Re: [kernel-hardening] [RFC][PATCH 6/7] mm: Add Kconfig option for slab sanitization

Dave Hansen
2015-12-22T17:28:49Z

On 12/22/2015 09:24 AM, Christoph Lameter wrote:
> On Tue, 22 Dec 2015, Dave Hansen wrote:
>> Or are you just saying that we should use the poisoning *code* that we
>> already have in slub? Using the _code_ looks like a really good idea,
>> whether we're using it to write POISON_FREE, or 0's. Something like the
>> attached patch?
>
> Why would you use zeros? The point is just to clear the information right?
> The regular poisoning does that.

It then allows you to avoid the zeroing at allocation time.