From: Bill Pemberton <wfp5p@virginia.edu>
Date: Mon, 24 Sep 2012 21:02:08 +0000 (-0400)
Subject: staging: dgrp: fix potential call to strncpy with a negative number
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~74^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad0c6e367ee0d08c4caa19ad0dbd3d752bd39de0;p=pandora-kernel.git

staging: dgrp: fix potential call to strncpy with a negative number

In dgrp_receive() there is:

   desclen = ((plen - 12) > MAX_DESC_LEN) ? MAX_DESC_LEN :
   	     	      	    plen - 12;
   strncpy(nd->nd_ps_desc, b + 12, desclen);

However, it's possible for plen to be <= 12 here so we'd be passing a
negative number into the strncpy().  Fix this to not make the strncpy
call and report an error if desclen is <= 0

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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