From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 3 Jul 2014 23:06:57 +0000 (-0700)
Subject: lz4: add overrun checks to lz4_uncompress_unknownoutputsize()
X-Git-Tag: omap-for-v3.17/soc-cleanup~15^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4a3a99045177369700c60d074c0e525e8093b0fc;p=pandora-kernel.git

lz4: add overrun checks to lz4_uncompress_unknownoutputsize()

Jan points out that I forgot to make the needed fixes to the
lz4_uncompress_unknownoutputsize() function to mirror the changes done
in lz4_decompress() with regards to potential pointer overflows.

The only in-kernel user of this function is the zram code, which only
takes data from a valid compressed buffer that it made itself, so it's
not a big issue.  But due to external kernel modules using this
function, it's better to be safe here.

Reported-by: Jan Beulich <JBeulich@suse.com>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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