From 077c9f651e2d46f374ed2103b95ed492c4f4b52b Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung.kim@lge.com>
Date: Thu, 16 Aug 2012 17:03:24 +0900
Subject: [PATCH] sched/debug: Limit sd->*_idx range on sysctl

commit 201c373e8e4823700d3160d5c28e1ab18fd1193e upstream.

Various sd->*_idx's are used for refering the rq's load average table
when selecting a cpu to run.  However they can be set to any number
with sysctl knobs so that it can crash the kernel if something bad is
given. Fix it by limiting them into the actual range.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1345104204-8317-1-git-send-email-namhyung@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.2:
 - Adjust filename
 - s/umode_t/mode_t/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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