Re: [PATCH v2 2/3] mm/slub: Fix redzoning for small allocations

Christopher Lameter
2020-10-12T08:01:06Z

On Fri, 9 Oct 2020, Kees Cook wrote:

> Store the freelist pointer out of line when object_size is smaller than
> sizeof(void *) and redzoning is enabled.
>
> (Note that no caches with such a size are known to exist in the kernel
> currently.)

Ummm... The smallest allowable cache size is sizeof(void *) as I recall.

mm/slab_common.c::kmem_sanity_check() checks the sizes when caches are
created.

NAK.