[NETFILTER]: ipt action: use xt_check_target for basic verification

The targets don't do the basic verification themselves anymore so
the ipt action needs to take care of it.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/act_ipt.c

@@ -69,6 +69,11 @@ ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook)
 	DPRINTK("ipt_init_target: found %s\n", target->name);
 	t->u.kernel.target = target;
 
+	ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t),
+			      table, hook, 0, 0);
+	if (ret)
+		return ret;
+
 	if (t->u.kernel.target->checkentry
 	    && !t->u.kernel.target->checkentry(table, NULL,
 		    			       t->u.kernel.target, t->data,