Re: amd64: smap support

To: tech-kern%netbsd.org@localhost
Subject: Re: amd64: smap support
From: Maxime Villard <max%m00nbsd.net@localhost>
Date: Fri, 25 Aug 2017 14:16:58 +0200

Le 23/08/2017 à 16:24, Maxime Villard a écrit :

Here is a patch that implements SMAP on amd64. SMAP is basically a feature
that prevents the kernel from reading a userland page, and it's a great
exploit mitigation feature.

...

[1] http://m00nbsd.net/garbage/smap/amd64.diff


I've updated my patch. kcopy did not need a copy window, and there was
a missing smap_enable in one of the error branches.

References:
- amd64: smap support
  - From: Maxime Villard

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