From: Arjan van de Ven <arjan@infradead.org>
Date: Tue, 13 Oct 2009 21:17:36 +0000 (+1100)
Subject: capabilities: simplify bound checks for copy_from_user()
X-Git-Tag: v2.6.33-rc1~411^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=825332e4ff1373c55d931b49408df7ec2298f71e;p=pandora-kernel.git

capabilities: simplify bound checks for copy_from_user()

The capabilities syscall has a copy_from_user() call where gcc currently
cannot prove to itself that the copy is always within bounds.

This patch adds a very explicity bound check to prove to gcc that this
copy_from_user cannot overflow its destination buffer.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
---

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