====================================== | xx__-> [ 29.929158][ T301] ip (301) used greatest stack depth: 24048 bytes left | [ 30.437640][ T304] ip (304) used greatest stack depth: 23520 bytes left | [ 30.886890][ T213] BUG: spinlock bad magic on CPU#2, kworker/2:2/213 | [ 30.887079][ T213] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/2:2/213, .owner_cpu: 2 [ 30.887498][ T213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 30.887767][ T213] Workqueue: mld mld_ifc_work [ 30.887897][ T213] Call Trace: [ 30.887994][ T213] [ 30.888058][ T213] dump_stack_lvl (lib/dump_stack.c:122) [ 30.888194][ T213] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) [ 30.888318][ T213] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) [ 30.888453][ T213] __dev_xmit_skb (./include/net/sch_generic.h:226 ./include/net/sch_generic.h:217 net/core/dev.c:3879) [ 30.888578][ T213] ? __pfx___dev_xmit_skb (net/core/dev.c:3784) [ 30.888704][ T213] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4291 kernel/locking/lockdep.c:4358) [ 30.888856][ T213] __dev_queue_xmit (net/core/dev.c:4389) [ 30.888981][ T213] ? __lock_release (kernel/locking/lockdep.c:5435) [ 30.889103][ T213] ? ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) [ 30.889227][ T213] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 30.889348][ T213] ? __pfx___dev_queue_xmit (net/core/dev.c:4332) [ 30.889473][ T213] ? mark_held_locks (kernel/locking/lockdep.c:4273) [ 30.889595][ T213] ? eth_header (net/ethernet/eth.c:100) [ 30.889719][ T213] ? neigh_resolve_output (./include/linux/netdevice.h:3159 net/core/neighbour.c:1560 net/core/neighbour.c:1545) [ 30.889847][ T213] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) [ 30.889970][ T213] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) [ 30.890094][ T213] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) [ 30.890189][ T213] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) [ 30.890314][ T213] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) [ 30.890437][ T213] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 30.890560][ T213] ? __lock_release (kernel/locking/lockdep.c:5435) [ 30.890682][ T213] ? icmp6_dst_alloc (net/ipv6/route.c:3295) [ 30.890809][ T213] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:326 ./include/linux/rcupdate.h:838 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312) [ 30.890931][ T213] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308) [ 30.891055][ T213] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3140) [ 30.891211][ T213] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) [ 30.891492][ T213] ? icmp6_dst_alloc (net/ipv6/route.c:3295) [ 30.891613][ T213] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 kernel/softirq.c:387) [ 30.891736][ T213] mld_sendpack (net/ipv6/mcast.c:1822) [ 30.891858][ T213] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779) [ 30.891982][ T213] ? mld_send_cr (net/ipv6/mcast.c:2096 (discriminator 11)) [ 30.892169][ T213] mld_ifc_work (net/ipv6/mcast.c:2652) [ 30.892291][ T213] process_one_work (kernel/workqueue.c:3231) [ 30.892416][ T213] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 30.892537][ T213] ? __pfx_process_one_work (kernel/workqueue.c:3133) [ 30.892725][ T213] ? assign_work (kernel/workqueue.c:1202) [ 30.892847][ T213] worker_thread (kernel/workqueue.c:3306 kernel/workqueue.c:3390) [ 30.892966][ T213] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) [ 30.893115][ T213] ? __pfx_worker_thread (kernel/workqueue.c:3339) [ 30.893306][ T213] ? __pfx_worker_thread (kernel/workqueue.c:3339) [ 30.893426][ T213] kthread (kernel/kthread.c:389) [ 30.893520][ T213] ? __pfx_kthread (kernel/kthread.c:342) [ 30.893640][ T213] ret_from_fork (arch/x86/kernel/process.c:147) [ 30.893762][ T213] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: do_raw_spin_unlock:_raw_spin_unlock:__dev_xmit_skb:__dev_queue_xmit:ip6_finish_output2