linux-kernel - Re: [PATCH] Allow Kconfig to set default mmap_min

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Message-ID: <Pine.LNX.4.64.0712212303410.18570@fbirervta.pbzchgretzou.qr>
Date:	Fri, 21 Dec 2007 23:04:19 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Willy Tarreau <w@....eu>
cc:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	jmorris@...ei.org, alan@...hat.com, chrisw@...hat.com,
	akpm@...ux-foundation.org, linux-security-module@...r.kernel.org,
	solar@...nwall.com, wtarreau@...a.kernel.org
Subject: Re: [PATCH] Allow Kconfig to set default mmap_min_addr protection


On Dec 21 2007 22:16, Willy Tarreau wrote:
>Hi Jan,
>
>> >> >+config SECURITY_DEFAULT_MMAP_MIN_ADDR
>> >> >+        int "Low address space to protect from user allocation"
>> >> 
>> >> Hm, should not this be 'hex'?
>> >
>> >I guess it could be, but the input for /proc/sys/vm/mmap_min_addr is
>> >base 10 as well
>> 
>> sysfs is autobase, i.e. echo "0xb000" >/sys/foo will Do The Right Thing.
>
>yes but if you cat  /proc/sys/vm/mmap_min_addr, it returns in base 10.

sysfs should probably be tuned to output it in a preferred base.
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