我嵌入式linxu，遭到syn攻击出现下面现象

Question

我的嵌入式linux系统具有route功能，在用iptables设置NAT后可以实现IP转发，但在遭到SYN攻击后系统坚持一两分钟就崩溃了。请各位高手提供一点参考意见。能让我大概知道什么地方的原因，先谢谢了！下面是出错现象：

# Unable to handle kernel paging request at virtual address 00000004, epc == 801
1feb8, ra == 801dae84
Oops in fault.c:do_page_fault, line 204:
$0 : 00000000 1000ff00 0000003f 00000000 80354640 00000000 1000ff00 00000000
$8 : 00040000 00040000 005e0000 8030c81e 8030c81e 00000001 810ade48 00000000
$16: 80211654 8046f7e8 00000020 00000610 0000000c 00000000 802119c0 b8001c00
$24: 00000000 2abf51f0                   810ac000 810adbb8 00007dd1 801dae84
Hi : 0000000c
Lo : 00000000
epc  : 8011feb8    Not tainted
Status: 1000ff00
Cause : 1000000c
Process ksoftirqd_CPU0 (pid: 3, stackpage=810ac000)
Stack: 810adc18 805d36c0 80483c20 8018af9c 80211654 803d13b0 0000003e 80211780
       801dae84 00000006 80211888 00000401 8018ac28 8018a988 00420320 00000000
       b8001c00 00670040 80211654 802119c0 0000000c 0000000d 802119c0 b8001c00
       801db160 01000000 00000030 00000000 3f57fdd6 c0a8792e 80211654 8046f7e8
       00000020 00000610 800b93ec 00000000 803f5090 00000000 80202c08 80202c08
       801838c4 ...
Call Trace: [<8018af9c>;] [<801dae84>;] [<8018ac28>;] [<8018a988>;] [<801db160>;] [<8
00b93ec>;]
[<801838c4>;] [<8018b1bc>;] [<801dae84>;] [<80021f54>;] [<80180f34>;] [<80178594>;]
[<801dae84>;] [<8011feb8>;] [<801806c8>;] [<80143778>;] [<801dae84>;] [<801daf8c>;]
[<8013f2b0>;] [<8013f214>;] [<801db160>;] [<8013f214>;] [<800b93ec>;] [<8013f120>;]
[<80126b9c>;] [<8013c910>;] [<80031d8c>;] [<8013d1e0>;] [<8002d7c4>;] [<80126b9c>;]
[<8002d5b4>;] [<8002cf6c>;] [<8002da84>;] [<8002da9c>;] [<801a8d34>;] [<8002d9cc>;]
[<80018e04>;] [<80018df4>;]

Code: 8c830000  2442ffff  ae220008 <ac710004>; ae230000  ac800000  ac800004  ac80
0008  00802821
Unable to handle kernel paging request at virtual address 00000004, epc == 8011f
eb8, ra == 801dae84
Oops in fault.c:do_page_fault, line 204:
$0 : 00000000 1000ff00 0000003d 00000000 80354640 00000000 1000ff00 00000001
$8 : 00020000 00020000 001e0000 802066f0 8045e569 fffffffe 810ad8bd ffffffff
$16: 80211420 8046f7e8 00000020 00000610 00000018 00000000 80211888 b8001800
$24: 00000010 00000005                   810ac000 810ad5e0 00007dd1 801dae84
Hi : 00000018
Lo : 00000000
epc  : 8011feb8    Not tainted
Status: 1000ff00
Cause : 1000000c
Process ksoftirqd_CPU0 (pid: 3, stackpage=810ac000)
Stack: 280be903 352d7808 c1d790c4 ac3fd688 80211420 810fcda0 0000005c 8021157c
       801dae84 c023f76f 6d72631c 471fd932 db3cb250 94a74b47 00600720 f76755de
       b8001800 00670040 80211420 80211888 0000000c 00000000 802119c0 b8001c00
       801db160 5799a6f2 6f47134a 3e22c347 611fd2cf 9722bb48 80211654 8046f7e8
       00000020 00000610 800b92b4 9a21915d f48feef9 83ed3df3 814d1a0a b76961bb
       9b8e3b32 ...
Call Trace: [<801dae84>;] [<c023f76f>;] [<801db160>;] [<800b92b4>;] [<801dae84>;] [<8
0021f54>;]
[<801dae84>;] [<8011feb8>;] [<801dae84>;] [<801da5b4>;] [<801db160>;] [<800b883c>;]
[<801da5b4>;] [<800b93ec>;] [<8018b770>;] [<801da1a8>;] [<801da06c>;] [<80026f40>;]
[<801da1a8>;] [<80026f40>;] [<80026fe0>;] [<801a7750>;] [<800b917c>;] [<80026fe0>;]
[<801a7750>;] [<8001bba0>;] [<8001bbb4>;] [<801a57d4>;] [<800210b8>;] [<801a76e8>;]
[<8011feb8>;] [<801dae84>;] [<80182fdc>;] [<801261d0>;] [<8011ff34>;] [<800b917c>;]
[<801261d0>;] [<8011ff34>;] [<8017a150>;] [<8017a140>;] [<801da5b4>;] ...

Code: 8c830000  2442ffff  ae220008 <ac710004>; ae230000  ac800000  ac800004  ac80
0008  00802821
..........................................

Answer 1

说清楚点