AZDecoder: fix segfault (fuzz)

kurzdigital · Dec 5, 2023 · c2d0db7 · c2d0db7
1 parent 976b2ad
commit c2d0db7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/core/src/aztec/AZDecoder.cpp b/core/src/aztec/AZDecoder.cpp
@@ -323,7 +323,7 @@ DecoderResult Decode(const BitArray& bits)
 
 	// As converting character set ECIs ourselves and ignoring/skipping non-character ECIs, not using
 	// modifiers that indicate ECI protocol (ISO/IEC 24778:2008 Annex F Table F.1)
-	if (res.bytes[0] == 29) {
+	if (res.bytes.size() > 1 && res.bytes[0] == 29) {
 		res.symbology.modifier = '1'; // GS1
 		res.symbology.aiFlag = AIFlag::GS1;
 		res.erase(0, 1); // Remove FNC1