fix underflow error found by fuzzing

9e13209d · Jeromy · 256afede · 9e13209d
Commit 9e13209d authored May 04, 2016 by Jeromy
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codec.go codec.go +2 -1

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--- a/codec.go
+++ b/codec.go
@@ -70,9 +70,10 @@ func validateBytes(b []byte) (err error) {
 			return err
 		}

-		if len(b) < size {
+		if len(b) < size || size < 0 {
 			return fmt.Errorf("invalid value for size")
 		}
+
 		b = b[size:]
 	}