fixes helm#11142 missing array length check on release

Signed-off-by: Arvid E. Picciani <arvid@kraud.cloud>

pkg/storage/driver/util.go

@@ -63,7 +63,7 @@ func decodeRelease(data string) (*rspb.Release, error) {
 	// For backwards compatibility with releases that were stored before
 	// compression was introduced we skip decompression if the
 	// gzip magic header is not found
-	if bytes.Equal(b[0:3], magicGzip) {
+	if len(b) > 3 && bytes.Equal(b[0:3], magicGzip) {
 		r, err := gzip.NewReader(bytes.NewReader(b))
 		if err != nil {
 			return nil, err