32.792635][ C0] ? stack_trace_save (kernel/stacktrace.c:123)
[ 32.792793][ C0] ? save_trace (kernel/locking/lockdep.c:586)
[ 32.792953][ C0] mark_lock (kernel/locking/lockdep.c:4678)
[ 32.793071][ C0] mark_usage (kernel/locking/lockdep.c:4567)
[ 32.793189][ C0] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 32.793347][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.793501][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.793677][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.793833][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.793989][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.794145][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.794300][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.794454][ C0] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
[ 32.794710][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.794863][ C0] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934)
[ 32.795017][ C0] ndisc_send_ns (net/ipv6/ndisc.c:658)
[ 32.795173][ C0] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653)
[ 32.795328][ C0] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009)
[ 32.795620][ C0] ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.795782][ C0] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736)
[ 32.795937][ C0] ? neigh_probe (net/core/neighbour.c:1074)
[ 32.796093][ C0] neigh_probe (net/core/neighbour.c:1075)
[ 32.796307][ C0] __neigh_event_send (net/core/neighbour.c:1242)
[ 32.796463][ C0] neigh_resolve_output (net/core/neighbour.c:1547)
[ 32.796617][ C0] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.796771][ C0] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 32.797127][ C0] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.797284][ C0] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.797439][ C0] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.797557][ C0] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.797712][ C0] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336)
[ 32.798006][ C0] 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)
[ 32.798169][ C0] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594)
[ 32.798326][ C0] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494)
[ 32.798484][ C0] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291)
[ 32.798738][ C0] ? 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)
[ 32.798857][ C0] 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)
[ 32.798974][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.799128][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.799286][ C0] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.799442][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 32.799597][ C0] __netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.799789][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597)
[ 32.800080][ C0] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.800238][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.800393][ C0] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046)
[ 32.800548][ C0] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048)
[ 32.800802][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 32.800956][ C0] __napi_poll.constprop.0 (net/core/dev.c:6701)
[ 32.801112][ C0] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886)
[ 32.801268][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 32.801433][ C0] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263)
[ 32.801709][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.801873][ C0] __do_softirq (kernel/softirq.c:554)
[ 32.802028][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.802189][ C0] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 32.802306][ C0]
[ 32.802385][ C0]
[ 32.802469][ C0] __local_bh_enable_ip (kernel/softirq.c:382)
[ 32.802623][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 32.802778][ C0] __dev_queue_xmit (net/core/dev.c:4400)
[ 32.802932][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 32.803052][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 32.803206][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.803361][ C0] ? eth_header (net/ethernet/eth.c:100)
[ 32.803527][ C0] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 32.803682][ C0] ? neigh_resolve_output (./include/linux/netdevice.h:3146 net/core/neighbour.c:1558 net/core/neighbour.c:1543)
[ 32.803839][ C0] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137)
[ 32.803993][ C0] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222)
[ 32.804148][ C0] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243)
[ 32.804367][ C0] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230)
[ 32.804524][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 32.804679][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 32.804834][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 32.804989][ C0] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.805242][ C0] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312)
[ 32.805398][ C0] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308)
[ 32.805554][ C0] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3136)
[ 32.805759][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.806056][ C0] ? icmp6_dst_alloc (net/ipv6/route.c:3293)
[ 32.806210][ C0] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
[ 32.806365][ C0] mld_sendpack (net/ipv6/mcast.c:1822)
[ 32.806522][ C0] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779)
[ 32.806781][ C0] ipv6_mc_dad_complete (./include/linux/refcount.h:192 net/ipv6/mcast.c:2244)
[ 32.806937][ C0] addrconf_dad_completed (net/ipv6/addrconf.c:4341)
[ 32.807091][ C0] ? 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)
[ 32.807248][ C0] ? __pfx_addrconf_dad_completed (net/ipv6/addrconf.c:4307)
[ 32.807538][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 32.807695][ C0] ? addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.807851][ C0] addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.808005][ C0] ? 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)
[ 32.808258][ C0] ? __pfx_addrconf_dad_begin (net/ipv6/addrconf.c:4094)
[ 32.808413][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.808606][ C0] 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)
[ 32.808764][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 32.809118][ C0] ? __pfx_addrconf_dad_work (net/ipv6/addrconf.c:4178)
[ 32.809273][ C0] ? process_one_work (kernel/workqueue.c:3230)
[ 32.809427][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 32.809582][ C0] ? process_one_work (kernel/workqueue.c:3230)
[ 32.809835][ C0] process_one_work (kernel/workqueue.c:3254)
[ 32.809992][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 32.810156][ C0] ? __pfx_process_one_work (kernel/workqueue.c:3156)
[ 32.810318][ C0] ? assign_work (kernel/workqueue.c:1209)
[ 32.810599][ C0] worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
[ 32.810754][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 32.810948][ C0] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 32.811102][ C0] ? __pfx_worker_thread (kernel/workqueue.c:3362)
[ 32.811259][ C0] kthread (kernel/kthread.c:388)
[ 32.811375][ C0] ? __pfx_kthread (kernel/kthread.c:341)
[ 32.811534][ C0] ret_from_fork (arch/x86/kernel/process.c:147)
[ 32.811689][ C0] ? __pfx_kthread (kernel/kthread.c:341)
Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock