diff -NurpP --minimal linux-3.0.7-vs2.3.1/fs/namei.c linux-3.0.7-vs2.3.1.1/fs/namei.c
--- linux-3.0.7-vs2.3.1/fs/namei.c	2011-10-18 13:51:13.000000000 +0200
+++ linux-3.0.7-vs2.3.1.1/fs/namei.c	2011-11-15 16:32:33.000000000 +0100
@@ -222,11 +222,16 @@ static int __dx_permission(const struct 
 			if (!pid)
 				goto out;
 
+			rcu_read_lock();
 			tsk = pid_task(pid, PIDTYPE_PID);
 			vxdprintk(VXD_CBIT(tag, 0), "accessing %p[#%u]",
 				  tsk, (tsk ? vx_task_xid(tsk) : 0));
-			if (tsk && vx_check(vx_task_xid(tsk), VS_IDENT | VS_WATCH_P))
+			if (tsk &&
+				vx_check(vx_task_xid(tsk), VS_IDENT | VS_WATCH_P)) {
+				rcu_read_unlock();
 				return 0;
+			}
+			rcu_read_unlock();
 		}
 		else {
 			/* FIXME: Should we block some entries here? */