Merge pull request #1412 from gcmoreira/linux_task_parent_pid_fix

Linux: Fix task parent pid in several plugins

volatility3/framework/plugins/linux/psscan.py

@@ -27,8 +27,8 @@ class DescExitStateEnum(Enum):
 class PsScan(interfaces.plugins.PluginInterface):
     """Scans for processes present in a particular linux image."""
 
-    _required_framework_version = (2, 0, 0)
-    _version = (1, 0, 1)
+    _required_framework_version = (2, 13, 0)
+    _version = (1, 1, 0)
 
     @classmethod
     def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
@@ -52,10 +52,7 @@ class PsScan(interfaces.plugins.PluginInterface):
         """
         pid = task.tgid
         tid = task.pid
-        ppid = 0
-
-        if task.parent.is_readable():
-            ppid = task.parent.tgid
+        ppid = task.get_parent_pid()
         name = utility.array_to_string(task.comm)
         exit_state = DescExitStateEnum(task.exit_state).name