Messages in this thread | | | Date | Mon, 09 Dec 2013 18:53:16 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH] kexec: add sysctl to disable kexec |
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On 12/09/2013 06:38 PM, 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.
Not everybody will be running with selinux, or another LSM security policy, so having this simple knob probably makes sense.
OTOH, are the people who run without a fancy security people the same people who are interested in locking down the system?
I guess I'll ack the patch, since I see no real downside to having the knob...
> Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Rik van Riel <riel@redhat.com>
-- All rights reversed
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