======================================
| [ 1236.462328] #6: ffffffffa1d678c0 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5787 net/core/dev.c:5859) 
| [ 1236.463000] #7: ffffffffa1d678c0 (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) 
| [ 1236.463734]
| [ 1236.463734] stack backtrace:
[ 1236.464664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1236.465306] Call Trace:
[ 123
DETECTED CRASH, lowering timeout
6.465445]  <TASK>
[ 1236.465605] dump_stack_lvl (lib/dump_stack.c:108) 
[ 1236.465819] __lock_acquire (kernel/locking/lockdep.c:5138) 
[ 1236.466033] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) 
[ 1236.466274] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[ 1236.466468] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2329) 
[ 1236.466691] ? sk_filter_trim_cap (net/core/filter.c:165) 
[ 1236.466922] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[ 1236.467163] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2329) 
[ 1236.467360] tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2329) 
[ 1236.467562] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1236.467875] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1236.468247] __netif_receive_skb_one_core (net/core/dev.c:5600 (discriminator 4)) 
[ 1236.468631] netif_receive_skb (net/core/dev.c:5800 net/core/dev.c:5859) 
[ 1236.468970] tcf_mirred_to_dev (net/sched/act_mirred.c:327) act_mirred
[ 1236.469402] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[ 1236.469812] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit
[ 1236.470229] ? mce_wrmsrl (arch/x86/kernel/cpu/mce/core.c:413) 
[ 1236.470528] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) 
[ 1236.470851] fl_classify (net/sched/cls_flower.c:345) cls_flower
[ 1236.471244] ? fl_mask_lookup (net/sched/cls_flower.c:296) cls_flower
[ 1236.471678] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 1236.471962] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[ 1236.472292] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 1236.472648] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 1236.473005] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) 
[ 1236.473332] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) 
[ 1236.473630] tc_run (net/core/dev.c:3946) 
[ 1236.473849] __dev_queue_xmit (net/core/dev.c:4070 net/core/dev.c:4302) 
[ 1236.474088] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 1236.474312] ip_finish_output2 (./include/linux/netdevice.h:3172 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 1236.474551] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1236.474797] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1236.475030] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 1236.475256] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 1236.475481] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 1236.475746] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6876) 
[ 1236.475986] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2329) 
[ 1236.476179] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[ 1236.476399] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[ 1236.476685] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2332) 
[ 1236.476986] ? process_backlog (net/core/dev.c:6036 (discriminator 2)) 
[ 1236.477324] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1236.477699] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1236.478076] __netif_receive_skb_one_core (net/core/dev.c:5600 (discriminator 4)) 
[ 1236.478465] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6043) 
[ 1236.478783] __napi_poll.constprop.0 (net/core/dev.c:6671) 
[ 1236.479169] net_rx_action (net/core/dev.c:6742 net/core/dev.c:6871) 
[ 1236.479473] __do_softirq (kernel/softirq.c:553) 
[ 1236.479782] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1236.480172] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 1236.480459] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1236.480799] kthread (kernel/kthread.c:388) 
[ 1236.481072] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1236.481375] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1236.481676] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested