From: Kees Cook <keescook@chromium.org>
To: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Kees Cook <keescook@chromium.org>,
Stephen Boyd <sboyd@codeaurora.org>,
Daniel Micay <danielmicay@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Josh Triplett <josh@joshtriplett.org>,
Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Tejun Heo <tj@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>, Jan Kara <jack@suse.cz>,
Josef Bacik <jbacik@fb.com>, Thomas Gleixner <tglx@linutronix.de>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Nikolay Aleksandrov <nikolay@cumulusnetworks.com>,
Dmitry Vyukov <dvyukov@google.com>,
linux-kernel@vger.kernel.org,
kernel-hardening@lists.openwall.com
Subject: [PATCH 0/5] bug: Provide toggle for BUG on data corruption
Date: Tue, 16 Aug 2016 14:11:00 -0700 [thread overview]
Message-ID: <1471381865-25724-1-git-send-email-keescook@chromium.org> (raw)
This adds a CONFIG to trigger BUG()s when the kernel encounters
unexpected data structure integrity as currently detected with
CONFIG_DEBUG_LIST, CONFIG_DEBUG_SPINLOCK, and with workqueues.
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 Stephen Boyd.
Along with the patches is a new lkdtm test to validate that setting
CONFIG_DEBUG_LIST actually does what is desired.
Thanks,
-Kees
next reply other threads:[~2016-08-16 21:11 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-16 21:11 Kees Cook [this message]
2016-08-16 21:11 ` [PATCH 1/5] list: Split list_add() debug checking into separate function Kees Cook
2016-08-16 21:11 ` [PATCH 2/5] rculist: Consolidate DEBUG_LIST for list_add_rcu() Kees Cook
2016-08-16 21:11 ` [PATCH 3/5] list: Split list_del() debug checking into separate function Kees Cook
2016-08-16 21:11 ` [PATCH 4/5] bug: Provide toggle for BUG on data corruption Kees Cook
2016-08-16 21:26 ` Paul E. McKenney
2016-08-16 21:42 ` Kees Cook
2016-08-16 21:53 ` Steven Rostedt
2016-08-16 21:57 ` Steven Rostedt
2016-08-16 23:14 ` Kees Cook
2016-08-17 0:01 ` Paul E. McKenney
2016-08-17 0:09 ` Kees Cook
2016-08-17 16:09 ` Paul E. McKenney
2016-08-17 16:14 ` Kees Cook
2016-08-17 16:32 ` Paul E. McKenney
2016-08-16 21:50 ` Laura Abbott
2016-08-16 23:11 ` Kees Cook
2016-08-16 21:11 ` [PATCH 5/5] lkdtm: Add tests for struct list corruption Kees Cook
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