This patch copied/pasted from this link:
http://git.gnome.org/browse/libxml2/patch/?id=77404b8b69bc122d12231807abf1a837d121b551
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From 77404b8b69bc122d12231807abf1a837d121b551 Mon Sep 17 00:00:00 2001
From: Chris Evans <[email protected]>
Date: Wed, 14 Dec 2011 08:18:25 +0000
Subject: Make sure the parser returns when getting a Stop order

patch backported from chromiun bug fixes, assuming author is Chris
---
diff --git a/parser.c b/parser.c
index 21d7aa3..4e5dcb9 100644
--- a/parser.c
+++ b/parser.c
@@ -4949,7 +4949,8 @@ xmlParsePI(xmlParserCtxtPtr ctxt) {
 		    (ctxt->sax->processingInstruction != NULL))
 		    ctxt->sax->processingInstruction(ctxt->userData,
 		                                     target, NULL);
-		ctxt->instate = state;
+		if (ctxt->instate != XML_PARSER_EOF)
+		    ctxt->instate = state;
 		return;
 	    }
 	    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
@@ -5029,7 +5030,8 @@ xmlParsePI(xmlParserCtxtPtr ctxt) {
 	} else {
 	    xmlFatalErr(ctxt, XML_ERR_PI_NOT_STARTED, NULL);
 	}
-	ctxt->instate = state;
+	if (ctxt->instate != XML_PARSER_EOF)
+	    ctxt->instate = state;
     }
 }
 
@@ -9589,6 +9591,8 @@ xmlParseElement(xmlParserCtxtPtr ctxt) {
     else
 	name = xmlParseStartTag(ctxt);
 #endif /* LIBXML_SAX1_ENABLED */
+    if (ctxt->instate == XML_PARSER_EOF)
+	return;
     if (name == NULL) {
 	spacePop(ctxt);
         return;
@@ -10975,6 +10979,8 @@ xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
 		else
 		    name = xmlParseStartTag(ctxt);
 #endif /* LIBXML_SAX1_ENABLED */
+		if (ctxt->instate == XML_PARSER_EOF)
+		    goto done;
 		if (name == NULL) {
 		    spacePop(ctxt);
 		    ctxt->instate = XML_PARSER_EOF;
@@ -11161,7 +11167,9 @@ xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
 		  else
 		    xmlParseEndTag1(ctxt, 0);
 #endif /* LIBXML_SAX1_ENABLED */
-		if (ctxt->nameNr == 0) {
+		if (ctxt->instate == XML_PARSER_EOF) {
+		    /* Nothing */
+		} else if (ctxt->nameNr == 0) {
 		    ctxt->instate = XML_PARSER_EPILOG;
 		} else {
 		    ctxt->instate = XML_PARSER_CONTENT;
--
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