Date: Tue, 20 Jun 2017 15:41:13 -0400 From: Rik van Riel <riel@...hat.com> To: Kees Cook <keescook@...omium.org>, kernel-hardening@...ts.openwall.com Cc: David Windsor <dave@...lcore.net>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 00/23] Hardened usercopy whitelisting On Mon, 2017-06-19 at 16:36 -0700, Kees Cook wrote: > This series is modified from Brad Spengler/PaX Team's PAX_USERCOPY > code > in the last public patch of grsecurity/PaX based on our understanding > of the code. Changes or omissions from the original code are ours and > don't reflect the original grsecurity/PaX code. > > David Windsor did the bulk of the porting, refactoring, splitting, > testing, etc; I just did some extra tweaks, hunk moving, and small > extra patches. > > > This updates the slab allocator to add annotations (useroffset and > usersize) to define allowed usercopy regions. This is a great improvement over the old system of having a few whitelisted kmalloc caches, and bounce buffering to copy data from caches that are not whitelisted! I like it. -- All rights reversed Download attachment "signature.asc" of type "application/pgp-signature" (474 bytes)
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