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Re: Big problem on 2.0.x?
From: Hugo.van.der.Kooij () CAIW NL (Hugo.van.der.Kooij () CAIW NL)
Date: Fri, 10 Dec 1999 23:48:17 +0100


On Thu, 9 Dec 1999, Eduardo Cruz wrote:

Last week i was playing with my old linux 2.0.36 i486 box, while i was playing with the command ping and trying 
combinations of commands
i found that when u do a ping -s 65468 -R  ANYIPADDRESS ( -R record route) the system starts to print on the screen 
kernel dumps
, freezes complitely and after few secconds the system reboots.

The major problem with this (if this is a bug, because i dont have time to install differents kernels and test it 
better) is that command can be run by everyone
because you dont need root permissions to make a -R.

I tested this on a 2.0.35 and .36 (both slackware), when u try to do this on a 2.2.x the system prints out "message 
too long".
I think the problem is that there is a size-check missed when u reach the maximun packet size and u put the route 
information, but anyway
i am not a guru on kernels.

Being no guru I noticed there were some patches for these kernels and
2.0.x kernels now run into 2.0.38 so I suggest you test 2.0.38 before you
yell BUG.

Browsing the info on http://www.kernelnotes.org/ does at least make one
wonder wether this is a known issue that's solved as there are changes in
the networking code.

Hugo.

--
Hugo van der Kooij; Oranje Nassaustraat 16; 3155 VJ  Maasland
hvdkooij () caiw nl     http://home.kabelfoon.nl/~hvdkooij/
--------------------------------------------------------------
Use of any of my email addresses for unsollicited (commercial)
    email is a clear intrusion of my privacy and illegal!



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