expat: fix CVE-2018-20843

(From OE-Core rev: aad245ea1c55f8e778ae3420c5c31e94301e7cba)

Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/expat/expat/CVE-2018-20843.patch

@@ -0,0 +1,26 @@
+From 11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 Mon Sep 17 00:00:00 2001
+From: Sebastian Pipping <sebastian@pipping.org>
+Date: Wed, 12 Jun 2019 15:42:22 +0200
+Subject: [PATCH] xmlparse.c: Fix extraction of namespace prefix from XML name
+ (#186)
+
+Upstream-Status: Backport
+CVE: CVE-2018-20843
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+---
+ expat/lib/xmlparse.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
+index 30d55c5c..737d7cd2 100644
+--- a/expat/lib/xmlparse.c
++++ b/expat/lib/xmlparse.c
+@@ -6071,7 +6071,7 @@ setElementTypePrefix(XML_Parser parser, ELEMENT_TYPE *elementType)
+       else
+         poolDiscard(&dtd->pool);
+       elementType->prefix = prefix;
+-
++      break;
+     }
+   }
+   return 1;

meta/recipes-core/expat/expat_2.2.6.bb

@@ -9,6 +9,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=5b8620d98e49772d95fc1d291c26aa79"
 SRC_URI = "${SOURCEFORGE_MIRROR}/expat/expat-${PV}.tar.bz2 \
            file://autotools.patch \
            file://libtool-tag.patch \
+           file://CVE-2018-20843.patch;striplevel=2 \
 	  "
 
 SRC_URI[md5sum] = "ca047ae951b40020ac831c28859161b2"