Re: [PATCH v2] kexec: add sysctl to disable kexec

H. Peter Anvin
2013-12-10T18:55:14Z

On 12/10/2013 10:33 AM, Vivek Goyal wrote:
> On Tue, Dec 10, 2013 at 08:32:38AM -0800, H. Peter Anvin wrote:
>> Of course it isn't.
>
> I am not sure what are you trying to say. This is too brief.
>
> Thanks
> Vivek
>

Of course it is not sufficient. Once you can get arbitrary code into
kernel space (CPL 0) you can do anything, and "disabling jump back" is
just a speed bump.

-hpa