From: Jason Baron <jbaron@redhat.com>
Date: Thu, 16 Oct 2008 05:01:52 +0000 (-0700)
Subject: exec.c, compat.c: fix count(), compat_count() bounds checking
X-Git-Tag: v2.6.28-rc1~522
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=362e6663ef23;p=pandora-kernel.git

exec.c, compat.c: fix count(), compat_count() bounds checking

With MAX_ARG_STRINGS set to 0x7FFFFFFF, and being passed to 'count()' and
compat_count(), it would appear that the current max bounds check of
fs/exec.c:394:

	if(++i > max)
		return -E2BIG;

would never trigger. Since 'i' is of type int, so values would wrap and the
function would continue looping.

Simple fix seems to be chaning ++i to i++ and checking for '>='.

Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Ollie Wild" <aaw@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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