libxml2: fix CVE-2015-7942 and CVE-2015-8035

CVE-2015-7942 libxml2: heap-based buffer overflow in xmlParseConditionalSections()
CVE-2015-8035 libxml2: DoS when parsing specially crafted XML document if XZ support is enabled

[YOCTO #8641]

(From OE-Core rev: 27de51f4ad21d9b896e7d48041e7cdf20c564a38)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-7942.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-7942.patch
new file mode 100644
index 0000000000..a5930ed29b
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-7942.patch
@@ -0,0 +1,55 @@
+libxml2: CVE-2015-7942
+
+From 9b8512337d14c8ddf662fcb98b0135f225a1c489 Mon Sep 17 00:00:00 2001
+From: Daniel Veillard <veillard@redhat.com>
+Date: Mon, 23 Feb 2015 11:29:20 +0800
+Subject: Cleanup conditional section error handling
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=744980
+
+The error handling of Conditional Section also need to be
+straightened as the structure of the document can't be
+guessed on a failure there and it's better to stop parsing
+as further errors are likely to be irrelevant.
+
+Upstream-Status: Backport
+https://git.gnome.org/browse/libxml2/patch/?id=9b8512337d14c8ddf662fcb98b0135f225a1c489
+
+[YOCTO #8641]
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+Index: libxml2-2.9.2/parser.c
+===================================================================
+--- libxml2-2.9.2.orig/parser.c
++++ libxml2-2.9.2/parser.c
+@@ -6783,6 +6783,8 @@ xmlParseConditionalSections(xmlParserCtx
+        SKIP_BLANKS;
+        if (RAW != '[') {
+            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
++           xmlStopParser(ctxt);
++           return;
+        } else {
+            if (ctxt->input->id != id) {
+                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
+@@ -6843,6 +6845,8 @@ xmlParseConditionalSections(xmlParserCtx
+        SKIP_BLANKS;
+        if (RAW != '[') {
+            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
++           xmlStopParser(ctxt);
++           return;
+        } else {
+            if (ctxt->input->id != id) {
+                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
+@@ -6898,6 +6902,8 @@ xmlParseConditionalSections(xmlParserCtx
+ 
+     } else {
+        xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID_KEYWORD, NULL);
++       xmlStopParser(ctxt);
++       return;
+     }
+ 
+     if (RAW == 0)