linux-kernel - Re: How to hack syscall-table, in kernel 2.6+ ?

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Message-ID: <20120814134020.367361b5@pyramind.ukuu.org.uk>
Date:	Tue, 14 Aug 2012 13:40:20 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Ajay Garg <ajaygargnsit@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to hack syscall-table, in kernel 2.6+ ?

> I have already tried extracting the address of the "sys_call_table"
> from "System.Map"; however, I am still not able to replace the
> function-pointers with mine.

Correct.

> Trying to do gives me page-faults, apparently meaning that the
> syscall-table memory area is read-only.

Correct.

The kernel is specifically designed to stop such uses by rootkits and
trojans and other malware.

If you are trying to patch the system call table you are doing something
wrong. What are you actually trying to achieve ?
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