return(target);
if (ctxt->lasttext == target->content) {
+ int minSize;
- if (ctxt->lasttuse + len >= ctxt->lasttsize) {
+ /* Check for integer overflow accounting for NUL terminator. */
+ if (len >= INT_MAX - ctxt->lasttuse) {
+ xsltTransformError(ctxt, NULL, target,
+ "xsltCopyText: text allocation failed\n");
+ return(NULL);
+ }
+ minSize = ctxt->lasttuse + len + 1;
+
+ if (ctxt->lasttsize < minSize) {
xmlChar *newbuf;
int size;
+ int extra;
+
+ /* Double buffer size but increase by at least 100 bytes. */
+ extra = minSize < 100 ? 100 : minSize;
+
+ /* Check for integer overflow. */
+ if (extra > INT_MAX - ctxt->lasttsize) {
+ size = INT_MAX;
+ }
+ else {
+ size = ctxt->lasttsize + extra;
+ }
- size = ctxt->lasttsize + len + 100;
- size *= 2;
newbuf = (xmlChar *) xmlRealloc(target->content,size);
if (newbuf == NULL) {
xsltTransformError(ctxt, NULL, target,
* Speed optimization when coalescing text nodes
*/
const xmlChar *lasttext; /* last text node content */
- unsigned int lasttsize; /* last text node size */
- unsigned int lasttuse; /* last text node use */
+ int lasttsize; /* last text node size */
+ int lasttuse; /* last text node use */
/*
* Per Context Debugging
*/