[GIT PULL] keys: Fix key->sem vs mmap_sem issue when reading key

[David Howells]

Waiman Long <longman at redhat.com> wrote:

> > And yes, kzfree() isn't a good name either, and had that same
> > memset(), but at least it doesn't do the dual-underscore mistake.
> >
> > Including some kzfree()/crypto people explicitly - I hope we can get
> > away from this incorrect and actively wrong pattern of thinking that
> > "sensitive data should be memset(), and then we should add a random
> > 'z' in the name somewhere to 'document' that".
> >
> >                Linus
> >
> Thanks for the suggestion, I will post a patch to rename the function to
> kvzfree_explicit() and use memzero_explicit() for clearing memory.

Should this be moved into core code, rather than being squirrelled away in
security/keys/?

David