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From: Kees Cook <keescook@chromium.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>,
	Vlastimil Babka <vbabka@suse.cz>, Marco Elver <elver@google.com>,
	Christoph Lameter <cl@linux.com>, "Lin, Zhenpeng" <zplin@psu.edu>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Roman Gushchin <guro@fb.com>,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-mm@kvack.org
Subject: [PATCH v4 0/3] Actually fix freelist pointer vs redzoning
Date: Tue,  8 Jun 2021 11:39:52 -0700	[thread overview]
Message-ID: <20210608183955.280836-1-keescook@chromium.org> (raw)

v4:
- remove redundant size check
v3: https://lore.kernel.org/lkml/20201015033712.1491731-1-keescook@chromium.org
v2: https://lore.kernel.org/lkml/20201009195411.4018141-1-keescook@chromium.org
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, especially since
people doing local development keep tripping over it. :)

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/slab_common.c          |  3 +--
 mm/slub.c                 | 36 +++++++++++++++---------------------
 3 files changed, 21 insertions(+), 28 deletions(-)

-- 
2.25.1


             reply	other threads:[~2021-06-08 18:45 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-08 18:39 Kees Cook [this message]
2021-06-08 18:39 ` [PATCH v4 1/3] mm/slub: Clarify verification reporting Kees Cook
2021-06-08 18:39 ` [PATCH v4 2/3] mm/slub: Fix redzoning for small allocations Kees Cook
2021-06-11  9:13   ` Vlastimil Babka
2021-06-08 18:39 ` [PATCH v4 3/3] mm/slub: Actually fix freelist pointer vs redzoning Kees Cook
2021-06-08 20:56   ` Andrew Morton
2021-06-08 23:11     ` Kees Cook
2021-06-08 20:53 ` [PATCH v4 0/3] " Andrew Morton
2021-06-08 23:08   ` Kees Cook

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