From: Linus Torvalds <torvalds@linux-foundation.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>,
"Larry H." <research@subreption.com>,
linux-mm@kvack.org, Alan Cox <alan@lxorguk.ukuu.org.uk>,
Rik van Riel <riel@redhat.com>,
linux-kernel@vger.kernel.org, pageexec@freemail.hu
Subject: Re: Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE_PTR to point at unmapped space)
Date: Wed, 3 Jun 2009 09:18:22 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.2.01.0906030912340.4880@localhost.localdomain> (raw)
In-Reply-To: <alpine.DEB.1.10.0906031134410.13551@gentwo.org>
On Wed, 3 Jun 2009, Christoph Lameter wrote:
>
> mmap_min_addr depends on CONFIG_SECURITY which establishes various
> strangely complex "security models".
>
> The system needs to be secure by default.
It _is_ secure by default. You have to do some pretty non-default things
to get away from it.
But I do agree that it might be good to move the thing into the generic
path. I just don't think your arguments are very good. It's not about
defaults, it's about the fact that this isn't worth being hidden by that
security layer.
Linus
next prev parent reply other threads:[~2009-06-03 16:20 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-30 19:28 [PATCH] Change ZERO_SIZE_PTR to point at unmapped space Larry H.
2009-05-30 22:29 ` Linus Torvalds
2009-05-30 23:00 ` Larry H.
2009-05-31 2:02 ` Linus Torvalds
2009-05-31 2:21 ` Larry H.
2009-06-02 15:37 ` Christoph Lameter
2009-06-02 20:34 ` Larry H.
2009-06-03 14:50 ` Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE_PTR to point at unmapped space) Christoph Lameter
2009-06-03 15:07 ` Linus Torvalds
2009-06-03 15:23 ` Christoph Lameter
2009-06-03 15:38 ` Linus Torvalds
2009-06-03 16:14 ` Alan Cox
2009-06-03 16:19 ` Linus Torvalds
2009-06-03 16:24 ` Eric Paris
2009-06-03 16:22 ` Eric Paris
2009-06-03 16:28 ` Linus Torvalds
2009-06-03 16:32 ` Eric Paris
2009-06-03 16:44 ` Linus Torvalds
2009-06-03 15:11 ` Stephen Smalley
2009-06-03 15:41 ` Christoph Lameter
2009-06-03 16:18 ` Linus Torvalds [this message]
2009-06-03 16:28 ` Larry H.
2009-06-03 16:36 ` Rik van Riel
2009-06-03 16:47 ` Linus Torvalds
2009-06-03 17:16 ` Eric Paris
2009-06-03 17:28 ` Linus Torvalds
2009-06-03 17:31 ` Eric Paris
2009-06-03 17:24 ` Larry H.
2009-06-03 17:21 ` Larry H.
2009-06-03 22:52 ` James Morris
2009-06-03 17:29 ` Alan Cox
2009-06-03 17:35 ` Linus Torvalds
2009-06-03 18:00 ` Larry H.
2009-06-03 18:12 ` Linus Torvalds
2009-06-03 18:39 ` Larry H.
2009-06-03 18:45 ` Linus Torvalds
2009-06-03 18:50 ` Linus Torvalds
2009-06-03 18:59 ` Christoph Lameter
2009-06-03 19:11 ` Rik van Riel
2009-06-03 19:14 ` Eric Paris
2009-06-03 19:42 ` Christoph Lameter
2009-06-03 19:51 ` Eric Paris
2009-06-03 20:04 ` Christoph Lameter
2009-06-03 20:16 ` Eric Paris
2009-06-03 20:36 ` Christoph Lameter
2009-06-03 21:20 ` Linus Torvalds
2009-06-04 2:41 ` James Morris
2009-06-03 19:21 ` Alan Cox
2009-06-03 19:45 ` Christoph Lameter
2009-06-03 21:07 ` Alan Cox
2009-06-03 19:27 ` Linus Torvalds
2009-06-03 19:50 ` Christoph Lameter
2009-06-03 20:00 ` pageexec
2009-06-03 19:41 ` pageexec
2009-06-07 10:29 ` Pavel Machek
2009-05-30 22:32 ` [PATCH] Change ZERO_SIZE_PTR to point at unmapped space Peter Zijlstra
2009-05-30 22:51 ` Larry H.
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