<div dir="ltr">I'm using a 7620n router(openwrt BB14.07 r43276) with a secondary SSID enabled, after running for sometime I found these trace information in system log. I remember there is already a ticket <a href="https://dev.openwrt.org/ticket/17032">https://dev.openwrt.org/ticket/17032</a> , I wonder if these two problems was caused by a same reason?<div><br></div><div>Here is the error log:</div><div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.350000] ------------[ cut here ]------------</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.360000] WARNING: at net/core/dev.c:2194 skb_warn_bad_offload+0xbc/0xe4()</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.370000] rt2800_wmac: caps=(0x0000000000006000, 0x0000000000000000) len=117 data_len=0 gso_size=51 gso_type=0 ip_summed=3</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.390000] Modules linked in: rt2800soc rt2800mmio rt2800lib pppoe ppp_async iptable_nat rt2x00soc rt2x00mmio rt2x00lib pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_nat_irc nf_nat_ftp nf_nat nf_defrag_ipv4 nf_conntrack_irc nf_conntrack_ftp iptable_raw iptable_mangle iptable_filter ipMon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.530000] CPU: 0 PID: 0 Comm: swapper Tainted: G W 3.10.49 #4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] Stack : 00000000 00000000 00000000 00000000 8031a35e 0000003d 802b6260 83246e18</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] 80276544 802b668b 00000000 8031381c 802b6260 83246e18 00000000 00000000</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] 00010000 80222e44 00000003 801883a4 8028c148 83246e18 80277c04 802ab9e4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 802ab970</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.540000] ...</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.620000] Call Trace:</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.620000] [<801c6848>] show_stack+0x48/0x70</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.630000] [<80233b24>] warn_slowpath_common+0x78/0xa8</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.640000] [<80233b80>] warn_slowpath_fmt+0x2c/0x38</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.650000] [<80223528>] skb_warn_bad_offload+0xbc/0xe4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.660000] [<801cf398>] skb_checksum_help+0x40/0x1c0</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.670000] [<8009e4d8>] dev_hard_start_xmit+0x2cc/0x470</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.680000] [<801afec0>] sch_direct_xmit+0x60/0x254</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.690000] [<8009fa54>] dev_queue_xmit+0x258/0x494</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.700000] [<80072a20>] br_dev_queue_push_xmit+0x6c/0x80</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.710000] [<80072df4>] br_dev_xmit+0x1cc/0x200</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.720000] [<8009e4f8>] dev_hard_start_xmit+0x2ec/0x470</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.730000] [<8009fbc4>] dev_queue_xmit+0x3c8/0x494</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.740000] [<80109638>] ip_finish_output+0x398/0x42c</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.750000] [<800414cc>] __netif_receive_skb_core+0x5ac/0x6a4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.760000] [<8013c0a0>] lro_flush+0x170/0x1b8</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.770000] [<8013c12c>] lro_flush_all+0x44/0x64</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.780000] [<800cc0d4>] fe_poll_rx+0x2a0/0x314</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.790000] [<80159214>] net_rx_action+0x10c/0x1e0</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.800000] [<8003035c>] __do_softirq+0xd0/0x1bc</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.810000] [<800b84b0>] do_softirq+0x48/0x68</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.820000] [<801174cc>] irq_exit+0x54/0x70</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.820000] [<80004830>] ret_from_irq+0x0/0x4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.830000] [<80199fec>] r4k_wait_irqoff+0x18/0x1c</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.840000] [<80090d60>] cpu_startup_entry+0xa4/0x104</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.850000] [<802c7910>] start_kernel+0x38c/0x3a4</div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.860000] </div><div>Mon Nov 24 07:25:31 2014 kern.warn kernel: [ 2810.870000] ---[ end trace 6faa69b048fb57b1 ]---</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.700000] ------------[ cut here ]------------</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.710000] WARNING: at net/core/dev.c:2194 skb_warn_bad_offload+0xbc/0xe4()</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.720000] rt2800_wmac: caps=(0x0000000000006000, 0x0000000000000000) len=117 data_len=0 gso_size=51 gso_type=0 ip_summed=3</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.740000] Modules linked in: rt2800soc rt2800mmio rt2800lib pppoe ppp_async iptable_nat rt2x00soc rt2x00mmio rt2x00lib pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_nat_irc nf_nat_ftp nf_nat nf_defrag_ipv4 nf_conntrack_irc nf_conntrack_ftp iptable_raw iptable_mangle iptable_filter ipMon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.880000] CPU: 0 PID: 0 Comm: swapper Tainted: G W 3.10.49 #4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] Stack : 00000000 00000000 00000000 00000000 8031a35e 0000003d 802b6260 83246e18</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] 80276544 802b668b 00000000 8031381c 802b6260 83246e18 00000000 00000000</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] 00010000 80222e44 00000003 801883a4 8028c148 83246e18 80277c04 802ab9e4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 802ab970</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.900000] ...</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.970000] Call Trace:</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.970000] [<801c6848>] show_stack+0x48/0x70</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.980000] [<80233b24>] warn_slowpath_common+0x78/0xa8</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2821.990000] [<80233b80>] warn_slowpath_fmt+0x2c/0x38</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.000000] [<80223528>] skb_warn_bad_offload+0xbc/0xe4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.010000] [<801cf398>] skb_checksum_help+0x40/0x1c0</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.020000] [<8009e4d8>] dev_hard_start_xmit+0x2cc/0x470</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.030000] [<801afec0>] sch_direct_xmit+0x60/0x254</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.040000] [<8009fa54>] dev_queue_xmit+0x258/0x494</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.050000] [<80072a20>] br_dev_queue_push_xmit+0x6c/0x80</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.060000] [<80072df4>] br_dev_xmit+0x1cc/0x200</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.070000] [<8009e4f8>] dev_hard_start_xmit+0x2ec/0x470</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.080000] [<8009fbc4>] dev_queue_xmit+0x3c8/0x494</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.090000] [<80109650>] ip_finish_output+0x3b0/0x42c</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.100000] [<800414cc>] __netif_receive_skb_core+0x5ac/0x6a4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.110000] [<8013c0a0>] lro_flush+0x170/0x1b8</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.120000] [<8013c12c>] lro_flush_all+0x44/0x64</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.130000] [<800cc0d4>] fe_poll_rx+0x2a0/0x314</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.140000] [<80159214>] net_rx_action+0x10c/0x1e0</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.150000] [<8003035c>] __do_softirq+0xd0/0x1bc</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.160000] [<800b84b0>] do_softirq+0x48/0x68</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.170000] [<801174cc>] irq_exit+0x54/0x70</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.180000] [<80004830>] ret_from_irq+0x0/0x4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.180000] [<80199fec>] r4k_wait_irqoff+0x18/0x1c</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.190000] [<80090d60>] cpu_startup_entry+0xa4/0x104</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.200000] [<802c7910>] start_kernel+0x38c/0x3a4</div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.210000] </div><div>Mon Nov 24 07:25:42 2014 kern.warn kernel: [ 2822.220000] ---[ end trace 6faa69b048fb57b2 ]---</div></div><div><br></div><div><br></div><div>Thanks~</div><div><div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><span style="color:rgb(136,136,136)">Best Regards,</span><div style="color:rgb(136,136,136)"><br>Zhao Zhang,<br>Undergraduate from </div><div style="color:rgb(136,136,136)">Dept. of Computer Science & Technology,<br>Ocean University of China,<br>Qingdao, China, 266100</div><div style="color:rgb(136,136,136)">Phone 18678430893</div></div></div>
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