======================================
| [  878.829038] #6: ffffffffb53678c0 (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) 
| [  878.829527] #7: ffffffffb53678c0 (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) 
| [  878.830022]
| [  878.830022] stack backtrace:
[  878.830688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  878.831300] Call Trace:
[  878.831438]  <TASK>
[  878.831588] dump_stack_lvl (lib/dump_stack.c:108) 
[  878.831808] __lock_acquire (kernel/locking/lockdep.c:5138) 
[  878.832038] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) 
[  878.832275] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[  878.832467] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[  878.832669] ? sk_filter_trim_cap (net/core/filter.c:165) 
[  878.832910] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[  878.833161] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[  878.833365] tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[  878.833566] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[  878.833809] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[  878.834077] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[  878.834342] netif_receive_skb (net/core/dev.c:5742 net/core/dev.c:5801) 
[  878.834568] tcf_mirred_to_dev (net/sched/act_mirred.c:327) act_mirred
[  878.834846] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[  878.835116] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit
[  878.835401] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) 
[  878.835645] fl_classify (net/sched/cls_flower.c:345) cls_flower
[  878.835926] ? __bfs (kernel/locking/lockdep.c:1787) 
[  878.836110] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[  878.836327] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[  878.836590] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[  878.836812] ? __skb_flow_dissect (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/flow_dissector.c:1101) 
[  878.837046] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) 
[  878.837286] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) 
[  878.837493] tc_run (net/core/dev.c:3945) 
[  878.837673] __dev_queue_xmit (net/core/dev.c:4069 net/core/dev.c:4301) 
[  878.837896] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[  878.838138] ? eth_header (net/ethernet/eth.c:85) 
[  878.838336] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[  878.838562] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[  878.838788] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[  878.839006] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[  878.839258] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[  878.839491] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[  878.839717] ? tcp_current_mss (./include/net/dst.h:216 net/ipv4/tcp_output.c:1864) 
[  878.839943] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[  878.840210] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6881) 
[  878.840460] ? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[  878.840686] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) 
[  878.840904] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) 
[  878.841124] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) 
[  878.841329] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2330) 
[  878.841527] ? process_backlog (net/core/dev.c:5978 (discriminator 2)) 
[  878.841749] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[  878.841994] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[  878.842241] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[  878.842508] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5985) 
[  878.842720] __napi_poll.constprop.0 (net/core/dev.c:6584) 
[  878.842970] net_rx_action (net/core/dev.c:6655 net/core/dev.c:6786) 
[  878.843181] __do_softirq (kernel/softirq.c:553) 
[  878.843385] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[  878.843661] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[  878.843872] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[  878.844095] kthread (kernel/kthread.c:388) 
[  878.844275] ? __pfx_kthread (kernel/kthread.c:341) 
[  878.844474] ret_from_fork (arch/x86/kernel/process.c:147) 
[  878.844670] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested