http://forum.openvz.org/index.php?t=tree&th=592&mid=3206&&rev=&reveal=

--- ./fs/proc/base.c.procstr	2006-05-11 13:05:40.000000000 +0400
+++ ./fs/proc/base.c	2006-05-17 14:33:14.000000000 +0400
@@ -1745,6 +1745,8 @@ static int get_tgid_list(int index, unsi
 		int tgid = get_task_pid_ve(p, owner);
 		if (!pid_alive(p))
 			continue;
+		if (!ve_accessible_strict(get_exec_env(), VE_TASK_INFO(p)->owner_env))
+			continue;
 		if (--index >= 0)
 			continue;
 		tgids[nr_tgids] = tgid;