volshell: add MAX_TYPENAME_DISPLAY_LENGTH to stop extremely large names breaking the output

Author: eve-mem

volatility3/cli/volshell/generic.py

@@ -418,6 +418,9 @@ def display_type(
         offset: Optional[int] = None,
     ):
         """Display Type describes the members of a particular object in alphabetical order"""
+
+        MAX_TYPENAME_DISPLAY_LENGTH = 256
+
         if not isinstance(
             object,
             (str, interfaces.objects.ObjectInterface, interfaces.objects.Template),
@@ -487,6 +490,8 @@ def display_type(
                     member_type
                 )  # special case for pointers to show what they point to
                 longest_typename = max(len(member_type_name), longest_typename)
+                if longest_typename > MAX_TYPENAME_DISPLAY_LENGTH:
+                    longest_typename = MAX_TYPENAME_DISPLAY_LENGTH
 
             for member in sorted(
                 volobject.vol.members, key=lambda x: (volobject.vol.members[x][0], x)
@@ -497,6 +502,10 @@ def display_type(
                 member_type_name = self._get_type_name_with_pointer(
                     member_type
                 )  # special case for pointers to show what they point to
+                if len(member_type_name) > MAX_TYPENAME_DISPLAY_LENGTH:
+                    member_type_name = (
+                        f"{member_type_name[:MAX_TYPENAME_DISPLAY_LENGTH - 3]}..."
+                    )
                 len_typename = len(member_type_name)
                 if isinstance(volobject, interfaces.objects.ObjectInterface):
                     # We're an instance, so also display the data