Limit storage buffer size to the size of the Key-Value Store partitio…

…n size.

bk7231tools/analysis/kvstorage.py

@@ -220,7 +220,7 @@ def find_storage(data: bytes) -> Optional[Tuple[int, bytes]]:
             pos -= 32  # rewind to block start
         except ValueError:
             return None
-        return pos, data[pos:]
+        return pos, data[pos:pos+0x8000]
 
     @staticmethod
     def find_user_param_key(data: bytes) -> Optional[Tuple[int, str]]: