======================================
| [ 1899.039008][ C2] #6: ffffffffa0d447e0 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5729 (discriminator 16)) 
| [ 1899.039562][ C2] #7: ffffffffa0d447e0 (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) 
| [ 1899.040095][    C2]
| [ 1899.040095][    C2] stack backtrace:
[ 1899.040843][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1899.041481][    C2] Call Trace:
[ 1899.041657][    C2]  <TASK>
[ 1899.041826][ C2] dump_stack_lvl (lib/dump_stack.c:107) 
[ 1899.042075][ C2] validate_chain (kernel/locking/lockdep.c:3859) 
[ 1899.042336][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 1899.042621][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 1899.042882][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 1899.043126][ C2] __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 1899.043389][ C2] ? lock_downgrade (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:103 kernel/locking/lockdep.c:5653) 
[ 1899.043656][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 1899.043899][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 1899.044182][ C2] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1899.044446][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 1899.044755][ C2] ? __pfx_sk_filter_trim_cap (net/core/filter.c:130) 
[ 1899.045053][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1899.045313][ C2] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1899.045568][ C2] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) 
[ 1899.045841][ C2] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1899.046099][ C2] tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1899.046345][ C2] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2162) 
[ 1899.046604][ C2] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 1899.046885][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 1899.047194][ C2] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) 
[ 1899.047490][ C2] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1899.047781][ C2] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 1899.048039][ C2] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 1899.048322][ C2] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) 
[ 1899.048660][ C2] ip_rcv (./include/net/dst.h:461 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 1899.048880][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 1899.049133][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 1899.049413][ C2] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5729 (discriminator 16)) 
[ 1899.049729][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 1899.049970][ C2] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[ 1899.050285][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5535) 
[ 1899.050632][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 1899.050880][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1899.051136][ C2] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5729 (discriminator 16)) 
[ 1899.051452][ C2] netif_receive_skb_internal (net/core/dev.c:5742) 
[ 1899.051746][ C2] ? __pfx_netif_receive_skb_internal (net/core/dev.c:5721) 
[ 1899.052078][ C2] ? __copy_skb_header (./include/net/dst.h:290 net/core/skbuff.c:1446) 
[ 1899.052355][ C2] ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1517 (discriminator 4)) 
[ 1899.052599][ C2] netif_receive_skb (net/core/dev.c:5801) 
[ 1899.052865][ C2] tcf_mirred_to_dev (net/sched/act_mirred.c:249 net/sched/act_mirred.c:324) act_mirred
[ 1899.053200][ C2] ? __pfx_tcf_skbedit_act (net/sched/act_skbedit.c:43) act_skbedit
[ 1899.053553][ C2] tcf_mirred_act (net/sched/act_mirred.c:459 (discriminator 2)) act_mirred
[ 1899.053870][ C2] tcf_action_exec.part.0 (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100) 
[ 1899.054158][ C2] fl_classify (net/sched/cls_flower.c:345) cls_flower
[ 1899.054462][ C2] ? __pfx_fl_classify (net/sched/cls_flower.c:316) cls_flower
[ 1899.054789][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 1899.055068][ C2] ? check_irq_usage (kernel/locking/lockdep.c:2823) 
[ 1899.055334][ C2] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) 
[ 1899.055624][ C2] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 1899.055845][ C2] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) 
[ 1899.056131][ C2] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 1899.056352][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 1899.056629][ C2] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 1899.056928][ C2] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 1899.057211][ C2] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) 
[ 1899.057515][ C2] __tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734) 
[ 1899.057772][ C2] tcf_classify (net/sched/cls_api.c:1830) 
[ 1899.058020][ C2] ? __pfx_tcf_classify (net/sched/cls_api.c:1779) 
[ 1899.058297][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 1899.058574][ C2] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:802 net/core/dev.c:4284) 
[ 1899.058848][ C2] tc_run (net/core/dev.c:3945) 
[ 1899.059074][ C2] ? __pfx_tc_run (net/core/dev.c:3929) 
[ 1899.059326][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1899.059583][ C2] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:802 net/core/dev.c:4284) 
