From: Rik van Riel <riel@redhat.com>
To: paulmck@linux.vnet.ibm.com
Cc: kernel-hardening@lists.openwall.com,
Kees Cook <keescook@chromium.org>,
Laura Abbott <labbott@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Daniel Micay <danielmicay@gmail.com>,
Joe Perches <joe@perches.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Syed Rameez Mustafa <rameezmustafa@codeaurora.org>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Josh Triplett <josh@joshtriplett.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>, Jan Kara <jack@suse.cz>,
Thomas Gleixner <tglx@linutronix.de>, Josef Bacik <jbacik@fb.com>,
Ingo Molnar <mingo@kernel.org>, Tejun Heo <tj@kernel.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Nikolay Aleksandrov <nikolay@cumulusnetworks.com>,
Dmitry Vyukov <dvyukov@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: [kernel-hardening] [PATCH v3 0/5] bug: Provide toggle for BUG on data corruption
Date: Thu, 18 Aug 2016 22:53:18 -0400 [thread overview]
Message-ID: <1471575198.32433.75.camel@redhat.com> (raw)
In-Reply-To: <20160818205700.GZ3482@linux.vnet.ibm.com>
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On Thu, 2016-08-18 at 13:57 -0700, Paul E. McKenney wrote:
> On Thu, Aug 18, 2016 at 01:42:55PM -0400, Rik van Riel wrote:
> > 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
> > > with CONFIG_DEBUG_LIST.
> > >
> > > 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.
>
> Reviewed-by? Acked-by? Ephemeral accolades? ;-)
Acked-by: Rik van Riel <riel@redhat.com>
works, but I saw you already committed the series to
your tree, and was not sure you would add more reviews :)
--
All Rights Reversed.
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next prev parent reply other threads:[~2016-08-19 2:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-17 21:42 [PATCH v3 0/5] bug: Provide toggle for BUG on data corruption Kees Cook
2016-08-17 21:42 ` [PATCH v3 1/5] list: Split list_add() debug checking into separate function Kees Cook
2016-08-17 21:42 ` [PATCH v3 2/5] rculist: Consolidate DEBUG_LIST for list_add_rcu() Kees Cook
2016-08-17 21:42 ` [PATCH v3 3/5] list: Split list_del() debug checking into separate function Kees Cook
2016-08-17 21:42 ` [PATCH v3 4/5] bug: Provide toggle for BUG on data corruption Kees Cook
2016-08-22 13:15 ` Arnd Bergmann
2016-08-22 17:53 ` Paul E. McKenney
2016-08-22 22:32 ` [kernel-hardening] " Kees Cook
2016-08-17 21:42 ` [PATCH v3 5/5] lkdtm: Add tests for struct list corruption Kees Cook
2016-08-18 13:46 ` [PATCH v3 0/5] bug: Provide toggle for BUG on data corruption Steven Rostedt
2016-08-18 17:29 ` Paul E. McKenney
2016-08-18 17:42 ` [kernel-hardening] " Rik van Riel
2016-08-18 20:57 ` Paul E. McKenney
2016-08-19 2:53 ` Rik van Riel [this message]
2016-08-19 17:46 ` Paul E. McKenney
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