Fix a potential NULL dereference
For https://bugzilla.gnome.org/show_bug.cgi?id=733040
xmlDictLookup() may return NULL in case of allocation error,
though very unlikely it need to be checked.
diff --git a/parser.c b/parser.c
index ba70f9e..ba757eb 100644
--- a/parser.c
+++ b/parser.c
@@ -9316,6 +9316,12 @@
const xmlChar *URL = xmlDictLookup(ctxt->dict, attvalue, len);
xmlURIPtr uri;
+ if (URL == NULL) {
+ xmlErrMemory(ctxt, "dictionary allocation failure");
+ if ((attvalue != NULL) && (alloc != 0))
+ xmlFree(attvalue);
+ return(NULL);
+ }
if (*URL != 0) {
uri = xmlParseURI((const char *) URL);
if (uri == NULL) {