Здравствуйте, уважаемые форумчане!
В системном логе (messages) появились странные сообщения :
Sep 2 13:22:20 kernel: WARNING: at net/ipv4/tcp_output.c:1804 tcp_simple_retransmit()
Sep 2 13:22:20 kernel: [<c002a9b0>] (dump_stack+0x0/0x14) from [<c029c578>] (tcp_simple_retransmit+0xfc/0x194)
Sep 2 13:22:20 kernel: [<c029c47c>] (tcp_simple_retransmit+0x0/0x194) from [<c02a0c04>] (tcp_v4_err+0x404/0x5c4)
Sep 2 13:22:20 kernel: r5:cb5676a0 r4:cf444080
Sep 2 13:22:20 kernel: [<c02a0800>] (tcp_v4_err+0x0/0x5c4) from [<c02a96d8>] (icmp_unreach+0x2d0/0x314)
Sep 2 13:22:20 kernel: [<c02a9408>] (icmp_unreach+0x0/0x314) from [<c02a8c44>] (icmp_rcv+0x134/0x168)
Sep 2 13:22:20 kernel: [<c02a8b10>] (icmp_rcv+0x0/0x168) from [<c0284864>] (ip_local_deliver_finish+0x104/0x188)
Sep 2 13:22:20 kernel: r5:00000000 r4:c42bd240
Sep 2 13:22:20 kernel: [<c0284760>] (ip_local_deliver_finish+0x0/0x188) from [<c0284d1c>] (ip_local_deliver+0x94/0xa8)
Sep 2 13:22:20 kernel: r7:c0400138 r6:cfca9000 r5:c0401308 r4:c42bd240
Sep 2 13:22:20 kernel: [<c0284c88>] (ip_local_deliver+0x0/0xa8) from [<c028472c>] (ip_rcv_finish+0x2b8/0x2ec)
Sep 2 13:22:20 kernel: r4:cb5a0820
Sep 2 13:22:20 kernel: [<c0284474>] (ip_rcv_finish+0x0/0x2ec) from [<c0284c4c>] (ip_rcv+0x270/0x2ac)
Sep 2 13:22:20 kernel: [<c02849dc>] (ip_rcv+0x0/0x2ac) from [<c026b780>] (netif_receive_skb+0x25c/0x284)
Sep 2 13:22:21 kernel: r6:00000008 r5:c42bd240 r4:cfca9000
Sep 2 13:22:21 kernel: [<c026b524>] (netif_receive_skb+0x0/0x284) from [<c01bc3c4>] (eth_poll+0x554/0x854)
Sep 2 13:22:21 kernel: r8:cf091844 r7:cfca9000 r6:cec2bb40 r5:2fc3d26e r4:c42bd240
Sep 2 13:22:21 kernel: [<c01bbe70>] (eth_poll+0x0/0x854) from [<c026d54c>] (net_rx_action+0x58/0x1c8)
Sep 2 13:22:21 kernel: [<c026d4f4>] (net_rx_action+0x0/0x1c8) from [<c005b884>] (__do_softirq+0x60/0xc8)
Sep 2 13:22:21 kernel: [<c005b824>] (__do_softirq+0x0/0xc8) from [<c005bc34>] (irq_exit+0x48/0x50)
Sep 2 13:22:21 kernel: r7:00000152 r6:00000000 r5:c03a0748 r4:0000000b
Sep 2 13:22:21 kernel: [<c005bbec>] (irq_exit+0x0/0x50) from [<c0025048>] (__exception_text_start+0x48/0x60)
Sep 2 13:22:21 kernel: [<c0025000>] (__exception_text_start+0x0/0x60) from [<c0025d00>] (__irq_usr+0x40/0x180)
Sep 2 13:22:21 kernel: Exception stack(0xcf2f5fb0 to 0xcf2f5ff8)
Sep 2 13:22:21 kernel: 5fa0: 00355700 00000000 00000000 00355700
Sep 2 13:22:21 kernel: 5fc0: 0000012a 00000001 40cb4490 00000152 40378000 4035f8cc 00000000 40cb3b8c
Sep 2 13:22:21 kernel: 5fe0: 40cb3b90 40cb3b48 00039f08 00039e48 60000010 ffffffff
Sep 2 13:22:21 kernel: r7:00000152 r6:00000800 r5:0000001f r4:ffffffff
Sep 2 13:22:21 kernel: WARNING: at net/ipv4/tcp_input.c:2960 tcp_process_frto()
