Linux pagecache.Files: Memory Usage

Converts `objects.Pointer` to `int` before storing them in the set. This
should have a substantial impact on memory, similar to those in #1758

Author: dgmcdona

volatility3/framework/plugins/linux/mountinfo.py

@@ -279,9 +279,9 @@ def get_superblocks(
             if not (sb_ptr and sb_ptr.is_readable()):
                 continue
 
-            if sb_ptr in seen_sb_ptr:
+            if int(sb_ptr) in seen_sb_ptr:
                 continue
-            seen_sb_ptr.add(sb_ptr)
+            seen_sb_ptr.add(int(sb_ptr))
 
             superblock = sb_ptr.dereference()
 

volatility3/framework/plugins/linux/pagecache.py

@@ -204,10 +204,10 @@ def _walk_dentry(
             if dentry_addr == root_dentry.vol.offset:
                 continue
 
-            if dentry_addr in seen_dentries:
+            if int(dentry_addr) in seen_dentries:
                 continue
 
-            seen_dentries.add(dentry_addr)
+            seen_dentries.add(int(dentry_addr))
 
             inode_ptr = dentry.d_inode
             if not (inode_ptr and inode_ptr.is_readable()):
@@ -283,9 +283,10 @@ def get_inodes(
                 continue
 
             # Inode already processed?
-            if root_inode_ptr in seen_inodes:
+            if int(root_inode_ptr) in seen_inodes:
                 continue
-            seen_inodes.add(root_inode_ptr)
+
+            seen_inodes.add(int(root_inode_ptr))
 
             root_path = mountpoint
 
@@ -318,9 +319,9 @@ def get_inodes(
                     continue
 
                 # Inode already processed?
-                if file_inode_ptr in seen_inodes:
+                if int(file_inode_ptr) in seen_inodes:
                     continue
-                seen_inodes.add(file_inode_ptr)
+                seen_inodes.add(int(file_inode_ptr))
 
                 if follow_symlinks:
                     file_path = cls._follow_symlink(file_inode_ptr, file_path)