Re: [patch 41/60] x86/mm/kpti: Share entry text PMD

[Borislav Petkov]

On Mon, Dec 04, 2017 at 03:07:47PM +0100, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> 
> Share the entry text PMD of the kernel mapping with the user space
> mapping. If large pages are enabled this is a single PMD entry and at the
> point where it is copied into the user page table the RW bit has not been
> cleared yet. Clear it right away so the user space visible map becomes RX.
> 
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
>  arch/x86/mm/kpti.c |   10 ++++++++++
>  1 file changed, 10 insertions(+)

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix ImendÃrffer, Jane Smithard, Graham Norton, HRB 21284 (AG NÃrnberg)
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