Prevent array-out-of-bounds access.

107-systems · Jan 20, 2021 · 4293c36 · 4293c36
1 parent cd962a0
commit 4293c36
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/ArduinoNmeaParser.cpp b/src/ArduinoNmeaParser.cpp
@@ -106,6 +106,9 @@ void ArduinoNmeaParser::flushParserBuffer()
 
 bool ArduinoNmeaParser::isCompleteNmeaMessageInParserBuffer()
 {
+  if (_parser_buf_elems < 2)
+    return false;
+
   char const prev_last = _parser_buf[_parser_buf_elems - 2];
   char const      last = _parser_buf[_parser_buf_elems - 1];