libxml2: security fix CVE-2015-7942

includes:
CVE-2015-7942
CVE-2015-7942-2

(From OE-Core rev: 4ca806d70cf65a66daab85898bcf5d682bef43d3)

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>

1 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-7942-Another-variation-of-overflow-in-Conditional-section.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-7942-Another-variation-of-overflow-in-Conditional-section.patch
new file mode 100644
index 0000000000..40082ec07f
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-7942-Another-variation-of-overflow-in-Conditional-section.patch
@@ -0,0 +1,39 @@
+From bd0526e66a56e75a18da8c15c4750db8f801c52d Mon Sep 17 00:00:00 2001
+From: Daniel Veillard <veillard@redhat.com>
+Date: Fri, 23 Oct 2015 19:02:28 +0800
+Subject: [PATCH] Another variation of overflow in Conditional sections
+
+Which happen after the previous fix to
+https://bugzilla.gnome.org/show_bug.cgi?id=756456
+
+But stopping the parser and exiting we didn't pop the intermediary entities
+and doing the SKIP there applies on an input which may be too small
+
+Upstream-Status: Backport
+
+CVE-2015-7942
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/parser.c b/parser.c
+index a65e4cc..b9217ff 100644
+--- a/parser.c
++++ b/parser.c
+@@ -6915,7 +6915,9 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
+        "All markup of the conditional section is not in the same entity\n",
+                                 NULL, NULL);
+        }
+-        SKIP(3);
++       if ((ctxt-> instate != XML_PARSER_EOF) &&
++           ((ctxt->input->cur + 3) < ctxt->input->end))
++           SKIP(3);
+     }
+ }
+ 
+-- 
+2.3.5
+