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From: Joe Perches <joe@perches.com>
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Date: Sun, 03 Jul 2011 12:37:55 -0700
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Subject: Re: [kernel-hardening] Re: [RFC v1] implement SL*B and stack
 usercopy runtime checks
To: Vasiliy Kulikov <segoon@openwall.com>
Cc: kernel-hardening@lists.openwall.com, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org, Arnd Bergmann <arnd@arndb.de>, Christoph Lameter <cl@linux-foundation.org>, Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>, Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org
List-ID: <kernel-hardening.lists.openwall.com>

On Sun, 2011-07-03 at 23:24 +0400, Vasiliy Kulikov wrote:
> Btw, if the perfomance will be acceptable, what do you think about
> logging/reacting on the spotted overflows?

If you do, it might be useful to track the found location(s)
and only emit the overflow log entry once as found.

Maybe use __builtin_return_address(depth) for tracking.