======================================
| [ 1152.625033] #6: ffffffff859678c0 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5696 net/core/dev.c:5768) 
| [ 1152.625695] #7: ffffffff859678c0 (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) 
| [ 1152.626423]
| [ 1152.626423] stack backtrace:
[ 1152.627326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1152.628188] Call Trace:
[ 1152.628378]  <TASK>
[ 1152.628560] dump_stack_lvl (lib/dump_stack.c:108) 
[ 1152.628852] __lock_acquire (kernel/locking/lockdep.c:5138) 
[ 1152.629169] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) 
[ 1152.629425] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) 
[ 1152.629636] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1152.629841] ? sk_filter_trim_cap (net/core/filter.c:165) 
[ 1152.630105] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[ 1152.630352] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1152.630567] tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1152.630770] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1152.631036] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1152.631285] __netif_receive_skb_one_core (net/core/dev.c:5509 (discriminator 4)) 
[ 1152.631562] netif_receive_skb (net/core/dev.c:5709 net/core/dev.c:5768) 
[ 1152.631802] tcf_mirred_to_dev (net/sched/act_mirred.c:327) act_mirred
[ 1152.632095] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[ 1152.632374] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit
[ 1152.632669] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) 
[ 1152.632896]  f
DETECTED CRASH, lowering timeout
l_classify+0x20e/0x260 cls_flower
[ 1152.633168] ? fl_mask_lookup (net/sched/cls_flower.c:296) cls_flower
[ 1152.633453] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 1152.633645] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[ 1152.633881] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 1152.634161] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 1152.634398] ? lock_release (kernel/locking/lockdep.c:5430 kernel/locking/lockdep.c:5774) 
[ 1152.634596] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) 
[ 1152.634811] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) 
[ 1152.635034] tc_run (net/core/dev.c:3912) 
[ 1152.635208] __dev_queue_xmit (net/core/dev.c:4036 net/core/dev.c:4268) 
[ 1152.635461] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 1152.635688] ip_finish_output2 (./include/linux/netdevice.h:3173 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 1152.635923] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1152.636152] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[ 1152.636381] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 1152.636622] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 1152.636831] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 1152.637144] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6870) 
[ 1152.637458] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1152.637743] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[ 1152.638042] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[ 1152.638344] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2329) 
[ 1152.638626] ? process_backlog (net/core/dev.c:5945 (discriminator 2)) 
[ 1152.638951] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[ 1152.639301] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1152.639667] __netif_receive_skb_one_core (net/core/dev.c:5509 (discriminator 4)) 
[ 1152.640061] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5952) 
[ 1152.640381] __napi_poll.constprop.0 (net/core/dev.c:6551) 
[ 1152.640755] net_rx_action (net/core/dev.c:6622 net/core/dev.c:6753) 
[ 1152.641051] __do_softirq (kernel/softirq.c:553) 
[ 1152.641343] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1152.641728] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 1152.642033] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1152.642365] kthread (kernel/kthread.c:388) 
[ 1152.642631] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1152.642947] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1152.643232] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested