linux-kernel - Re: Turn CONFIG_STRICT_DEVMEM in sysctl dev.mem.restricted

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Message-ID: <4920836E.1080803@kernel.org>
Date:	Sun, 16 Nov 2008 12:32:46 -0800
From:	"H. Peter Anvin" <hpa@...nel.org>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Bernhard Walle <bwalle@...e.de>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	crash-utility@...hat.com
Subject: Re: Turn CONFIG_STRICT_DEVMEM in sysctl dev.mem.restricted

Arjan van de Ven wrote:
> 
> I assume /dev/crash is read only
> 
> but your series still makes absolutely no sense to me...
> really. Nak.
> 
> You either want this at compile time or you don't want it at all.
> 

You could certainly envision this as a boottime option, or even a
*one-way* settable runtime option (kind of like the BSD securelevel
idea.)  The question is to which extent even that makes any sense.

	-hpa
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