PDF: fix potential heap buffer overflow. Fixes https://bugs.chromium.…

…org/p/oss-fuzz/issues/detail?id=16546. Credit to OSS Fuzz
OSGeo · Aug 19, 2019 · 8c28547 · 8c28547
1 parent 069d9b8
commit 8c28547
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/gdal/frmts/pdf/pdfdataset.cpp b/gdal/frmts/pdf/pdfdataset.cpp
@@ -5039,6 +5039,8 @@ static double Get(GDALPDFObject* poObj, int nIndice)
     {
         const char* pszStr = poObj->GetString().c_str();
         size_t nLen = strlen(pszStr);
+        if( nLen == 0 )
+            return 0;
         /* cf Military_Installations_2008.pdf that has values like "96 0 0.0W" */
         char chLast = pszStr[nLen-1];
         if (chLast == 'W' || chLast == 'E' || chLast == 'N' || chLast == 'S')