patch for CVE-2015-1819 Enforce the reader to run in constant memory

from https://git.gnome.org/browse/libxml2/commit/?id=213f1fe0d76d30eaed6e5853057defc43e6df2c9

+general patch refresh

1 files changed, 59 insertions, 0 deletions

diff --git a/textproc/libxml2/patches/patch-xmlreader.c b/textproc/libxml2/patches/patch-xmlreader.c
new file mode 100644
index 00000000000..6ff602006aa
--- /dev/null
+++ b/textproc/libxml2/patches/patch-xmlreader.c
@@ -0,0 +1,59 @@
+$NetBSD: patch-xmlreader.c,v 1.1 2015/04/24 11:32:29 spz Exp $
+
+patch for CVE-2015-1819 Enforce the reader to run in constant memory
+from https://git.gnome.org/browse/libxml2/commit/?id=213f1fe0d76d30eaed6e5853057defc43e6df2c9
+part 3
+
+--- xmlreader.c.orig	2014-10-06 12:05:09.000000000 +0000
++++ xmlreader.c
+@@ -2091,6 +2091,9 @@ xmlNewTextReader(xmlParserInputBufferPtr
+ 		"xmlNewTextReader : malloc failed\n");
+ 	return(NULL);
+     }
++    /* no operation on a reader should require a huge buffer */
++    xmlBufSetAllocationScheme(ret->buffer,
++			      XML_BUFFER_ALLOC_BOUNDED);
+     ret->sax = (xmlSAXHandler *) xmlMalloc(sizeof(xmlSAXHandler));
+     if (ret->sax == NULL) {
+ 	xmlBufFree(ret->buffer);
+@@ -3616,6 +3619,7 @@ xmlTextReaderConstValue(xmlTextReaderPtr
+ 	    return(((xmlNsPtr) node)->href);
+         case XML_ATTRIBUTE_NODE:{
+ 	    xmlAttrPtr attr = (xmlAttrPtr) node;
++            const xmlChar *ret;
+ 
+ 	    if ((attr->children != NULL) &&
+ 	        (attr->children->type == XML_TEXT_NODE) &&
+@@ -3629,10 +3633,21 @@ xmlTextReaderConstValue(xmlTextReaderPtr
+                                         "xmlTextReaderSetup : malloc failed\n");
+                         return (NULL);
+                     }
++		    xmlBufSetAllocationScheme(reader->buffer,
++		                              XML_BUFFER_ALLOC_BOUNDED);
+                 } else
+                     xmlBufEmpty(reader->buffer);
+ 	        xmlBufGetNodeContent(reader->buffer, node);
+-		return(xmlBufContent(reader->buffer));
++		ret = xmlBufContent(reader->buffer);
++		if (ret == NULL) {
++		    /* error on the buffer best to reallocate */
++		    xmlBufFree(reader->buffer);
++		    reader->buffer = xmlBufCreateSize(100);
++		    xmlBufSetAllocationScheme(reader->buffer,
++		                              XML_BUFFER_ALLOC_BOUNDED);
++		    ret = BAD_CAST "";
++		}
++		return(ret);
+ 	    }
+ 	    break;
+ 	}
+@@ -5131,6 +5146,9 @@ xmlTextReaderSetup(xmlTextReaderPtr read
+                         "xmlTextReaderSetup : malloc failed\n");
+         return (-1);
+     }
++    /* no operation on a reader should require a huge buffer */
++    xmlBufSetAllocationScheme(reader->buffer,
++			      XML_BUFFER_ALLOC_BOUNDED);
+     if (reader->sax == NULL)
+ 	reader->sax = (xmlSAXHandler *) xmlMalloc(sizeof(xmlSAXHandler));
+     if (reader->sax == NULL) {