Re: [PATCH] Protection for exploiting null dereference using mmap

[Chris Wright]

* Eric Paris (eparis@xxxxxxxxxx) wrote:
> One result of using the dummy hook for non-selinux kernels means that I
> can't leave the generic module stacking code in the SELinux check.  If
> the secondary ops are called they will always deny the operation just
> like in non-selinux systems even if SELinux policy would have allowed
> the action.  This patch may be the first step to removing the arbitrary
> LSM module stacking code from SELinux.  I think history has shown the
> arbitrary module stacking is not a good idea and eventually I want to
> pull out all the secondary calls which aren't used by the capability
> module, so I view this as just the first step along those lines.

Or replace them all with direct library calls to the capability code.
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