From: Ingo Molnar <mingo@elte.hu>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: Dan Rosenberg <drosenberg@vsecurity.com>,
Tony Luck <tony.luck@gmail.com>,
linux-kernel@vger.kernel.org, davej@redhat.com,
kees.cook@canonical.com, davem@davemloft.net, eranian@google.com,
torvalds@linux-foundation.org, adobriyan@gmail.com,
penberg@kernel.org, hpa@zytor.com,
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 11:38:53 +0200 [thread overview]
Message-ID: <20110527093853.GI21386@elte.hu> (raw)
In-Reply-To: <20110526205549.GM29496@redhat.com>
* Vivek Goyal <vgoyal@redhat.com> wrote:
> > Is it common to run kexec-tools as non-root? It may be necessary
> > to restrict this interface to root when randomization is used
> > (keep in mind nobody's going to force you to turn this on by
> > default, at least for the foreseeable future).
>
> kexec-tools runs as root. And I see that /proc/iomem permissions
> are also for root only. So it probably is a non-issue.
it might be an issue to keep in mind for later projects that try to
lock down root itself from being able to patch the kernel (other than
rebooting the box), using signed modules, disabled direct-ioport
access, and other hardened facilities.
Thanks,
Ingo
next prev parent reply other threads:[~2011-05-27 9:39 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 [this message]
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
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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