Move management of the file->f_security blob out of the
individual security modules and into the infrastructure.
The modules no longer allocate or free the data, instead
they tell the infrastructure how much space they require.
Signed-off-by: NCasey Schaufler <casey@schaufler-ca.com>
Reviewed-by: NKees Cook <keescook@chromium.org>
[kees: adjusted for ordered init series]
Signed-off-by: NKees Cook <keescook@chromium.org>