Parser::makeStream: Don't overflow length

fixes oss-fuzz/8499

1 files changed, 2 insertions, 1 deletions

diff --git a/poppler/Parser.cc b/poppler/Parser.cc
index ce91e325..d1ddcaa2 100644
--- a/poppler/Parser.cc
+++ b/poppler/Parser.cc
@@ -261,7 +261,8 @@ Stream *Parser::makeStream(Object &&dict, Guchar *fileKey,
       // When building the xref we can't use it so use this
       // kludge for broken PDF files: just add 5k to the length, and
       // hope its enough
-      length += 5000;
+      if (length < LONG_LONG_MAX - 5000)
+        length += 5000;
     }
   }