LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Scott Wood <scottwood@freescale.com>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: "Rogério Brito" <rbrito@ime.usp.br>,
	linuxppc-dev@ozlabs.org, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc: enable heap randomization for linkstations
Date: Mon, 13 Oct 2008 13:44:43 -0500	[thread overview]
Message-ID: <20081013184443.GA20612@ld0162-tx32.am.freescale.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0810132003350.9041@axis700.grange>

On Mon, Oct 13, 2008 at 08:05:09PM +0200, Guennadi Liakhovetski wrote:
> On Mon, 13 Oct 2008, Rogério Brito wrote:
> 
> > The current defconfig for Linkstation/Kuroboxes has the "Disable Heap
> > Randomization" option enabled.
> > 
> > Since some of these machines are facing the internet, it helps to have
> > heap randomization enabled. This patch enables it.
> 
> Same as the previous patch - this is one of options, that users select 
> according to their needs. If any specific distribution enables this option 
> by default in their kernels, they can do this too, don't think this is 
> critical enough to patch the defconfig.

Just because users/distros can change it doesn't mean it's pointless to
discuss what default is sane, and make changes if the current default
isn't.

For security-related options it's usually best to default to the more
secure state, especially since the option description talks about it
being needed mainly for libc5 compatibility -- did libc5 ever even exist
for powerpc?  

The only reason it was turned on in the first place was likely the
"default y", which in turn is there to avoid breaking old x86 distros.

-Scott

  reply	other threads:[~2008-10-13 18:44 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-13  4:07 [PATCH] powerpc: compile kernel for linkstations optimized for size Rogério Brito
2008-10-13  4:51 ` [PATCH] powerpc: enable heap randomization for linkstations Rogério Brito
2008-10-13 18:05   ` Guennadi Liakhovetski
2008-10-13 18:44     ` Scott Wood [this message]
2008-10-13 19:27       ` Guennadi Liakhovetski
2008-10-13 20:56       ` Rogério Brito
2008-10-19  2:53       ` Rogério Brito
2008-10-19  3:16         ` Rogério Brito
2008-10-17  9:38   ` Rogério Brito
2008-10-28 13:58   ` Kumar Gala
2008-10-13 18:03 ` [PATCH] powerpc: compile kernel for linkstations optimized for size Guennadi Liakhovetski
2008-10-13 21:28   ` Rogério Brito
2008-10-17  9:37 ` Rogério Brito
2008-10-28 13:58 ` Kumar Gala

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20081013184443.GA20612@ld0162-tx32.am.freescale.net \
    --to=scottwood@freescale.com \
    --cc=akpm@linux-foundation.org \
    --cc=g.liakhovetski@gmx.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@ozlabs.org \
    --cc=rbrito@ime.usp.br \
    --subject='Re: [PATCH] powerpc: enable heap randomization for linkstations' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).