======================================
| [   19.903755] #6: ffffffff8d1678c0 (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) 
| [   19.904243] #7: ffffffff8d1678c0 (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) 
| [   19.904730]
| [   19.904730] stack backtrace:
[   19.905404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   19.906005] Call Trace:
[   19.906143]  <TASK>
[   19.906314] dump_stack_lvl (lib/dump_stack.c:108) 
[   19.906548] __lock_acquire (kernel/locking/lockdep.c:5138) 
[   19.906800] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) 
[   19.907061] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[   19.907254]
DETECTED CRASH, lowering timeout
? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[   19.907485] ? sk_filter_trim_cap (net/core/filter.c:165) 
[   19.907757] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[   19.908014] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[   19.908211] tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[   19.908437] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[   19.908712] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[   19.908979] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[   19.909241] netif_receive_skb (net/core/dev.c:5742 net/core/dev.c:5801) 
[   19.909494] tcf_mirred_to_dev (net/sched/act_mirred.c:327) act_mirred
[   19.909805] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[   19.910094] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit
[   19.910413] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) 
[   19.910656] fl_classify (net/sched/cls_flower.c:345) cls_flower
[   19.910942] ? fl_mask_lookup (net/sched/cls_flower.c:296) cls_flower
[   19.911217] ? __bfs (kernel/locking/lockdep.c:1787) 
[   19.911412] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[   19.911679] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[   19.911971] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[   19.912196] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) 
[   19.912443] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) 
[   19.912697] tc_run (net/core/dev.c:3945) 
[   19.912906] __dev_queue_xmit (net/core/dev.c:4069 net/core/dev.c:4301) 
[   19.913171] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[   19.913404] ip_finish_output2 (./include/linux/netdevice.h:3171 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[   19.913680] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[   19.913938] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[   19.914160] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[   19.914421] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[   19.914674] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[   19.914910] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[   19.915159] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6870) 
[   19.915433] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[   19.915688] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[   19.915928] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[   19.916127] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2329) 
[   19.916342] ? process_backlog (net/core/dev.c:5978 (discriminator 2)) 
[   19.916591] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[   19.916866] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[   19.917133] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[   19.917398] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5985) 
[   19.917615] __napi_poll.constprop.0 (net/core/dev.c:6613) 
[   19.917915] net_rx_action (net/core/dev.c:6684 net/core/dev.c:6815) 
[   19.918117] __do_softirq (kernel/softirq.c:553) 
[   19.918340] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[   19.918635] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[   19.918876] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[   19.919125] kthread (kernel/kthread.c:388) 
[   19.919299] ? __pfx_kthread (kernel/kthread.c:341) 
[   19.919561] ret_from_fork (arch/x86/kernel/process.c:147) 
[   19.919796] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested