linux-kernel - Re: [PATCH] Protection for exploiting null dereference using mmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Line.LNX.4.64.0706051658170.23379@d.namei>
Date:	Tue, 5 Jun 2007 17:00:51 -0400 (EDT)
From:	James Morris <jmorris@...ei.org>
To:	Eric Paris <eparis@...hat.com>
cc:	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov,
	Alan Cox <alan@...hat.com>, drepper@...hat.com,
	roland@...hat.com, arjan@...radead.org, mingo@...e.hu,
	viro@...iv.linux.org.uk, chrisw@...hat.com, sds@...ho.nsa.gov,
	sgrubb@...hat.com
Subject: Re: [PATCH] Protection for exploiting null dereference using mmap

On Tue, 5 Jun 2007, Eric Paris wrote:

> +extern int mmap_protect_memory;

This should be an unsigned long.

I wonder if the default should be for this value to be zero (i.e. preserve 
existing behavior).  It could break binaries, albeit potentially insecure 
ones.


- James
-- 
James Morris
<jmorris@...ei.org>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/