libtinyxml: patch CVE-2021-42260

Take patch from Debian:
38db99c12e

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit 066cf35ae5)
[Fixup for styhead context]
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-support/libtinyxml/libtinyxml/CVE-2021-42260.patch

@@ -0,0 +1,27 @@
+Description: In stamp always advance the pointer if *p= 0xef
+ .
+ The current implementation only advanced if 0xef is followed
+ by two non-zero bytes. In case of malformed input (0xef should be
+ the start byte of a three byte character) this leads to an infinite
+ loop. (CVE-2021-42260)
+Origin: https://sourceforge.net/p/tinyxml/git/merge-requests/1/
+
+CVE: CVE-2021-42260
+Upstream-Status: Inactive-Upstream [lastrelease: 2011]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+
+--- a/tinyxmlparser.cpp
++++ b/tinyxmlparser.cpp
+@@ -274,6 +274,12 @@ void TiXmlParsingData::Stamp( const char* now, TiXmlEncoding encoding )
+ 						else
+ 							{ p +=3; ++col; }	// A normal character.
+ 					}
++					else
++					{
++						// TIXML_UTF_LEAD_0 (239) is the start character of a 3 byte sequence, so
++						// there is something wrong here. Just advance the pointer to evade infinite loops
++						++p;
++					}
+ 				}
+ 				else
+ 				{

meta-oe/recipes-support/libtinyxml/libtinyxml_2.6.2.bb

@@ -10,7 +10,9 @@ CVE_PRODUCT = "tinyxml"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/tinyxml/tinyxml_${@'${PV}'.replace('.', '_')}.tar.gz \
            file://enforce-use-stl.patch \
-           file://entity-encoding.patch"
+           file://entity-encoding.patch \
+           file://CVE-2021-42260.patch \
+"
 SRC_URI[md5sum] = "c1b864c96804a10526540c664ade67f0"
 SRC_URI[sha256sum] = "15bdfdcec58a7da30adc87ac2b078e4417dbe5392f3afb719f9ba6d062645593"