Messages in this thread | | | Date | Mon, 28 Jan 2019 10:20:55 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] mm: Prevent mapping slab pages to userspace |
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On Fri, 25 Jan 2019 09:38:27 -0800 Matthew Wilcox <willy@infradead.org> wrote:
> It's never appropriate to map a page allocated by SLAB into userspace. > A buggy device driver might try this, or an attacker might be able to > find a way to make it happen.
It wouldn't surprise me if someone somewhere is doing this. Rather than mysteriously breaking their code, how about we emit a warning and still permit it to proceed, for a while?
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