[ 1899.059863][ C2] __dev_queue_xmit (net/core/dev.c:4069 net/core/dev.c:4301) 
[ 1899.060137][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 1899.060386][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 1899.060629][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4268) 
[ 1899.060930][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 1899.061292][ C2] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:772 ./include/net/neighbour.h:496) 
[ 1899.061561][ C2] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 1899.061831][ C2] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 1899.062132][ C2] ? __ip_finish_output (net/ipv4/ip_output.c:256 net/ipv4/ip_output.c:308 net/ipv4/ip_output.c:295) 
[ 1899.062417][ C2] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 1899.062655][ C2] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 1899.062913][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 1899.063226][ C2] ? ip_local_out (./include/linux/skbuff.h:1136 ./include/net/dst.h:451 net/ipv4/ip_output.c:129) 
[ 1899.063476][ C2] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 1899.063738][ C2] ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1517 (discriminator 4)) 
[ 1899.063996][ C2] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 1899.064277][ C2] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) 
[ 1899.064577][ C2] ? tcp_small_queue_check.isra.0 (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/ipv4/tcp_output.c:2623) 
[ 1899.064903][ C2] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 1899.065172][ C2] ? ipv4_mtu (./include/net/net_namespace.h:385 ./include/linux/netdevice.h:2651 ./include/net/ip.h:465 net/ipv4/route.c:1326) 
[ 1899.065402][ C2] ? __pfx_tcp_write_xmit (net/ipv4/tcp_output.c:2702) 
[ 1899.065687][ C2] ? __pfx_tcp_current_mss (net/ipv4/tcp_output.c:1853) 
[ 1899.065972][ C2] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 1899.066272][ C2] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6870) 
[ 1899.066568][ C2] ? tcp_v4_rcv (./include/linux/skbuff.h:1624 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2326) 
[ 1899.066826][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 1899.067076][ C2] ? __lock_acquired (kernel/locking/lockdep.c:339 kernel/locking/lockdep.c:5991) 
[ 1899.067335][ C2] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6620) 
[ 1899.067643][ C2] ? __pfx___lock_acquired (kernel/locking/lockdep.c:5959) 
[ 1899.067923][ C2] ? __pfx_do_raw_spin_trylock (kernel/locking/spinlock_debug.c:122) 
[ 1899.068231][ C2] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[ 1899.068478][ C2] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2329) 
[ 1899.068724][ C2] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2162) 
[ 1899.068989][ C2] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 1899.069261][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 1899.069568][ C2] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) 
[ 1899.069856][ C2] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 1899.070155][ C2] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 1899.070417][ C2] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 1899.070715][ C2] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) 
[ 1899.071056][ C2] ip_rcv (./include/net/dst.h:461 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 1899.071274][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 1899.071514][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 1899.071788][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5983) 
[ 1899.072062][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 1899.072308][ C2] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) 
[ 1899.072632][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5535) 
[ 1899.072976][ C2] ? __pfx_do_raw_spin_trylock (kernel/locking/spinlock_debug.c:122) 
[ 1899.073289][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1899.073537][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5983) 
[ 1899.073804][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5985) 
[ 1899.074062][ C2] __napi_poll.constprop.0 (net/core/dev.c:6585) 
[ 1899.074360][ C2] net_rx_action (net/core/dev.c:6653 net/core/dev.c:6786) 
[ 1899.074611][ C2] ? __pfx_net_rx_action (net/core/dev.c:6750) 
[ 1899.074888][ C2] ? __pfx___schedule (kernel/sched/core.c:6608) 
[ 1899.075156][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 1899.075439][ C2] __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554) 
[ 1899.075690][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:914) 
[ 1899.075973][ C2] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 1899.076219][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1899.076486][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1899.076778][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1899.077076][ C2] kthread (kernel/kthread.c:388) 
[ 1899.077291][ C2] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1899.077536][ C2] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1899.077774][ C2] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:validate_chain:__lock_acquire:_raw_spin_lock_nested