libxml2: security fix CVE-2015-5312

(From OE-Core rev: 15d05f186fbe78774c933cf93f116af1a2a8e51a)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/libxml/libxml2.inc

@@ -36,6 +36,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
            file://0001-Fix-a-bug-on-name-parsing-at-the-end-of-current-inpu.patch \
            file://0001-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch \
            file://0001-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch \
+           file://0001-CVE-2015-5312-Another-entity-expansion-issue.patch \
           "
 
 BINCONFIG = "${bindir}/xml2-config"

meta/recipes-core/libxml/libxml2/0001-CVE-2015-5312-Another-entity-expansion-issue.patch

@@ -0,0 +1,39 @@
+From 69030714cde66d525a8884bda01b9e8f0abf8e1e Mon Sep 17 00:00:00 2001
+From: David Drysdale <drysdale@google.com>
+Date: Fri, 20 Nov 2015 11:13:45 +0800
+Subject: [PATCH] CVE-2015-5312 Another entity expansion issue
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=756733
+It is one case where the code in place to detect entities expansions
+failed to exit when the situation was detected, leading to DoS
+Problem reported by Kostya Serebryany @ Google
+Patch provided by David Drysdale @ Google
+
+Upstream-Status: Backport
+
+CVE-2015-5312
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/parser.c b/parser.c
+index b7b6668..da6e729 100644
+--- a/parser.c
++++ b/parser.c
+@@ -2806,6 +2806,10 @@ xmlStringLenDecodeEntities(xmlParserCtxtPtr ctxt, const xmlChar *str, int len,
+ 			                      0, 0, 0);
+ 		ctxt->depth--;
+ 
++		if ((ctxt->lastError.code == XML_ERR_ENTITY_LOOP) ||
++		    (ctxt->lastError.code == XML_ERR_INTERNAL_ERROR))
++		    goto int_error;
++
+ 		if (rep != NULL) {
+ 		    current = rep;
+ 		    while (*current != 0) { /* non input consuming loop */
+-- 
+2.3.5
+