Re: Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE_PTR to point at unmapped space)

Linus Torvalds
2009-06-03T16:19:36Z

On Wed, 3 Jun 2009, Christoph Lameter wrote:
>
> mmap_min_addr depends on CONFIG_SECURITY which establishes various
> strangely complex "security models".
>
> The system needs to be secure by default.

It _is_ secure by default. You have to do some pretty non-default things
to get away from it.

But I do agree that it might be good to move the thing into the generic
path. I just don't think your arguments are very good. It's not about
defaults, it's about the fact that this isn't worth being hidden by that
security layer.

Linus