Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin

[Arnd Bergmann]

On Mon, Mar 27, 2017 at 6:14 PM, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> On Mon, Mar 27, 2017 at 12:38 AM, Andrew Donnellan
> <andrew.donnellan@xxxxxxxxxxx> wrote:
>> On 01/02/17 07:24, Kees Cook wrote:
>>>
>>> From: Emese Revfy <re.emese@xxxxxxxxx>
>>>
>>> The kernel already has a mechanism to free up code and data memory that
>>> is only used during kernel or module initialization.  This plugin will
>>> teach the compiler to find more such code and data that can be freed
>>> after initialization.
>>
>>
>> Currently checking whether we can wire this up for powerpc without too many
>> problems...
>
> Cool, thanks. FWIW, note that this plugin is a bit back-burnered at
> the moment. I've got this in my -next tree still, but it needs some
> rather large changes to how it does its annotations before Linus will
> accept it.

I've tried turning it on again a few days ago and still got too many build
problems with my randconfig tree, so I've turned it off again. I think I've
already reported most of what I found now, so I did not send out new
reports.

      Arnd