Roman Hoog Antink: netlink module (linux)

[Eddie Kohler]

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Date: Tue, 17 Dec 2002 10:57:18 -0800
From: Roman Hoog Antink <rhoogant at ee.ethz.ch>
To: click at amsterdam.lcs.mit.edu
Subject: {SPAM?} netlink module (linux)

  Hi,

I'm writing a netlink module for click (linux kernel environment). I'm 
not quiet experienced in kernel hacking. Whenever I try to handle a 
packet (skbuf) from click to a netlink socket (netlink_broadcast), I get a kernel oops.

Can anyone help me? Has anyone ever worked on the subject netlink & click?

ksymoops output: see below
source code: http://129.132.57.73/~roman/click/

Kernel: linux-2.4.18

Roman

Unable to handle kernel paging request at virtual address 9ae36a54
c01f93b3
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 9ae36a54   ebx: df1dc1e0   ecx: 00000000   edx: df1dc218
esi: d702d072   edi: d702d072   ebp: d836da40   esp: d7091eac
ds: 0018   es: 0018   ss: 0018
Process kclick (pid: 786, stackpage=d7091000)
Stack: d7fef5c0 00000000 c02098a9 d702d072 00000020 00000000 00000020 00000001 
       00000000 d705e360 df7224e0 00000001 d7091f1c e3397e95 d836da40 d702d072 
       00000000 00000001 00000020 c02b95d0 fffffffb 00000046 c011d399 00000000 
Call Trace: [] [] [] [] [] 
   [] [] [] [] [] 
Code: ff 00 8b 86 98 00 00 00 c6 46 19 01 85 c0 74 04 8b 00 ff 00 


>>EIP; c01f93b3    <=====

>>eax; 9ae36a54 Before first symbol
>>ebx; df1dc1e0 <_end+1eeee7fc/215ce67c>
>>edx; df1dc218 <_end+1eeee834/215ce67c>
>>esi; d702d072 <_end+16d3f68e/215ce67c>
>>edi; d702d072 <_end+16d3f68e/215ce67c>
>>ebp; d836da40 <_end+1808005c/215ce67c>
>>esp; d7091eac <_end+16da44c8/215ce67c>

Trace; c02098a9 
Trace; e3397e95 <[click]_ZN8IPFilter9Primitive8set_maskEjiP12ErrorHandler+355/440>
Trace; c011d399 
Trace; e3324ef0 <[snd].bss.end+1e91/2001>
Trace; e335c47d <[click]_ZN12IPAddressSet9list_copyEv+4d/60>
Trace; e3375b65 <[click]_ZN5Lexer23expand_compound_elementEiRK19VariableEnvironment+2a5/6e0>
Trace; e3338f54 <[snd-timer]snd_timer_proc_read+b4/1c0>
Trace; e3398b37 <[click]_ZN8IPFilter9Primitive5checkERKS0_P12ErrorHandler+5f7/600>
Trace; c01057a6 
Trace; e3398ab0 <[click]_ZN8IPFilter9Primitive5checkERKS0_P12ErrorHandler+570/600>

Code;  c01f93b3 
00000000 <_EIP>:
Code;  c01f93b3    <=====
   0:   ff 00                     incl   (%eax)   <=====
Code;  c01f93b5 
   2:   8b 86 98 00 00 00         mov    0x98(%esi),%eax
Code;  c01f93bb 
   8:   c6 46 19 01               movb   $0x1,0x19(%esi)
Code;  c01f93bf 
   c:   85 c0                     test   %eax,%eax
Code;  c01f93c1 
   e:   74 04                     je     14 <_EIP+0x14> c01f93c7 
Code;  c01f93c3 
  10:   8b 00                     mov    (%eax),%eax
Code;  c01f93c5 
  12:   ff 00                     incl   (%eax)








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