[SCHED]: Use kmemdup & kzalloc where appropriate

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

net/sched/act_ipt.c

@@ -156,10 +156,9 @@ static int tcf_ipt_init(struct rtattr *rta, struct rtattr *est,
 	    rtattr_strlcpy(tname, tb[TCA_IPT_TABLE-1], IFNAMSIZ) >= IFNAMSIZ)
 		strcpy(tname, "mangle");
 
-	t = kmalloc(td->u.target_size, GFP_KERNEL);
+	t = kmemdup(td, td->u.target_size, GFP_KERNEL);
 	if (unlikely(!t))
 		goto err2;
-	memcpy(t, td, td->u.target_size);
 
 	if ((err = ipt_init_target(t, tname, hook)) < 0)
 		goto err3;
@@ -256,13 +255,12 @@ static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int
 	** for foolproof you need to not assume this
 	*/
 
-	t = kmalloc(ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
+	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
 	if (unlikely(!t))
 		goto rtattr_failure;
 
 	c.bindcnt = ipt->tcf_bindcnt - bind;
 	c.refcnt = ipt->tcf_refcnt - ref;
-	memcpy(t, ipt->tcfi_t, ipt->tcfi_t->u.user.target_size);
 	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
 
 	RTA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);

net/sched/act_simple.c

@@ -71,11 +71,10 @@ static int tcf_simp_release(struct tcf_defact *d, int bind)
 
 static int alloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata)
 {
-	d->tcfd_defdata = kmalloc(datalen, GFP_KERNEL);
+	d->tcfd_defdata = kmemdup(defdata, datalen, GFP_KERNEL);
 	if (unlikely(!d->tcfd_defdata))
 		return -ENOMEM;
 	d->tcfd_datalen = datalen;
-	memcpy(d->tcfd_defdata, defdata, datalen);
 	return 0;
 }
 

net/sched/cls_api.c

@@ -217,7 +217,7 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 		/* Create new proto tcf */
 
 		err = -ENOBUFS;
-		if ((tp = kmalloc(sizeof(*tp), GFP_KERNEL)) == NULL)
+		if ((tp = kzalloc(sizeof(*tp), GFP_KERNEL)) == NULL)
 			goto errout;
 		err = -EINVAL;
 		tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND-1]);
@@ -247,7 +247,6 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 			kfree(tp);
 			goto errout;
 		}
-		memset(tp, 0, sizeof(*tp));
 		tp->ops = tp_ops;
 		tp->protocol = protocol;
 		tp->prio = nprio ? : tcf_auto_prio(*back);

net/sched/em_meta.c

@@ -546,10 +546,9 @@ static int meta_var_change(struct meta_value *dst, struct rtattr *rta)
 {
 	int len = RTA_PAYLOAD(rta);
 
-	dst->val = (unsigned long) kmalloc(len, GFP_KERNEL);
+	dst->val = (unsigned long)kmemdup(RTA_DATA(rta), len, GFP_KERNEL);
 	if (dst->val == 0UL)
 		return -ENOMEM;
-	memcpy((void *) dst->val, RTA_DATA(rta), len);
 	dst->len = len;
 	return 0;
 }

net/sched/em_nbyte.c

@@ -34,12 +34,10 @@ static int em_nbyte_change(struct tcf_proto *tp, void *data, int data_len,
 		return -EINVAL;
 
 	em->datalen = sizeof(*nbyte) + nbyte->len;
-	em->data = (unsigned long) kmalloc(em->datalen, GFP_KERNEL);
+	em->data = (unsigned long)kmemdup(data, em->datalen, GFP_KERNEL);
 	if (em->data == 0UL)
 		return -ENOBUFS;
 
-	memcpy((void *) em->data, data, em->datalen);
-
 	return 0;
 }
 

net/sched/ematch.c

@@ -251,12 +251,11 @@ static int tcf_em_validate(struct tcf_proto *tp,
 					goto errout;
 				em->data = *(u32 *) data;
 			} else {
-				void *v = kmalloc(data_len, GFP_KERNEL);
+				void *v = kmemdup(data, data_len, GFP_KERNEL);
 				if (v == NULL) {
 					err = -ENOBUFS;
 					goto errout;
 				}
-				memcpy(v, data, data_len);
 				em->data = (unsigned long) v;
 			}
 		}