!112 fix valgrind errors in xmlParseBalancedChunkMemoryRecover

From: @fly_fzc 
Reviewed-by: @xiezhipeng1 
Signed-off-by: @xiezhipeng1

backport-Revert-Fix-memory-leak-in-xmlParseBalancedChunkMemor.patch

@@ -0,0 +1,30 @@
+From a0a8059b2cadaf6bb65469ead748873c61a17ace Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Sat, 30 May 2020 15:33:03 +0200
+Subject: [PATCH] Revert "Fix memory leak in
+ xmlParseBalancedChunkMemoryRecover"
+
+This reverts commit 5a02583c7e683896d84878bd90641d8d9b0d0549.
+
+Fixes #161.
+---
+ parser.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/parser.c b/parser.c
+index 4ea8e84..4cc58b1 100644
+--- a/parser.c
++++ b/parser.c
+@@ -13785,8 +13785,7 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
+     xmlFreeParserCtxt(ctxt);
+     newDoc->intSubset = NULL;
+     newDoc->extSubset = NULL;
+-    if(doc != NULL)
+-	newDoc->oldNs = NULL;
++    newDoc->oldNs = NULL;
+     xmlFreeDoc(newDoc);
+ 
+     return(ret);
+-- 
+1.8.3.1
+

backport-xmlParseBalancedChunkMemory-must-not-be-called-with-.patch

@@ -0,0 +1,60 @@
+From 2e8cc66d8fbf573e48a37382bf354dfdbc20ef08 Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Sat, 30 May 2020 15:40:08 +0200
+Subject: [PATCH] xmlParseBalancedChunkMemory must not be called with NULL doc
+
+There is no way to avoid memory leaks without a document to hold the
+namespace list.
+---
+ parser.c | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/parser.c b/parser.c
+index 4cc58b1..046f1ce 100644
+--- a/parser.c
++++ b/parser.c
+@@ -13176,7 +13176,7 @@ xmlParseExternalEntity(xmlDocPtr doc, xmlSAXHandlerPtr sax, void *user_data,
+ 
+ /**
+  * xmlParseBalancedChunkMemory:
+- * @doc:  the document the chunk pertains to
++ * @doc:  the document the chunk pertains to (must not be NULL)
+  * @sax:  the SAX handler bloc (possibly NULL)
+  * @user_data:  The user data returned on SAX callbacks (possibly NULL)
+  * @depth:  Used for loop detection, use 0
+@@ -13628,7 +13628,7 @@ xmlParseInNodeContext(xmlNodePtr node, const char *data, int datalen,
+ #ifdef LIBXML_SAX1_ENABLED
+ /**
+  * xmlParseBalancedChunkMemoryRecover:
+- * @doc:  the document the chunk pertains to
++ * @doc:  the document the chunk pertains to (must not be NULL)
+  * @sax:  the SAX handler bloc (possibly NULL)
+  * @user_data:  The user data returned on SAX callbacks (possibly NULL)
+  * @depth:  Used for loop detection, use 0
+@@ -13700,6 +13700,7 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
+     } else {
+ 	xmlCtxtUseOptionsInternal(ctxt, XML_PARSE_NODICT, NULL);
+     }
++    /* doc == NULL is only supported for historic reasons */
+     if (doc != NULL) {
+ 	newDoc->intSubset = doc->intSubset;
+ 	newDoc->extSubset = doc->extSubset;
+@@ -13716,6 +13717,7 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
+     }
+     xmlAddChild((xmlNodePtr) newDoc, newRoot);
+     nodePush(ctxt, newRoot);
++    /* doc == NULL is only supported for historic reasons */
+     if (doc == NULL) {
+ 	ctxt->myDoc = newDoc;
+     } else {
+@@ -13785,6 +13787,7 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
+     xmlFreeParserCtxt(ctxt);
+     newDoc->intSubset = NULL;
+     newDoc->extSubset = NULL;
++    /* This leaks the namespace list if doc == NULL */
+     newDoc->oldNs = NULL;
+     xmlFreeDoc(newDoc);
+ 
+-- 
+1.8.3.1
+

libxml2.spec

@@ -1,7 +1,7 @@
 Summary: Library providing XML and HTML support
 Name: libxml2
 Version: 2.9.10
-Release: 25
+Release: 26
 License: MIT
 Group: Development/Libraries
 Source: ftp://xmlsoft.org/libxml2/libxml2-%{version}.tar.gz
@@ -116,6 +116,8 @@ Patch103:Handle-dumps-of-corrupted-documents-more-gracefully.patch
 Patch104:Remove-unused-encoding-parameter-of-HTML-output-func.patch
 Patch105:Work-around-lxml-API-abuse.patch
 Patch106:Fix-regression-in-xmlNodeDumpOutputInternal.patch
+Patch107:backport-Revert-Fix-memory-leak-in-xmlParseBalancedChunkMemor.patch
+Patch108:backport-xmlParseBalancedChunkMemory-must-not-be-called-with-.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-root
 BuildRequires: python2-devel
@@ -308,6 +310,9 @@ rm -fr %{buildroot}
 
 
 %changelog
+* Sat Feb 26 2022 fuanan <fuanan3@h-partners.com> - 2.9.10-26
+- fix valgrind errors in xmlParseBalancedChunkMemoryRecover
+
 * Sat Feb 12 2022 fuanan <fuanan3@h-partners.com> - 2.9.10-25
 - Type:bugfix
 - ID:NA