I believe this should be backported to all stable branches:

commit d63c7dd5bcb9441af0526d370c43a65ca2c980d9
Author: Insu Yun <wuninsu@gmail.com>
Date:   Wed Jan 6 12:44:01 2016 -0500

    ipr: Fix out-of-bounds null overwrite

It needs a fix-up:

commit 21b81716c6bff24cda52dc75588455f879ddbfe9
Author: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com>
Date:   Thu Feb 25 13:54:20 2016 -0300

    ipr: Fix regression when loading firmware

(which was properly tagged for stable).

Ben.

-- 
Ben Hutchings
Humans are not rational beings; they are rationalising beings.