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robertk@ps.pl wrote:

> I am currently using Slackware 10.1 with 2.4.29 kernel and encountered
> following problem:

> I use Sagem Fast 800 ADSL modem of my provider and use my linux station
> as a router (iptables+masquerade). The problem is that after a few hours
> of working my linux crashes with the message:

> "
>
> serwer login: Unable to handle kernel NULL pointer dereference at virtual
> address 00000020
> *pde = 00000000
> 0opss: 0002
> CPU: 0
> EIP: 0010:[<c4958ca3>] Not tainted
> EFLAGS: 00010087
> eax: c11c56 ebx:c11c56c8 ecx:c11a1604 edx: c3139e34
> esi: 00000000 edi: c3139e34 ebp: c11c56dc esp: c3385f50
> ds: 0018 es: 0018 ss: 0018
> Process klogd (pid: 63, stackpage=c3385000)
> Stack: 0000246 00000000 c111c5660 00000001 0000ff80 c4958d51 c11c5660 c11c5660
> c3527ee0 04000001 c3385fc4 0000000a c0109fbd 0000000a c11c55660 c3385fc4
> c03829a0 0000000a c3527ee0 c3385fc4 c010a138 0000000a c3385fc4 c3527ee0
> Call Trace: [<c4958d51>] [<c0109fbd>] [<c010a138>] [<c010c428>]
>
> Code: c7 46 20 98 ff ff ff 8b 43 10 8b 80 d8 00 00 00 8b 40 2c 8b
> <0>Kernel panic: Aiee, killing interrupt handler!
> In interrupt handler - not syncing"

First check if there are updates for your distribution, apply them /all/.

Another thing to consider is memory problems. In my experience, this is
often due to CPU overheating (busted fan), bad power, or perhaps bad RAM
(check out memtest86+ <http://www.memtest.org>).

Hope this helps
--
Dr. Horst H. von Brand User #22616 counter.li.org
Departamento de Informatica Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria +56 32 654239
Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513
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