Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 5 May 2023 09:35:59 +0200
From: David Hildenbrand <david@...hat.com>
To: Michael McCracken <michael.mccracken@...il.com>,
 linux-kernel@...r.kernel.org
Cc: kernel-hardening@...ts.openwall.com, serge@...lyn.com, tycho@...ho.pizza,
 Luis Chamberlain <mcgrof@...nel.org>, Kees Cook <keescook@...omium.org>,
 Iurii Zaikin <yzaikin@...gle.com>, Andrew Morton
 <akpm@...ux-foundation.org>, linux-fsdevel@...r.kernel.org,
 linux-mm@...ck.org
Subject: Re: [PATCH] sysctl: add config to make randomize_va_space RO

On 04.05.23 23:30, Michael McCracken wrote:
> Add config RO_RANDMAP_SYSCTL to set the mode of the randomize_va_space
> sysctl to 0444 to disallow all runtime changes. This will prevent
> accidental changing of this value by a root service.
> 
> The config is disabled by default to avoid surprises.

Can you elaborate why we care about "accidental changing of this value 
by a root service"?

We cannot really stop root from doing a lot of stupid things (e.g., 
erase the root fs), so why do we particularly care here?

-- 
Thanks,

David / dhildenb

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.