| diff --git a/avbtool b/avbtool | |
| index 81f1f7b..bcf447b 100755 | |
| --- a/avbtool | |
| +++ b/avbtool | |
| @@ -1576,7 +1576,12 @@ class AvbVBMetaHeader(object): | |
| Exception: If the given data is malformed. | |
| """ | |
| assert struct.calcsize(self.FORMAT_STRING) == self.SIZE | |
| - | |
| + if data: | |
| + if len(data)!=256: | |
| + print ('data length',len(data)) | |
| + raise AvbError('data length is not 256.') | |
| + else: | |
| + print ('data length',len(data)) | |
| if data: | |
| (self.magic, self.required_libavb_version_major, | |
| self.required_libavb_version_minor, |