security: skip analysis if mime type failed

Author: Wenzel

hooks/security.py

@@ -82,6 +82,8 @@ def check_file(self, event):
             # checksec only supports ELF files
             return
         mime = inode.file_magic_type
+        if not mime:
+            return
         filepath = inode.path
         if re.match(r'application/x(-pie)?-(executable|sharedlib)', mime):
             self.logger.info('Checking security of %s: %s', filepath, mime)