libxml2: security fix CVE-2015-7941

includes:
CVE-2015-7941-1
CVE-2015-7941-2

(From OE-Core rev: e06312c71209b2e1d19c7df1434e409ad96b58be)

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>

3 files changed, 97 insertions, 0 deletions

diff --git a/meta/recipes-core/libxml/libxml2.inc b/meta/recipes-core/libxml/libxml2.inc
index 9d1d2bd257..9ebb8bbeab 100644
--- a/meta/recipes-core/libxml/libxml2.inc
+++ b/meta/recipes-core/libxml/libxml2.inc
@@ -23,6 +23,8 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
            file://libxml-m4-use-pkgconfig.patch \
            file://configure.ac-fix-cross-compiling-warning.patch \
            file://0001-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch \
+           file://CVE-2015-7941-1-Stop-parsing-on-entities-boundaries-errors.patch \
+           file://CVE-2015-7941-2-Cleanup-conditional-section-error-handling.patch \
           "
 
 BINCONFIG = "${bindir}/xml2-config"
diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-7941-1-Stop-parsing-on-entities-boundaries-errors.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-7941-1-Stop-parsing-on-entities-boundaries-errors.patch
new file mode 100644
index 0000000000..11da9f9bd9
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-7941-1-Stop-parsing-on-entities-boundaries-errors.patch
@@ -0,0 +1,39 @@
+From a7dfab7411cbf545f359dd3157e5df1eb0e7ce31 Mon Sep 17 00:00:00 2001
+From: Daniel Veillard <veillard@redhat.com>
+Date: Mon, 23 Feb 2015 11:17:35 +0800
+Subject: [PATCH] Stop parsing on entities boundaries errors
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=744980
+
+There are times, like on unterminated entities that it's preferable to
+stop parsing, even if that means less error reporting. Entities are
+feeding the parser on further processing, and if they are ill defined
+then it's possible to get the parser to bug. Also do the same on
+Conditional Sections if the input is broken, as the structure of
+the document can't be guessed.
+
+Upstream-Status: Backport
+
+CVE-2015-7941-1
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/parser.c b/parser.c
+index a8d1b67..bbe97eb 100644
+--- a/parser.c
++++ b/parser.c
+@@ -5658,6 +5658,7 @@ xmlParseEntityDecl(xmlParserCtxtPtr ctxt) {
+        if (RAW != '>') {
+            xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_NOT_FINISHED,
+                    "xmlParseEntityDecl: entity %s not terminated\n", name);
++           xmlStopParser(ctxt);
+        } else {
+            if (input != ctxt->input) {
+                xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
+-- 
+2.3.5
+
diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-7941-2-Cleanup-conditional-section-error-handling.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-7941-2-Cleanup-conditional-section-error-handling.patch
new file mode 100644
index 0000000000..b7bd960531
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-7941-2-Cleanup-conditional-section-error-handling.patch
@@ -0,0 +1,56 @@
+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: [PATCH] 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
+
+CVE-2015-7941-2
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/parser.c b/parser.c
+index bbe97eb..fe603ac 100644
+--- a/parser.c
++++ b/parser.c
+@@ -6770,6 +6770,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
+        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,
+@@ -6830,6 +6832,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
+        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,
+@@ -6885,6 +6889,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
+ 
+     } else {
+        xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID_KEYWORD, NULL);
++       xmlStopParser(ctxt);
++       return;
+     }
+ 
+     if (RAW == 0)
+-- 
+2.3.5
+