Kernel 2.4.20 and IPv6 ICMP on Sparc32/64 bomb

[Peter Keel <seegras@discordia.ch>]

Hello

I know this probably doesn't really belong here, but this is the
only Sparc-ML I'm reading, and it may be of interest to you. 

ping6 on an IPv6-enabled Sparc32 or Sparc64 on Kernel 2.4.20 
bombs really nasty. Machine halts instantly. No matter what patches.

This is sparc32: 
oldlady:~# ping6 irc6.lugs.ch
Unable to handle kernel NULL pointer dereference<1>tsk->{mm,active_mm}->contextb
tsk->{mm,active_mm}->pgd = fc00c400

And this is sparc64:
josephine:~# ping6 irc6.lugs.ch
dING irc6.lRuEgJsE.CcThv(6v:e ncuasl.lpiancgi fiiccmap.vc6h_)s e5n6d
oatUan abbyltee st
  handle kernel NULL pointer dereference
tsk->{mm,active_mm}->context = 00000000000005d8
tsk->{mm,active_mm}->pgd = fffff800324b1000

USAGI or not, ip6filter-patch or not, grsec or not, doesn't seem to 
make any difference. 

I tried to run 2.5.6x instead, but I can't get it to boot anymore
(I had 2.5.68 running once on the Ultra1). All it says is "Data 
Access Exception". I'm pretty sure I misconfigured something, so 
if any of you has a .config of a running 2.5.69 or something on a 
stock Ultra1 (143Mhz, Lance), I'd be glad if you could mail it to me. 

Cheers
Peter
-- 
Those who give up essential liberties for temporary safety deserve 
neither liberty nor safety. -- Benjamin Franklin