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Commit a6574349 authored by David S. Miller's avatar David S. Miller
Browse files

rtnetlink: Stop using NLA_PUT*(). 



These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9a6308d7

net/core/rtnetlink.c

+35 −32
Original line number Diff line number Diff line
@@ -608,7 +608,8 @@ int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 
	for (i = 0; i < RTAX_MAX; i++) {

		if (metrics[i]) {

			valid++;

			NLA_PUT_U32(skb, i+1, metrics[i]);

			if (nla_put_u32(skb, i+1, metrics[i]))

				goto nla_put_failure;

		}

	}
@@ -808,7 +809,8 @@ static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 
		vf_port = nla_nest_start(skb, IFLA_VF_PORT);

		if (!vf_port)

			goto nla_put_failure;

		NLA_PUT_U32(skb, IFLA_PORT_VF, vf);

		if (nla_put_u32(skb, IFLA_PORT_VF, vf))

			goto nla_put_failure;

		err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);

		if (err == -EMSGSIZE)

			goto nla_put_failure;
@@ -892,25 +894,22 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
	ifm->ifi_flags = dev_get_flags(dev);

	ifm->ifi_change = change;



	NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);

	NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);

	NLA_PUT_U8(skb, IFLA_OPERSTATE,

		   netif_running(dev) ? dev->operstate : IF_OPER_DOWN);

	NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);

	NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);

	NLA_PUT_U32(skb, IFLA_GROUP, dev->group);



	if (dev->ifindex != dev->iflink)

		NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);



	if (dev->master)

		NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);



	if (dev->qdisc)

		NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);



	if (dev->ifalias)

		NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);

	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||

	    nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||

	    nla_put_u8(skb, IFLA_OPERSTATE,

		       netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||

	    nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||

	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||

	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||

	    (dev->ifindex != dev->iflink &&

	     nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||

	    (dev->master &&

	     nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||

	    (dev->qdisc &&

	     nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||

	    (dev->ifalias &&

	     nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))

		goto nla_put_failure;



	if (1) {

		struct rtnl_link_ifmap map = {
@@ -921,12 +920,14 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
			.dma         = dev->dma,

			.port        = dev->if_port,

		};

		NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);

		if (nla_put(skb, IFLA_MAP, sizeof(map), &map))

			goto nla_put_failure;

	}



	if (dev->addr_len) {

		NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);

		NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);

		if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||

		    nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))

			goto nla_put_failure;

	}



	attr = nla_reserve(skb, IFLA_STATS,
@@ -943,8 +944,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
		goto nla_put_failure;

	copy_rtnl_link_stats64(nla_data(attr), stats);



	if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF))

		NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));

	if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&

	    nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))

		goto nla_put_failure;



	if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent

	    && (ext_filter_mask & RTEXT_FILTER_VF)) {
@@ -987,12 +989,13 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
				nla_nest_cancel(skb, vfinfo);

				goto nla_put_failure;

			}

			NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);

			NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);

			NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),

				&vf_tx_rate);

			NLA_PUT(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),

				&vf_spoofchk);

			if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||

			    nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||

			    nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),

				    &vf_tx_rate) ||

			    nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),

				    &vf_spoofchk))

				goto nla_put_failure;

			nla_nest_end(skb, vf);

		}

		nla_nest_end(skb, vfinfo);