linux-kernel - [PATCH v2 0/3] Actually fix freelist pointer vs redzoning

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Message-Id: <20201009195411.4018141-1-keescook@chromium.org>
Date:   Fri,  9 Oct 2020 12:54:08 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Kees Cook <keescook@...omium.org>, Marco Elver <elver@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Vlastimil Babka <vbabka@...e.cz>, Roman Gushchin <guro@...com>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH v2 0/3] Actually fix freelist pointer vs redzoning

v2:
- add additional clean-up patches
- add Tested-by
v1: https://lore.kernel.org/lkml/20201008233443.3335464-1-keescook@chromium.org

This fixes redzoning vs the freelist pointer (both for middle-position
and very small caches). Both are "theoretical" fixes, in that I see no
evidence of such small-sized caches actually be used in the kernel, but
that's no reason to let the bugs continue to exist. :)

Thanks!

-Kees


Kees Cook (3):
  mm/slub: Clarify verification reporting
  mm/slub: Fix redzoning for small allocations
  mm/slub: Actually fix freelist pointer vs redzoning

 Documentation/vm/slub.rst | 10 +++++-----
 mm/slub.c                 | 36 +++++++++++++++---------------------
 2 files changed, 20 insertions(+), 26 deletions(-)

-- 
2.25.1