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Date: Fri, 5 May 2023 09:35:59 +0200
From: David Hildenbrand <>
To: Michael McCracken <>,
 Luis Chamberlain <>, Kees Cook <>,
 Iurii Zaikin <>, Andrew Morton
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?


David / dhildenb

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