libFLAC++/metadata.cpp: Fix undefined behaviour

xiph · Aug 31, 2015 · e48ca8d · e48ca8d
1 parent e5ef534
commit e48ca8d
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/libFLAC++/metadata.cpp b/src/libFLAC++/metadata.cpp
@@ -812,7 +812,8 @@ namespace FLAC {
 				entry_.length += field_name_length_;
 				memcpy(entry_.entry + entry_.length, "=", 1);
 				entry_.length += 1;
-				memcpy(entry_.entry + entry_.length, field_value_, field_value_length_);
+				if (field_value_length_ > 0)
+					memcpy(entry_.entry + entry_.length, field_value_, field_value_length_);
 				entry_.length += field_value_length_;
 				entry_.entry[entry_.length] = '\0';
 				is_valid_ = true;