bugtraq - Re: Hot fix for do

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Message-ID: <Pine.LNX.4.58.0312061927050.7490@orodruina.lan>
Date: Sat, 6 Dec 2003 19:51:58 +0100 (CET)
From: Pavel harry_x Palát <harry_x@...ylon5.cz>
To: bugtraq@...urityfocus.com
Subject: Re: Hot fix for do_brk bug

> It would be less intrusive to the kernel to supply a fixed do_brk()
> and replace the do_brk with a jump to your version.

I've written similar patch few days ago. The patch only modifies first
instructions of do_brk() (it replaces them with jmp to function in LKM.
It can be downloaded from http://wizard.ath.cx/fixbrk.tar.gz

But beware, I wrote it in rush and it's pretty odly written :-) But it
worked on my two servers (both were running 2.4.21 kernel with grsecurity
patch).

Greetings

Pavel Palát

--
Pavel "harry_x" Palát
    harry_x@...ylon5.cz
    irc: #mistral.cz on IRCnet

    The only way of finding the limits to the possible is by going beyond them to the impossible
                                                  Arthur C. Clark