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Subjectkernel oops
Date
Hello,
i am recently experiencing kernel errors with httpd process,
the software used:

apache 1.3.18 running in chroot environment,
self built kernel 2.4.10,
glibc 2.2.2, gcc version 2.96, binutils 2.10)

the problem is semi-repeatable, that is it happens almost always after a few
minutes of running
that httpd, but is triggered either by running CGI scripts or trigerring
apache 40x errors.

the hardware used is P200 MMX, 64 megz of ram, tx chipset

if you need any further information i will be happy to help,

ksymoops outputs:

Unable to handle kernel NULL pointer dereference at virtual address 0000000c
c011a112
*pde = 003a7067
Oops: 0000
CPU: 0
EIP: 0010:[<c011a112>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: 00000000 ebx: c3f58000 ecx: c0f5c220 edx: c1132000
esi: c0e1e000 edi: ffff0301 ebp: 0000000a esp: c0e1fee4
ds: 0018 es: 0018 ss: 0018
Process httpd (pid: 4063, stackpage=c0e1f000)
Stack: 00005941 ffffffff 00005941 00000003 00000001 bffffc48 c011a74d
0000000a
c0e1ff3c c3f58000 00000000 0009f8ab c0e1e000 c010f160 00005941
00000003
00000001 bffffc48 c011aee9 0000000a c0e1ff3c 00005941 0000000a
00000000
Call Trace: [<c011a74d>] [<c010f160>] [<c011aee9>] [<c013dea0>] [<c0106ca3>]
Code: 8b 40 0c 8b 50 08 66 39 7a 30 75 0c 8b 41 28 39 42 28 0f 84

>>EIP; c011a112 <send_sig_info+e2/4d0> <=====
Trace; c011a74c <kill_something_info+ec/100>
Trace; c010f160 <process_timeout+0/50>
Trace; c011aee8 <sys_kill+48/60>
Trace; c013dea0 <sys_select+480/490>
Trace; c0106ca2 <system_call+32/40>
Code; c011a112 <send_sig_info+e2/4d0>
00000000 <_EIP>:
Code; c011a112 <send_sig_info+e2/4d0> <=====
0: 8b 40 0c mov 0xc(%eax),%eax <=====
Code; c011a114 <send_sig_info+e4/4d0>
3: 8b 50 08 mov 0x8(%eax),%edx
Code; c011a118 <send_sig_info+e8/4d0>
6: 66 39 7a 30 cmp %di,0x30(%edx)
Code; c011a11c <send_sig_info+ec/4d0>
a: 75 0c jne 18 <_EIP+0x18> c011a12a
<send_sig_info+fa/4d0>
Code; c011a11e <send_sig_info+ee/4d0>
c: 8b 41 28 mov 0x28(%ecx),%eax
Code; c011a120 <send_sig_info+f0/4d0>
f: 39 42 28 cmp %eax,0x28(%edx)
Code; c011a124 <send_sig_info+f4/4d0>
12: 0f 84 00 00 00 00 je 18 <_EIP+0x18> c011a12a
<send_sig_info+fa/4d0>

the next one (diff with the above):
15d14
< Unable to handle kernel NULL pointer dereference at virtual address
0000000c
17c16
< *pde = 003a7067
---
> *pde = 014e2067
23,24c22,23
< eax: 00000000 ebx: c3f58000 ecx: c0f5c220 edx: c1132000
< esi: c0e1e000 edi: ffff0301 ebp: 0000000a esp: c0e1fee4
---
> eax: 00000000 ebx: c0f58000 ecx: c0f5c220 edx: c1132000
> esi: c0722000 edi: ffff0301 ebp: 00000009 esp: c0723ee4
26,30c25,30
< Process httpd (pid: 4063, stackpage=c0e1f000)
< Stack: 00005941 ffffffff 00005941 00000003 00000001 bffffc48 c011a74d
0000000a
< c0e1ff3c c3f58000 00000000 0009f8ab c0e1e000 c010f160 00005941
00000003
< 00000001 bffffc48 c011aee9 0000000a c0e1ff3c 00005941 0000000a
00000000
< Call Trace: [<c011a74d>] [<c010f160>] [<c011aee9>] [<c013dea0>]
[<c0106ca3>]
---
> Process httpd (pid: 31469, stackpage=c0723000)
> Stack: 0000044d ffffffff 0000044d 00000001 080ff6f0 bffffb74 c011a74d
00000009
> c0723f3c c0f58000 c0d68960 0020cc8c 00000001 c11071a0 0000044d
00000001
> 080ff6f0 bffffb74 c011aee9 00000009 c0723f3c 0000044d 00000009
00000000
> Call Trace: [<c011a74d>] [<c011aee9>] [<c010f234>] [<c010f160>]
[<c0114ce0>]
> [<c01197ce>] [<c0106ca3>]
35d34
< Trace; c010f160 <process_timeout+0/50>
37c36,39
< Trace; c013dea0 <sys_select+480/490>
---
> Trace; c010f234 <schedule_timeout+84/a0>
> Trace; c010f160 <process_timeout+0/50>
> Trace; c0114ce0 <sys_wait4+3b0/3c0>
> Trace; c01197ce <sys_nanosleep+10e/190>

and the last one (diff from the first):
17c17
< *pde = 003a7067
---
> *pde = 02562067
23,24c23,24
< eax: 00000000 ebx: c3f58000 ecx: c0f5c220 edx: c1132000
< esi: c0e1e000 edi: ffff0301 ebp: 0000000a esp: c0e1fee4
---
> eax: 00000000 ebx: c19d6000 ecx: c0f5c220 edx: c1132000
> esi: c3730000 edi: ffff0301 ebp: 00000009 esp: c3731ee4
26,30c26,31
< Process httpd (pid: 4063, stackpage=c0e1f000)
< Stack: 00005941 ffffffff 00005941 00000003 00000001 bffffc48 c011a74d
0000000a
< c0e1ff3c c3f58000 00000000 0009f8ab c0e1e000 c010f160 00005941
00000003
< 00000001 bffffc48 c011aee9 0000000a c0e1ff3c 00005941 0000000a
00000000
< Call Trace: [<c011a74d>] [<c010f160>] [<c011aee9>] [<c013dea0>]
[<c0106ca3>]
---
> Process httpd (pid: 29449, stackpage=c3731000)
> Stack: 00004afe ffffffff 00004afe 00000001 081129c0 bffffae0 c011a74d
00000009
> c3731f3c c19d6000 c3b0a980 0020cc8c 00000001 c11071a0 00004afe
00000001
> 081129c0 bffffae0 c011aee9 00000009 c3731f3c 00004afe 00000009
00000000
> Call Trace: [<c011a74d>] [<c011aee9>] [<c010f234>] [<c010f160>]
[<c0114ce0>]
> [<c01197ce>] [<c0106ca3>]
35d35
< Trace; c010f160 <process_timeout+0/50>
37c37,40
< Trace; c013dea0 <sys_select+480/490>
---
> Trace; c010f234 <schedule_timeout+84/a0>
> Trace; c010f160 <process_timeout+0/50>
> Trace; c0114ce0 <sys_wait4+3b0/3c0>
> Trace; c01197ce <sys_nanosleep+10e/190>

best regards,
terry


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