linux-kernel - Patch related with Fork Bobmbing Attack

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Message-ID: <25ae38200706120949vaeb8e0ascd182ef2f709d0fc@mail.gmail.com>
Date:	Tue, 12 Jun 2007 22:19:49 +0530
From:	"Anand Jahagirdar" <anandjigar@...il.com>
To:	linux-kernel@...r.kernel.org, security@...nel.org,
	"Andrew Morton" <akpm@...ux-foundation.org>, akpm@...eo.com,
	"Daniel Hazelton" <dhazelton@...er.net>,
	"Jens Axboe" <jens.axboe@...cle.com>,
	"Jiri Kosina" <jikos@...os.cz>
Subject: Patch related with Fork Bobmbing Attack

Hello All
              As per the discussion in the thread with subject as
Patch Related with Fork Bombing Attack on LKML, I request you for the
inclusion of my attached patch named "fork.patch".

Summery of the Patch:

This patch warns the administrator about the fork bombing attack
(whenever any user is crossing its process limit). I have used
printk_ratelimit function in this patch. This function helps to
prevent flooding of syslog and prints message as per the values set by
root user in following files:-

1) /proc/sys/kernel/printk_ratelimit:- This file contains value for,
how many times message should be printed in syslog.

2) /proc/sys/kernel/printk_ratelimit_burst: - This file contains value
for, after how much time message should be repeated.

This patch is really helpful for administrator/root user from security
point of view. They can take action against attacker by looking at
syslog messages related with fork bombing attack.

Added comments will definitely help developers.

Signed-Off-by: Anand Jahagirdar <anandjigar@...il.com>

View attachment "fork.patch" of type "text/plain" (1032 bytes)