fix zone validator

(bug caught by fuzzer)

fix zone validator
(bug caught by fuzzer)
faf8963c · Steven Allen · 877fe653 · faf8963c
Commit faf8963c authored Oct 18, 2018 by Steven Allen
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transcoders.go transcoders.go +3 -0

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--- a/transcoders.go
+++ b/transcoders.go
@@ -73,6 +73,9 @@ func ip6zoneBtS(b []byte) (string, error) {
 }

 func ip6zoneVal(b []byte) error {
+	if len(b) == 0 {
+		return fmt.Errorf("invalid length (should be > 0)")
+	}
 	// Not supported as this would break multiaddrs.
 	if bytes.IndexByte(b, '/') >= 0 {
 		return fmt.Errorf("IPv6 zone ID contains '/': %s", string(b))