Handle None and Blank value for sysctl module (#24871)

Fix adds check for values provided by user for
name and value in sysctl module.
While providing name and value as in-line params,
check for blank values

Fixes #20176

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

lib/ansible/modules/system/sysctl.py

@@ -386,9 +386,21 @@ def main():
             ignoreerrors = dict(default=False, type='bool'),
             sysctl_file = dict(default='/etc/sysctl.conf', type='path')
         ),
-        supports_check_mode=True
+        supports_check_mode=True,
+        required_if=[('state', 'present', ['value'])],
     )
 
+    if module.params['name'] is None:
+        module.fail_json(msg="name can not be None")
+    if module.params['state'] == 'present' and module.params['value'] is None:
+        module.fail_json(msg="value can not be None")
+
+    # In case of in-line params
+    if module.params['name'] == '':
+        module.fail_json(msg="name can not be blank")
+    if module.params['state'] == 'present' and module.params['value'] == '':
+        module.fail_json(msg="value can not be blank")
+
     result = SysctlModule(module)
 
     module.exit_json(changed=result.changed)