Re: [PATCH 1/2] mm: Expand CONFIG_SLAB_FREELIST_HARDENED to include SLAB and SLOB

[Matthew Wilcox]

On Wed, Jun 17, 2020 at 12:53:48PM -0700, Kees Cook wrote:
> Include SLAB and SLOB caches when performing kmem_cache pointer

... SLOB?  Really?  Objects from different kmem caches are mixed together
on the same page with SLOB (at least last time I looked).  So how does
this work?

> verification. A defense against such corruption[1] should be applied
> to all the allocators. With this added, the "SLAB_FREE_CROSS" and
> "SLAB_FREE_PAGE" LKDTM tests now pass on SLAB: