fix null deref in xmlSchemaGetComponentTargetNs

Fix-Null-deref-in-xmlSchemaGetComponentTargetNs.patch

@@ -0,0 +1,36 @@
+From c3ae53279a37369d8b100b016126136dea05b44b Mon Sep 17 00:00:00 2001
+From: huangduirong <huangduirong@huawei.com>
+Date: Sat, 30 Oct 2021 15:21:01 +0800
+Subject: [PATCH] fix null-deref in xmlSchemaGetComponentTargetNs
+
+---
+ xmlschemas.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/xmlschemas.c b/xmlschemas.c
+index 5387c8e..17aa6df 100644
+--- a/xmlschemas.c
++++ b/xmlschemas.c
+@@ -1329,6 +1329,9 @@ xmlSchemaFormatQNameNs(xmlChar **buf, xmlNsPtr ns, const xmlChar *localName)
+ static const xmlChar *
+ xmlSchemaGetComponentName(xmlSchemaBasicItemPtr item)
+ {
++    if (item == NULL) {
++        return (NULL);
++    }
+     switch (item->type) {
+ 	case XML_SCHEMA_TYPE_ELEMENT:
+ 	    return (((xmlSchemaElementPtr) item)->name);
+@@ -1384,6 +1387,9 @@ xmlSchemaGetQNameRefTargetNs(void *ref)
+ static const xmlChar *
+ xmlSchemaGetComponentTargetNs(xmlSchemaBasicItemPtr item)
+ {
++    if (item == NULL) {
++        return (NULL);
++    }
+     switch (item->type) {
+ 	case XML_SCHEMA_TYPE_ELEMENT:
+ 	    return (((xmlSchemaElementPtr) item)->targetNamespace);
+-- 
+1.8.3.1
+

libxml2.spec

@@ -1,7 +1,7 @@
 Summary: Library providing XML and HTML support
 Name: libxml2
 Version: 2.9.10
-Release: 17
+Release: 18
 License: MIT
 Group: Development/Libraries
 Source: ftp://xmlsoft.org/libxml2/libxml2-%{version}.tar.gz
@@ -100,6 +100,7 @@ Patch87: Fix-null-pointer-deref-in-xmlXPtrRangeInsideFunction.patch
 Patch88: Stop-using-maxParserDepth-in-xpath.c.patch
 Patch89: Hardcode-maximum-XPath-recursion-depth.patch
 Patch90: Fix-XPath-recursion-limit.patch
+Patch91: Fix-Null-deref-in-xmlSchemaGetComponentTargetNs.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-root
 BuildRequires: python3-devel
@@ -260,6 +261,12 @@ rm -fr %{buildroot}
 
 
 %changelog
+* Sat Oct 30 2021 huangduirong <huangduirong@huawei.com> - 2.9.10-18
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:fix fuzz issues, fix null-deref in xmlSchemaGetComponentTargetNs
+
 * Sat Oct 23 2021 panxiaohe <panxiaohe@huawei.com> - 2.9.10-17
 - Type:bugfix
 - ID:NA