From: "H. Peter Anvin" <hpa@zytor.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Dan Rosenberg <drosenberg@vsecurity.com>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Tony Luck <tony.luck@gmail.com>,
linux-kernel@vger.kernel.org, davej@redhat.com,
kees.cook@canonical.com, davem@davemloft.net, eranian@google.com,
adobriyan@gmail.com, penberg@kernel.org,
Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Valdis.Kletnieks@vt.edu, pageexec@freemail.hu
Subject: Re: [RFC][PATCH] Randomize kernel base address on boot
Date: Fri, 27 May 2011 14:37:14 -0700 [thread overview]
Message-ID: <4DE0198A.9080108@zytor.com> (raw)
In-Reply-To: <BANLkTimVQbHvW8tCACAcC8zRkyY1KyU2ww@mail.gmail.com>
On 05/27/2011 11:05 AM, Linus Torvalds wrote:
>
> You can load the kernel at the same virtual address we always load it,
> and/or perhaps shift it up by just small amounts (ie "single pages"
> rather than "ten bits worth of pages")
>
> And then rely on the fact that you mixed up symbols in other ways.
>
OK, here is a bat-shit-crazy idea... an all-module kernel where nothing
except init code is prelinked at all.
If we could modularize the core code we could have init code load the
modules at all kinds of random addresses; they wouldn't even need to be
contiguous in memory, and since we'd have full access to the memory
layout at that point, we can randomize the **** out of *everything*.
-hpa
next prev parent reply other threads:[~2011-05-27 21:38 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 20:31 [RFC][PATCH] Randomize kernel base address on boot Dan Rosenberg
2011-05-24 21:02 ` Ingo Molnar
2011-05-24 22:55 ` Dan Rosenberg
2011-05-24 21:16 ` Ingo Molnar
2011-05-24 23:00 ` Dan Rosenberg
2011-05-25 11:23 ` Ingo Molnar
2011-05-25 14:20 ` Dan Rosenberg
2011-05-25 14:29 ` Ingo Molnar
2011-05-24 23:06 ` H. Peter Anvin
2011-05-25 14:03 ` Dan Rosenberg
2011-05-25 14:14 ` Ingo Molnar
2011-05-25 15:48 ` H. Peter Anvin
2011-05-25 16:15 ` Dan Rosenberg
2011-05-25 16:24 ` H. Peter Anvin
2011-05-24 21:46 ` Brian Gerst
2011-05-24 23:01 ` Dan Rosenberg
2011-05-24 22:31 ` H. Peter Anvin
2011-05-24 23:04 ` Dan Rosenberg
2011-05-24 23:07 ` H. Peter Anvin
2011-05-24 23:34 ` Dan Rosenberg
2011-05-24 23:36 ` H. Peter Anvin
2011-05-24 23:14 ` H. Peter Anvin
2011-05-24 23:08 ` Dan Rosenberg
2011-05-25 2:05 ` Dan Rosenberg
2011-05-26 20:01 ` Vivek Goyal
2011-05-26 20:06 ` Dan Rosenberg
2011-05-26 20:16 ` Valdis.Kletnieks
2011-05-26 20:31 ` Vivek Goyal
2011-05-27 9:36 ` Ingo Molnar
2011-05-26 20:35 ` Vivek Goyal
2011-05-26 20:40 ` Vivek Goyal
2011-05-26 20:44 ` Dan Rosenberg
2011-05-26 20:55 ` Vivek Goyal
2011-05-27 9:38 ` Ingo Molnar
2011-05-27 13:07 ` Vivek Goyal
2011-05-27 13:38 ` Ingo Molnar
2011-05-27 13:13 ` Vivek Goyal
2011-05-27 13:21 ` Dan Rosenberg
2011-05-27 13:46 ` Ingo Molnar
2011-05-27 13:50 ` Vivek Goyal
2011-05-26 20:39 ` Dan Rosenberg
2011-05-27 7:15 ` Ingo Molnar
2011-05-31 16:52 ` Matthew Garrett
2011-05-31 18:40 ` H. Peter Anvin
2011-05-31 18:51 ` Matthew Garrett
2011-05-31 19:03 ` Dan Rosenberg
2011-05-31 19:07 ` H. Peter Anvin
2011-05-31 19:50 ` Ingo Molnar
2011-05-31 19:55 ` Ingo Molnar
2011-05-31 20:15 ` H. Peter Anvin
2011-05-31 20:27 ` Ingo Molnar
2011-05-31 20:30 ` H. Peter Anvin
2011-06-01 6:18 ` Ingo Molnar
2011-06-01 15:44 ` H. Peter Anvin
2011-05-31 20:17 ` Dan Rosenberg
2011-05-26 22:18 ` Rafael J. Wysocki
2011-05-26 22:32 ` H. Peter Anvin
2011-05-27 0:26 ` Dan Rosenberg
2011-05-27 16:21 ` Rafael J. Wysocki
2011-05-27 2:45 ` Dave Jones
2011-05-27 9:40 ` Ingo Molnar
2011-05-27 16:11 ` Rafael J. Wysocki
2011-05-27 16:07 ` Rafael J. Wysocki
2011-05-27 15:42 ` Linus Torvalds
2011-05-27 16:11 ` Dan Rosenberg
2011-05-27 17:00 ` Ingo Molnar
2011-05-27 17:06 ` H. Peter Anvin
2011-05-27 17:10 ` Dan Rosenberg
2011-05-27 17:13 ` H. Peter Anvin
2011-05-27 17:16 ` Linus Torvalds
2011-05-27 17:38 ` Ingo Molnar
2011-05-27 17:20 ` Kees Cook
2011-05-27 17:16 ` Ingo Molnar
2011-05-27 17:21 ` Linus Torvalds
2011-05-27 17:46 ` Ingo Molnar
2011-05-27 17:53 ` H. Peter Anvin
2011-05-27 18:05 ` Linus Torvalds
2011-05-27 19:15 ` Vivek Goyal
2011-05-27 21:37 ` H. Peter Anvin [this message]
2011-05-27 23:51 ` H. Peter Anvin
2011-05-28 12:18 ` Ingo Molnar
2011-05-29 1:13 ` H. Peter Anvin
2011-05-29 12:47 ` Ingo Molnar
2011-05-29 18:19 ` H. Peter Anvin
2011-05-29 18:44 ` Ingo Molnar
2011-05-29 18:52 ` H. Peter Anvin
2011-05-29 19:56 ` Ingo Molnar
2011-05-27 17:57 ` Linus Torvalds
2011-05-27 18:17 ` Ingo Molnar
2011-05-27 18:43 ` Kees Cook
2011-05-27 18:48 ` david
2011-05-27 21:51 ` Olivier Galibert
2011-05-27 22:11 ` Valdis.Kletnieks
2011-05-28 0:50 ` H. Peter Anvin
2011-05-28 6:32 ` Ingo Molnar
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