======================================
| [ 1168.318240] #6: ffffffffacf678c0 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5729 net/core/dev.c:5801) 
| [ 1168.318910] #7: ffffffffacf678c0 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/ipv4/ip_input.c:232) 
| [ 1168.319633]
| [ 1168.319633] stack backtrace:
[ 1168.320576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1168.321399] Call Trace:
[ 1168.321599]  <TASK>
[ 1168.321807] dump_stack_lvl (lib/dump_stack.c:108) 
[ 1168.322116] __lock_acquire (kernel/locking/lockdep.c:5138) 
[ 1168.322466] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) 
[ 1168.322839] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[ 1168.323154] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[ 1168.323446] ? sk_filter_trim_cap (net/core/filter.c:165) 
[ 1168.323816] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[ 1168.324136] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[ 1168.324420] tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[ 1168.324719] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1168.325054] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1168.325389] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[ 1168.325774] netif_receive_skb (net/core/dev.c:5742 net/core/dev.c:5801) 
[ 1168.326092] tcf_mirred_to_dev (net/sched/act_mirred.c:327) act_mirred
[ 1168.326539] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[ 1168.326903] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit
[ 1168.327294] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) 
[ 1168.327665] fl_classify (net/sched/cls_flower.c:345) cls_flower
[ 1168.328043] ? fl_mask_lookup (net/sched/cls_flower.c:296) cls_flower
[ 1168.328451] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 1168.328720] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[ 1168.329055] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 1168.329403] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 1168.329722] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 1168.330058] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) 
[ 1168.330394] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) 
[ 1168.330704] tc_run (net/core/dev.c:3945) 
[ 1168.330956] __dev_queue_xmit (net/core/dev.c:4069 net/core/dev.c:4301) 
[ 1168.331358] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 1168.331656] ip_finish_output2 (./include/linux/netdevice.h:3171 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 1168.332034] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1168.332374] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1168.332688] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 1168.333052] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 1168.333372] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 1168.333699] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 1168.334053] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6881) 
[ 1168.334436] ? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[ 1168.334748] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[ 1168.335071] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) 
[ 1168.335359] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) 
[ 1168.335705] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2330) 
[ 1168.335979] ? process_backlog (net/core/dev.c:5978 (discriminator 2)) 
[ 1168.336297] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1168.336690] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1168.337046] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[ 1168.337417] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5985) 
[ 1168.337753] __napi_poll.constprop.0 (net/core/dev.c:6584) 
[ 1168.338123] net_rx_action (net/core/dev.c:6655 net/core/dev.c:6786) 
[ 1168.338442] __do_softirq (kernel/softirq.c:553) 
[ 1168.338730] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1168.339117] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 1168.339404] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1168.339764] kthread (kernel/kthread.c:388) 
[ 1168.340031] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1168.340345] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1168.340641] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested