| diff --git a/third_party/libxml/src/parserInternals.c b/third_party/libxml/src/parserInternals.c |
| index bfc778ac1f77..286fdcea9760 100644 |
| --- src/parserInternals.c |
| +++ src/parserInternals.c |
| @@ -1369,8 +1369,13 @@ xmlNewInputStream(xmlParserCtxtPtr ctxt) { |
| * should not happen while parsing which is the situation where |
| * the id is actually needed. |
| */ |
| - if (ctxt != NULL) |
| + if (ctxt != NULL) { |
| + if (ctxt->input_id >= INT_MAX) { |
| + xmlErrMemory(ctxt, "Input ID overflow\n"); |
| + return(NULL); |
| + } |
| input->id = ctxt->input_id++; |
| + } |
| |
| return(input); |
| } |
