From: Khalid Aziz <khalid@gonehiking.org>
To: Kees Cook <keescook@chromium.org>
Cc: Matthew Garrett <matthew.garrett@nebula.com>,
Rik van Riel <riel@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
Eric Biederman <ebiederm@xmission.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>, Vivek Goyal <vgoyal@redhat.com>,
Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH] kexec: add sysctl to disable kexec
Date: Mon, 09 Dec 2013 17:19:48 -0700 [thread overview]
Message-ID: <1386634788.24817.46.camel@rhapsody> (raw)
In-Reply-To: <20131209233829.GA3501@www.outflux.net>
On Mon, 2013-12-09 at 15:38 -0800, Kees Cook wrote:
> For general-purpose (i.e. distro) kernel builds it makes sense to build with
> CONFIG_KEXEC to allow end users to choose what kind of things they want to do
> with kexec. However, in the face of trying to lock down a system with such
> a kernel, there needs to be a way to disable kexec (much like module loading
> can be disabled). Without this, it is too easy for the root user to modify
> kernel memory even when CONFIG_STRICT_DEVMEM and modules_disabled are set.
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Giving Sys admins more control to secure their system is a good idea.
This addition looks good to me.
--
Khalid
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prev parent reply other threads:[~2013-12-10 0:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-09 23:38 [PATCH] kexec: add sysctl to disable kexec Kees Cook
2013-12-09 23:53 ` Rik van Riel
2013-12-10 0:15 ` Kees Cook
2013-12-10 0:19 ` Khalid Aziz [this message]
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