From: Joel Stanley <joel@jms.id.au>
Date: Thu, 24 Apr 2014 07:25:35 +0000 (+0930)
Subject: powerpc/powernv: Check sysfs size before copying
X-Git-Tag: omap-for-v3.16/pm-signed~36^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=85390378f0a6abf3bdb10c3d504d77862a2d0ec9;p=pandora-kernel.git

powerpc/powernv: Check sysfs size before copying

The sysparam code currently uses the userspace supplied number of
bytes when memcpy()ing in to a local 64-byte buffer.

Limit the maximum number of bytes by the size of the buffer.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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