Sep 2 13:22:21 kernel: [<c002a9b0>] (dump_stack+0x0/0x14) from [<c0294c24>] (tcp_ack+0xa50/0x19bc)
Sep 2 13:22:21 kernel: [<c02941d4>] (tcp_ack+0x0/0x19bc) from [<c0298ab8>] (tcp_rcv_established+0x104/0x774)
Sep 2 13:22:21 kernel: [<c02989b4>] (tcp_rcv_established+0x0/0x774) from [<c029ef24>] (tcp_v4_do_rcv+0x30/0x3a4)
Sep 2 13:22:21 kernel: [<c029eef4>] (tcp_v4_do_rcv+0x0/0x3a4) from [<c02a1610>] (tcp_v4_rcv+0x84c/0x8bc)
Sep 2 13:22:21 kernel: [<c02a0dc4>] (tcp_v4_rcv+0x0/0x8bc) from [<c0284864>] (ip_local_deliver_finish+0x104/0x188)
Sep 2 13:22:21 kernel: [<c0284760>] (ip_local_deliver_finish+0x0/0x188) from [<c0284d1c>] (ip_local_deliver+0x94/0xa8)
Sep 2 13:22:21 kernel: r7:c0400138 r6:cfca9000 r5:c0401308 r4:c51342e0
Sep 2 13:22:21 kernel: [<c0284c88>] (ip_local_deliver+0x0/0xa8) from [<c028472c>] (ip_rcv_finish+0x2b8/0x2ec)
Sep 2 13:22:21 kernel: r4:cf284820
Sep 2 13:22:21 kernel: [<c0284474>] (ip_rcv_finish+0x0/0x2ec) from [<c0284c4c>] (ip_rcv+0x270/0x2ac)
Sep 2 13:22:21 kernel: [<c02849dc>] (ip_rcv+0x0/0x2ac) from [<c026b780>] (netif_receive_skb+0x25c/0x284)
Sep 2 13:22:21 kernel: r6:00000008 r5:c51342e0 r4:cfca9000
Sep 2 13:22:21 kernel: [<c026b524>] (netif_receive_skb+0x0/0x284) from [<c01bc3c4>] (eth_poll+0x554/0x854)
Sep 2 13:22:21 kernel: r8:cf091844 r7:cfca9000 r6:cfe19b20 r5:6f8416ce r4:c51342e0
Sep 2 13:22:21 kernel: [<c01bbe70>] (eth_poll+0x0/0x854) from [<c026d54c>] (net_rx_action+0x58/0x1c8)
Sep 2 13:22:21 kernel: [<c026d4f4>] (net_rx_action+0x0/0x1c8) from [<c005b884>] (__do_softirq+0x60/0xc8)
Sep 2 13:22:21 kernel: [<c005b824>] (__do_softirq+0x0/0xc8) from [<c005bc34>] (irq_exit+0x48/0x50)
Sep 2 13:22:21 kernel: r7:c0399d78 r6:00000000 r5:c03a0748 r4:0000000b
Sep 2 13:22:21 kernel: [<c005bbec>] (irq_exit+0x0/0x50) from [<c0025048>] (__exception_text_start+0x48/0x60)
Sep 2 13:22:21 kernel: [<c0025000>] (__exception_text_start+0x0/0x60) from [<c0025a30>] (__irq_svc+0x30/0x180)
Sep 2 13:22:21 kernel: Exception stack(0xc0397f60 to 0xc0397fa8)
Sep 2 13:22:21 kernel: 7f60: 00000000 0005397f 0005297f 60000013 c002792c c0396000 c002333c c0399d78
Sep 2 13:22:21 kernel: 7f80: f1020128 56251311 000202b0 c0397fbc 600000d3 c0397fa8 c0027974 c0027694
Sep 2 13:22:21 kernel: 7fa0: 60000013 ffffffff
Sep 2 13:22:21 kernel: r7:c0399d78 r6:00000800 r5:0000001f r4:ffffffff
Sep 2 13:22:21 kernel: [<c0027658>] (cpu_idle+0x0/0x58) from [<c02d473c>] (rest_init+0x54/0x64)
Sep 2 13:22:21 kernel: r5:c03b546c r4:c03c3e04
Sep 2 13:22:21 kernel: [<c02d46e8>] (rest_init+0x0/0x64) from [<c0008bf0>] (start_kernel+0x270/0x2c8)
Sep 2 13:22:21 kernel: [<c0008980>] (start_kernel+0x0/0x2c8) from [<00008034>] (0x8034)
Вопросы к знатокам: что сие означет? Как это лечить? И надо ли вообще? 
Заранее спасибо за ответ.