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fuzz: Cap URL size

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Cap URL size to avoid quadratic behavior when generating error messages.
This commit is contained in:
Nick Wellnhofer
2024-01-07 15:19:58 +01:00
parent 83c1ae13d8
commit fd801845c8
1 changed files with 8 additions and 3 deletions
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11
fuzz/fuzz.c
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@@ -304,16 +304,21 @@ xmlFuzzReadEntities(void) {
while (1) { while (1) {
const char *url, *entity; const char *url, *entity;
size_t entitySize; size_t urlSize, entitySize;
xmlFuzzEntityInfo *entityInfo; xmlFuzzEntityInfo *entityInfo;
url = xmlFuzzReadString(NULL); url = xmlFuzzReadString(&urlSize);
if (url == NULL) break; if (url == NULL) break;
entity = xmlFuzzReadString(&entitySize); entity = xmlFuzzReadString(&entitySize);
if (entity == NULL) break; if (entity == NULL) break;
if (xmlHashLookup(fuzzData.entities, (xmlChar *)url) == NULL) { /*
* Cap URL size to avoid quadratic behavior when generating
* error messages or looking up entities.
*/
if (urlSize < 50 &&
xmlHashLookup(fuzzData.entities, (xmlChar *)url) == NULL) {
entityInfo = xmlMalloc(sizeof(xmlFuzzEntityInfo)); entityInfo = xmlMalloc(sizeof(xmlFuzzEntityInfo));
if (entityInfo == NULL) if (entityInfo == NULL)
break; break;