Re: [PATCH] x86, kaslr: randomize module base load address

H. Peter Anvin
2014-02-21T21:18:49Z

On 02/21/2014 01:15 PM, Andrew Morton wrote:
>>
>> I've been slapped down for adding more config options in the past, and
>> I think it's unlikely that people using CONFIG_RANDOMIZE_BASE won't
>> want the modules base randomized too. I think this is a safe default,
>> but if you see it as a requirement, I can change it.
>
> I think there were issues with some embedded systems where it's
> hard/impossible to provide/alter boot parameters.
>

We now allow kernel parameters to be compiled into the kernel image for
that reason.

>
> btw, would it be better to make each module have its own offset rather
> than using the same offset for all of them? That could cause problems
> with vmap space fragmentation I guess.
>

... but it would improve the amount of entropy.

-hpa