Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 18 Aug 2016 13:42:55 -0400
From: Rik van Riel <>
        "Paul E . McKenney"
Cc: Kees Cook <>, Laura Abbott <>,
        Steven Rostedt <>,
        Daniel Micay <>, Joe Perches <>,
        Stephen Boyd <>,
 Rameez Mustafa <>,
        Arnd Bergmann
        Greg Kroah-Hartman <>,
 Triplett <>,
        Mathieu Desnoyers
        Lai Jiangshan <>,
        "Aneesh Kumar K.V" <>,
        "Kirill A. Shutemov"
        Michael Ellerman <>,
        Andrew Morton <>,
        Dan Williams
 <>, Jan Kara <>,
        Thomas Gleixner
 <>, Josef Bacik <>,
        Ingo Molnar
 <>, Tejun Heo <>,
        Andrey Ryabinin
        Nikolay Aleksandrov
        Dmitry Vyukov <>,
Subject: Re: [PATCH v3 0/5] bug: Provide toggle for BUG
 on data corruption

On Wed, 2016-08-17 at 14:42 -0700, Kees Cook wrote:
> This adds CONFIG_BUG_ON_DATA_CORRUPTION to trigger BUG()s when the
> kernel
> encounters unexpected data structure integrity as currently detected
> Specifically list operations have been a target for widening flaws to
> gain
> "write anywhere" primitives for attackers, so this also consolidates
> the
> debug checking to avoid code and check duplication (e.g. RCU list
> debug
> was missing a check that got added to regular list debug). It also
> stops
> manipulations when corruption is detected, since worsening the
> corruption
> makes no sense. (Really, everyone should build with CONFIG_DEBUG_LIST
> since the checks are so inexpensive.)
> This is mostly a refactoring of similar code from PaX and Grsecurity,
> along with MSM kernel changes by Syed Rameez Mustafa.
> Along with the patches is a new lkdtm test to validate that setting
> CONFIG_DEBUG_LIST actually does what is desired.

Series looks good to me, too.

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.