Re: [PATCH v2] x86/mm: warn on W+x mappings

[Borislav Petkov]

On Wed, Oct 21, 2015 at 02:57:47PM +0200, Ard Biesheuvel wrote:
> ... For the remaining cases, which is the vast majority, no such
> assumptions can be made, and since the UEFI runtime regions are
> typically populated with a bunch of PE/COFF images (each of which
> consists of text + data), inferring where the boundaries are between
> them does not seem tractable (for instance, to only map 'boundary'
> pages RWX)

How much of a problem would it be if we still do the on-demand page
faulting and map a trailing piece of code together with the data in a
page RWX?

Still better than mapping the *whole* thing RWX, no?

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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