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- 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);
- }
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