Fix an out-of-bounds heap read in Type_MLU_Read():

http://seclists.org/oss-sec/2016/q3/288
https://bugzilla.redhat.com/show_bug.cgi?id=1367357

Patch copied from upstream source repository:

https://github.com/mm2/Little-CMS/commit/5ca71a7bc18b6897ab21d815d15e218e204581e2

From 5ca71a7bc18b6897ab21d815d15e218e204581e2 Mon Sep 17 00:00:00 2001
From: Marti <marti.maria@tktbrainpower.com>
Date: Mon, 15 Aug 2016 23:31:39 +0200
Subject: [PATCH] Added an extra check to MLU bounds

Thanks to Ibrahim el-sayed for spotting the bug
---
 src/cmstypes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cmstypes.c b/src/cmstypes.c
index cb61860..c7328b9 100644
--- a/src/cmstypes.c
+++ b/src/cmstypes.c
@@ -1460,6 +1460,7 @@ void *Type_MLU_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cmsU
 
         // Check for overflow
         if (Offset < (SizeOfHeader + 8)) goto Error;
+        if ((Offset + Len) > SizeOfTag + 8</td></tr></table>
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<tr><td><span title='2018-05-29 18:29:36 +0200'>2018-05-29</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=a076f19908d06b6df49f1c25c40de8838213cd71'>CODE-OF-CONDUCT: Switch to version 1.4 of the Contributor Covenant.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>