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Subject[Oops] Unable to handle kernel NULL pointer dereference

I ran into some trouble while compiling the pspell library that the
new version of Balsa requires - okay, so perhaps I was asking for
it :-) I ran the configure script fine, but a kernel oops occurred a
few lines into the "make" process. I gather that it might be
something to do with dodgy source code, but surely just compiling
source code should not produce an oops (there were no compiler
warnings until after the oops)?

The oops is not fatal; I was able to download, compile and install
the ksysmoops program to get the decoded oops message without having
to reboot. I rebooted the system and tried compiling from clean
sources again and got the same oops, so it seems to be repeatable on
my system.

If this is the wrong forum for such a message, please let me know!

My system is RH6.2, with various updates probably best described by
the output of the ver_linux script:

Linux xxxx 2.4.0-test9 #1 Sat Sep 16 17:11:06 BST 2000 i586 unknown
Kernel modules 2.3.14
Gnu C egcs-2.91.66
Linux C Library 2.1.3
Dynamic linker ldd (GNU libc) 2.1.3
Procps 2.0.7
Mount 2.10o
Net-tools 1.54
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded emu10k1 soundcore

kernel version 2.4.0-test9p1 with Rick van Riel's VM patch
System: P133 w/ 32Mb ram. More details available on request.

The decoded Oops message is below.

Unable to handle kernel NULL pointer dereference at virtual address
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c01527b9>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010202
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c1afc000
esi: 00000000 edi: 00000004 ebp: 00000000 esp: c14d7ee0
ds: 0018 es: 0018 ss: 0018
Process ar (pid: 13549, stackpage=c14d7000)
Stack: c14d7f24 c015357b 00000000 00000001 c14d7f54 000001f6 c0a51440

c0706019 c109aa50 c14d7f2c c14d7f24 00000013 c01363d8 00000001

c000d220 00000000 00000000 00000000 00000000 c012c1e7 c0a51440

Call Trace: [<c015357b>] [<c01363d8>] [<c012c1e7>] [<c01371a9>]
[<c012c23b>] [<c011d630>] [<c0108d8
Code: f6 43 34 40 74 07 31 c0 e9 f9 00 00 00 8b 53 48 85 d2 74 43

>>EIP; c01527b9 <check_idq+d/118> <=====
Trace; c015357b <dquot_transfer+28b/4c8>
Trace; c01363d8 <cached_lookup+10/54>
Trace; c012c1e7 <chown_common+ff/120>
Trace; c01371a9 <__user_walk+4d/58>
Trace; c012c23b <sys_chown+33/48>
Trace; c011d630 <sys_chown16+40/44>
Trace; c0108d83 <system_call+33/40>
Code; c01527b9 <check_idq+d/118>
00000000 <_EIP>:
Code; c01527b9 <check_idq+d/118> <=====
0: f6 43 34 40 testb $0x40,0x34(%ebx) <=====
Code; c01527bd <check_idq+11/118>
4: 74 07 je d <_EIP+0xd> c01527c6
Code; c01527bf <check_idq+13/118>
6: 31 c0 xor %eax,%eax
Code; c01527c1 <check_idq+15/118>
8: e9 f9 00 00 00 jmp 106 <_EIP+0x106> c01528bf
Code; c01527c6 <check_idq+1a/118>
d: 8b 53 48 mov 0x48(%ebx),%edx
Code; c01527c9 <check_idq+1d/118>
10: 85 d2 test %edx,%edx
Code; c01527cb <check_idq+1f/118>
12: 74 43 je 57 <_EIP+0x57> c0152810


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