Messages in this thread | | | Date | Fri, 25 Jan 2019 11:30:04 -0800 | From | Matthew Wilcox <> | Subject | Re: [PATCH] mm: Prevent mapping slab pages to userspace |
| |
On Sat, Jan 26, 2019 at 07:44:40AM +1300, Kees Cook wrote: > > - if (PageAnon(page)) > > + if (PageAnon(page) || PageSlab(page)) > > Are there other types that should not get mapped? (Or better yet, is > there a whitelist of those that are okay to be mapped?)
Funny you should ask; I think the next patch in this series looks like this:
- if (PageAnon(page) || PageSlab(page)) + if (PageAnon(page) || PageSlab(page) || page_has_type(page))
but let's see if there's something I've overlooked with this patch.
| |