Same output on 4.10.0-42:
Jul 20 16:04:19 ubuntu kernel: [832874.880924] nf_hook_slow+0x2a/0xb0 Jul 20 16:04:19 ubuntu kernel: [832874.880926] ? __dev_queue_xmit+0x276/0x690 Jul 20 16:04:19 ubuntu kernel: [832874.880928] br_forward_finish+0x83/0xb0 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880931] ? br_fdb_external_learn_del+0x120/0x120 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880932] br_nf_hook_thresh+0xac/0xc0 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880934] ? skb_free_head+0x21/0x30 Jul 20 16:04:19 ubuntu kernel: [832874.880935] br_nf_forward_finish+0xe0/0x1b0 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880938] ? br_dev_queue_push_xmit+0x150/0x150 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880939] br_nf_forward_ip+0x378/0x450 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880946] ? tcp_in_window+0x109/0xa00 [nf_conntrack] Jul 20 16:04:19 ubuntu kernel: [832874.880947] nf_hook_slow+0x2a/0xb0 Jul 20 16:04:19 ubuntu kernel: [832874.880950] __br_forward+0xc6/0x1e0 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880953] ? br_dev_queue_push_xmit+0x150/0x150 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880955] br_forward+0xa7/0xb0 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880958] br_handle_frame_finish+0x263/0x540 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880961] ? udp_error+0xe2/0x1e0 [nf_conntrack] Jul 20 16:04:19 ubuntu kernel: [832874.880964] ? br_pass_frame_up+0x150/0x150 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880965] br_nf_hook_thresh+0xac/0xc0 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880967] br_nf_pre_routing_finish+0x196/0x330 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880970] ? br_pass_frame_up+0x150/0x150 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880972] ? ipv4_conntrack_in+0x1c/0x20 [nf_conntrack_ipv4] Jul 20 16:04:19 ubuntu kernel: [832874.880973] br_nf_pre_routing+0x2d6/0x430 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880974] ? br_nf_forward_arp+0x260/0x260 [br_netfilter] Jul 20 16:04:19 ubuntu kernel: [832874.880976] nf_hook_slow+0x2a/0xb0 Jul 20 16:04:19 ubuntu kernel: [832874.880978] br_handle_frame+0x1bc/0x2d0 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880981] ? br_pass_frame_up+0x150/0x150 [bridge] Jul 20 16:04:19 ubuntu kernel: [832874.880982] __netif_receive_skb_core+0x323/0xa70 Jul 20 16:04:19 ubuntu kernel: [832874.880984] __netif_receive_skb+0x18/0x60 Jul 20 16:04:19 ubuntu kernel: [832874.880985] process_backlog+0x9f/0x140 Jul 20 16:04:19 ubuntu kernel: [832874.880987] net_rx_action+0x23e/0x390 Jul 20 16:04:19 ubuntu kernel: [832874.880989] __do_softirq+0xed/0x297 Jul 20 16:04:19 ubuntu kernel: [832874.880991] do_softirq_own_stack+0x1c/0x30 Jul 20 16:04:19 ubuntu kernel: [832874.880991] </IRQ> Jul 20 16:04:19 ubuntu kernel: [832874.880993] do_softirq.part.18+0x41/0x50 Jul 20 16:04:19 ubuntu kernel: [832874.880994] __local_bh_enable_ip+0x7d/0x80 Jul 20 16:04:19 ubuntu kernel: [832874.880995] ip_finish_output2+0x193/0x390 Jul 20 16:04:19 ubuntu kernel: [832874.880997] ip_finish_output+0x176/0x270 Jul 20 16:04:19 ubuntu kernel: [832874.880998] ip_output+0x76/0xe0 Jul 20 16:04:19 ubuntu kernel: [832874.880999] ? ip_fragment.constprop.50+0x80/0x80 Jul 20 16:04:19 ubuntu kernel: [832874.881000] ip_local_out+0x35/0x40 Jul 20 16:04:19 ubuntu kernel: [832874.881001] ip_send_skb+0x19/0x40 Jul 20 16:04:19 ubuntu kernel: [832874.881002] udp_send_skb+0xae/0x280 Jul 20 16:04:19 ubuntu kernel: [832874.881003] udp_sendmsg+0x357/0x9c0 Jul 20 16:04:19 ubuntu kernel: [832874.881005] ? ip_reply_glue_bits+0x50/0x50 Jul 20 16:04:19 ubuntu kernel: [832874.881007] ? aa_sock_msg_perm+0x61/0x150 Jul 20 16:04:19 ubuntu kernel: [832874.881009] inet_sendmsg+0x31/0xb0 Jul 20 16:04:19 ubuntu kernel: [832874.881010] sock_sendmsg+0x38/0x50 Jul 20 16:04:19 ubuntu kernel: [832874.881012] SYSC_sendto+0x101/0x190 Jul 20 16:04:19 ubuntu kernel: [832874.881014] ? syscall_trace_enter+0x298/0x2f0 Jul 20 16:04:19 ubuntu kernel: [832874.881015] SyS_sendto+0xe/0x10 Jul 20 16:04:19 ubuntu kernel: [832874.881016] do_syscall_64+0x5b/0xc0 Jul 20 16:04:19 ubuntu kernel: [832874.881018] entry_SYSCALL64_slow_path+0x25/0x25 Jul 20 16:04:19 ubuntu kernel: [832874.881019] RIP: 0033:0x7fba4961cad3 Jul 20 16:04:19 ubuntu kernel: [832874.881020] RSP: 002b:00007fb9def7e960 EFLAGS: 00000293 ORIG_RAX: 000000000000002c Jul 20 16:04:19 ubuntu kernel: [832874.881021] RAX: ffffffffffffffda RBX: 00007fba06103a50 RCX: 00007fba4961cad3 Jul 20 16:04:19 ubuntu kernel: [832874.881022] RDX: 0000000000000cda RSI: 00007fba4a30007f RDI: 000000000000000f Jul 20 16:04:19 ubuntu kernel: [832874.881022] RBP: 0000000000000cda R08: 00007fb9def7e9c0 R09: 0000000000000010 Jul 20 16:04:19 ubuntu kernel: [832874.881023] R10: 0000000000000000 R11: 0000000000000293 R12: fffffffffffffff9 Jul 20 16:04:19 ubuntu kernel: [832874.881024] R13: 00007fba4a30007f R14: 00007fba061037d0 R15: 0000283000005063 Jul 20 16:04:19 ubuntu kernel: [832874.881027] ---[ end trace 79153334c5df07db ]---
Same output on 4.10.0-42:
Jul 20 16:04:19 ubuntu kernel: [832874.880924] nf_hook_ slow+0x2a/ 0xb0 xmit+0x276/ 0x690 finish+ 0x83/0xb0 [bridge] external_ learn_del+ 0x120/0x120 [bridge] thresh+ 0xac/0xc0 [br_netfilter] head+0x21/ 0x30 finish+ 0xe0/0x1b0 [br_netfilter] queue_push_ xmit+0x150/ 0x150 [bridge] ip+0x378/ 0x450 [br_netfilter] window+ 0x109/0xa00 [nf_conntrack] slow+0x2a/ 0xb0 0xc6/0x1e0 [bridge] queue_push_ xmit+0x150/ 0x150 [bridge] 0xa7/0xb0 [bridge] frame_finish+ 0x263/0x540 [bridge] 0xe2/0x1e0 [nf_conntrack] frame_up+ 0x150/0x150 [bridge] thresh+ 0xac/0xc0 [br_netfilter] routing_ finish+ 0x196/0x330 [br_netfilter] frame_up+ 0x150/0x150 [bridge] in+0x1c/ 0x20 [nf_conntrack_ipv4] routing+ 0x2d6/0x430 [br_netfilter] arp+0x260/ 0x260 [br_netfilter] slow+0x2a/ 0xb0 frame+0x1bc/ 0x2d0 [bridge] frame_up+ 0x150/0x150 [bridge] receive_ skb_core+ 0x323/0xa70 receive_ skb+0x18/ 0x60 backlog+ 0x9f/0x140 action+ 0x23e/0x390 0xed/0x297 own_stack+ 0x1c/0x30 part.18+ 0x41/0x50 bh_enable_ ip+0x7d/ 0x80 output2+ 0x193/0x390 output+ 0x176/0x270 constprop. 50+0x80/ 0x80 out+0x35/ 0x40 skb+0x19/ 0x40 skb+0xae/ 0x280 0x357/0x9c0 glue_bits+ 0x50/0x50 msg_perm+ 0x61/0x150 0x31/0xb0 0x38/0x50 0x101/0x190 trace_enter+ 0x298/0x2f0 64+0x5b/ 0xc0 _slow_path+ 0x25/0x25 f7e960 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
Jul 20 16:04:19 ubuntu kernel: [832874.880926] ? __dev_queue_
Jul 20 16:04:19 ubuntu kernel: [832874.880928] br_forward_
Jul 20 16:04:19 ubuntu kernel: [832874.880931] ? br_fdb_
Jul 20 16:04:19 ubuntu kernel: [832874.880932] br_nf_hook_
Jul 20 16:04:19 ubuntu kernel: [832874.880934] ? skb_free_
Jul 20 16:04:19 ubuntu kernel: [832874.880935] br_nf_forward_
Jul 20 16:04:19 ubuntu kernel: [832874.880938] ? br_dev_
