Re: [PATCH 05/36] usercopy: WARN() on slab cache usercopy region violations

[Christopher Lameter]

On Tue, 9 Jan 2018, Kees Cook wrote:

> @@ -3823,11 +3825,9 @@ int __check_heap_object(const void *ptr, unsigned long n, struct page *page,

Could we do the check in mm_slab_common.c for all allocators and just have
a small function in each allocators that give you the metadata needed for
the object?

> + * carefully audit the whitelist range).
> + */
>  int report_usercopy(const char *name, const char *detail, bool to_user,
>  		    unsigned long offset, unsigned long len)
>  {

Should this not be added earlier?