Pullup ticket #5175 - requested by sevan
textproc/libxml2: security fix

Revisions pulled up:
- textproc/libxml2/Makefile.common                              1.4
- textproc/libxml2/distinfo                                     1.114
- textproc/libxml2/patches/patch-result_XPath_xptr_vidbase      1.1
- textproc/libxml2/patches/patch-test_XPath_xptr_vidbase        1.1
- textproc/libxml2/patches/patch-xpath.c                        1.1
- textproc/libxml2/patches/patch-xpointer.c                     1.4

---
   Module Name:    pkgsrc
   Committed By:   sevan
   Date:           Tue Dec 27 02:34:34 UTC 2016

   Modified Files:
           pkgsrc/textproc/libxml2: Makefile.common distinfo
   Added Files:
           pkgsrc/textproc/libxml2/patches: patch-result_XPath_xptr_vidbase
               patch-test_XPath_xptr_vidbase patch-xpath.c patch-xpointer.c

   Log Message:
   Patch for CVE-2016-4658 & CVE-2016-5131
   Bump rev


(bsiegert)

$NetBSD: patch-result_XPath_xptr_vidbase,v 1.1.2.2 2016/12/28 17:14:20 bsiegert Exp $

CVE-2016-5131
https://git.gnome.org/browse/libxml2/commit/?id=9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e

--- result/XPath/xptr/vidbase.orig	2016-12-27 02:22:25.000000000 +0000
+++ result/XPath/xptr/vidbase
@@ -17,3 +17,16 @@ Object is a Location Set:
   To node
     ELEMENT p
 
+
+========================
+Expression: xpointer(range-to(id('chapter2')))
+Object is a Location Set:
+1 :   Object is a range :
+  From node
+     /
+  To node
+    ELEMENT chapter
+      ATTRIBUTE id
+        TEXT
+          content=chapter2
+

$NetBSD: patch-test_XPath_xptr_vidbase,v 1.1.2.2 2016/12/28 17:14:20 bsiegert Exp $

CVE-2016-5131
https://git.gnome.org/browse/libxml2/commit/?id=9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e

--- test/XPath/xptr/vidbase.orig	2016-12-27 02:22:06.000000000 +0000
+++ test/XPath/xptr/vidbase
@@ -1,2 +1,3 @@
 xpointer(id('chapter1')/p)
 xpointer(id('chapter1')/p[1]/range-to(following-sibling::p[2]))
+xpointer(range-to(id('chapter2')))

$NetBSD: patch-xpath.c,v 1.1.2.2 2016/12/28 17:14:20 bsiegert Exp $

CVE-2016-5131
https://git.gnome.org/browse/libxml2/commit/?id=9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e

--- xpath.c.orig	2016-12-27 02:21:53.000000000 +0000
+++ xpath.c
@@ -10691,13 +10691,18 @@ xmlXPathCompPathExpr(xmlXPathParserConte
 		    lc = 1;
 		    break;
 		} else if ((NXT(len) == '(')) {
-		    /* Note Type or Function */
+		    /* Node Type or Function */
 		    if (xmlXPathIsNodeType(name)) {
 #ifdef DEBUG_STEP
 		        xmlGenericError(xmlGenericErrorContext,
 				"PathExpr: Type search\n");
 #endif
 			lc = 1;
+#ifdef LIBXML_XPTR_ENABLED
+                    } else if (ctxt->xptr &&
+                               xmlStrEqual(name, BAD_CAST "range-to")) {
+                        lc = 1;
+#endif
 		    } else {
 #ifdef DEBUG_STEP
 		        xmlGenericError(xmlGenericErrorContext,

$NetBSD: patch-xpointer.c,v 1.4.2.2 2016/12/28 17:14:20 bsiegert Exp $

CVE-2016-4658
https://git.gnome.org/browse/libxml2/commit/?id=c1d1f7121194036608bf555f08d3062a36fd344b

CVE-2016-5131
https://git.gnome.org/browse/libxml2/commit/?id=9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e

--- xpointer.c.orig	2016-12-27 02:19:03.000000000 +0000
+++ xpointer.c
@@ -1295,8 +1295,6 @@ xmlXPtrNewContext(xmlDocPtr doc, xmlNode
     ret->here = here;
     ret->origin = origin;
 
-    xmlXPathRegisterFunc(ret, (xmlChar *)"range-to",
-	                 xmlXPtrRangeToFunction);
     xmlXPathRegisterFunc(ret, (xmlChar *)"range",
 	                 xmlXPtrRangeFunction);
     xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside",
@@ -2206,76 +2204,14 @@ xmlXPtrRangeInsideFunction(xmlXPathParse
  * @nargs:  the number of args
  *
  * Implement the range-to() XPointer function
+ *
+ * Obsolete. range-to is not a real function but a special type of location
+ * step which is handled in xpath.c.
  */
 void
-xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) {
-    xmlXPathObjectPtr range;
-    const xmlChar *cur;
-    xmlXPathObjectPtr res, obj;
-    xmlXPathObjectPtr tmp;
-    xmlLocationSetPtr newset = NULL;
-    xmlNodeSetPtr oldset;
-    int i;
-
-    if (ctxt == NULL) return;
-    CHECK_ARITY(1);
-    /*
-     * Save the expression pointer since we will have to evaluate
-     * it multiple times. Initialize the new set.
-     */
-    CHECK_TYPE(XPATH_NODESET);
-    obj = valuePop(ctxt);
-    oldset = obj->nodesetval;
-    ctxt->context->node = NULL;
-
-    cur = ctxt->cur;
-    newset = xmlXPtrLocationSetCreate(NULL);
-
-    for (i = 0; i < oldset->nodeNr; i++) {
-	ctxt->cur = cur;
-
-	/*
-	 * Run the evaluation with a node list made of a single item
-	 * in the nodeset.
-	 */
-	ctxt->context->node = oldset->nodeTab[i];
-	tmp = xmlXPathNewNodeSet(ctxt->context->node);
-	valuePush(ctxt, tmp);
-
-	xmlXPathEvalExpr(ctxt);
-	CHECK_ERROR;
-
-	/*
-	 * The result of the evaluation need to be tested to
-	 * decided whether the filter succeeded or not
-	 */
-	res = valuePop(ctxt);
-	range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res);
-	if (range != NULL) {
-	    xmlXPtrLocationSetAdd(newset, range);
-	}
-
-	/*
-	 * Cleanup
-	 */
-	if (res != NULL)
-	    xmlXPathFreeObject(res);
-	if (ctxt->value == tmp) {
-	    res = valuePop(ctxt);
-	    xmlXPathFreeObject(res);
-	}
-
-	ctxt->context->node = NULL;
-    }
-
-    /*
-     * The result is used as the new evaluation set.
-     */
-    xmlXPathFreeObject(obj);
-    ctxt->context->node = NULL;
-    ctxt->context->contextSize = -1;
-    ctxt->context->proximityPosition = -1;
-    valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt,
+                       int nargs ATTRIBUTE_UNUSED) {
+    XP_ERROR(XPATH_EXPR_ERROR);
 }
 
 /**