Jul 20 16:04:19 ubuntu kernel: [832874.880939] br_nf_forward_
Jul 20 16:04:19 ubuntu kernel: [832874.880946] ? tcp_in_
Jul 20 16:04:19 ubuntu kernel: [832874.880947] nf_hook_
Jul 20 16:04:19 ubuntu kernel: [832874.880950] __br_forward+
Jul 20 16:04:19 ubuntu kernel: [832874.880953] ? br_dev_
Jul 20 16:04:19 ubuntu kernel: [832874.880955] br_forward+
Jul 20 16:04:19 ubuntu kernel: [832874.880958] br_handle_
Jul 20 16:04:19 ubuntu kernel: [832874.880961] ? udp_error+
Jul 20 16:04:19 ubuntu kernel: [832874.880964] ? br_pass_
Jul 20 16:04:19 ubuntu kernel: [832874.880965] br_nf_hook_
Jul 20 16:04:19 ubuntu kernel: [832874.880967] br_nf_pre_
Jul 20 16:04:19 ubuntu kernel: [832874.880970] ? br_pass_
Jul 20 16:04:19 ubuntu kernel: [832874.880972] ? ipv4_conntrack_
Jul 20 16:04:19 ubuntu kernel: [832874.880973] br_nf_pre_
Jul 20 16:04:19 ubuntu kernel: [832874.880974] ? br_nf_forward_
Jul 20 16:04:19 ubuntu kernel: [832874.880976] nf_hook_
Jul 20 16:04:19 ubuntu kernel: [832874.880978] br_handle_
Jul 20 16:04:19 ubuntu kernel: [832874.880981] ? br_pass_
Jul 20 16:04:19 ubuntu kernel: [832874.880982] __netif_
Jul 20 16:04:19 ubuntu kernel: [832874.880984] __netif_
Jul 20 16:04:19 ubuntu kernel: [832874.880985] process_
Jul 20 16:04:19 ubuntu kernel: [832874.880987] net_rx_
Jul 20 16:04:19 ubuntu kernel: [832874.880989] __do_softirq+
Jul 20 16:04:19 ubuntu kernel: [832874.880991] do_softirq_
Jul 20 16:04:19 ubuntu kernel: [832874.880991] </IRQ>
Jul 20 16:04:19 ubuntu kernel: [832874.880993] do_softirq.
Jul 20 16:04:19 ubuntu kernel: [832874.880994] __local_
Jul 20 16:04:19 ubuntu kernel: [832874.880995] ip_finish_
Jul 20 16:04:19 ubuntu kernel: [832874.880997] ip_finish_
Jul 20 16:04:19 ubuntu kernel: [832874.880998] ip_output+0x76/0xe0
Jul 20 16:04:19 ubuntu kernel: [832874.880999] ? ip_fragment.
Jul 20 16:04:19 ubuntu kernel: [832874.881000] ip_local_
Jul 20 16:04:19 ubuntu kernel: [832874.881001] ip_send_
Jul 20 16:04:19 ubuntu kernel: [832874.881002] udp_send_
Jul 20 16:04:19 ubuntu kernel: [832874.881003] udp_sendmsg+
Jul 20 16:04:19 ubuntu kernel: [832874.881005] ? ip_reply_
Jul 20 16:04:19 ubuntu kernel: [832874.881007] ? aa_sock_
Jul 20 16:04:19 ubuntu kernel: [832874.881009] inet_sendmsg+
Jul 20 16:04:19 ubuntu kernel: [832874.881010] sock_sendmsg+
Jul 20 16:04:19 ubuntu kernel: [832874.881012] SYSC_sendto+
Jul 20 16:04:19 ubuntu kernel: [832874.881014] ? syscall_
Jul 20 16:04:19 ubuntu kernel: [832874.881015] SyS_sendto+0xe/0x10
Jul 20 16:04:19 ubuntu kernel: [832874.881016] do_syscall_
Jul 20 16:04:19 ubuntu kernel: [832874.881018] entry_SYSCALL64
Jul 20 16:04:19 ubuntu kernel: [832874.881019] RIP: 0033:0x7fba4961cad3
Jul 20 16:04:19 ubuntu kernel: [832874.881020] RSP: 002b:00007fb9de
Jul 20 16:04:19 ubuntu kernel: [832874.881021] RAX: ffffffffffffffda RBX: 00007fba06103a50 RCX: 00007fba4961cad3
Jul 20 16:04:19 ubuntu kernel: [832874.881022] RDX: 0000000000000cda RSI: 00007fba4a30007f RDI: 000000000000000f
Jul 20 16:04:19 ubuntu kernel: [832874.881022] RBP: 0000000000000cda R08: 00007fb9def7e9c0 R09: 0000000000000010
Jul 20 16:04:19 ubuntu kernel: [832874.881023] R10: 0000000000000000 R11: 0000000000000293 R12: fffffffffffffff9
Jul 20 16:04:19 ubuntu kernel: [832874.881024] R13: 00007fba4a30007f R14: 00007fba061037d0 R15: 0000283000005063
Jul 20 16:04:19 ubuntu kernel: [832874.881027] ---[ end trace 79153334c5df07db ]---