1 files changed, 31 insertions, 32 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index ecb02afd52dc..2bd9c5f7627d 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -504,7 +504,7 @@ int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
 
 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
 
-static int set_operstate(struct net_device *dev, unsigned char transition, bool send_notification)
+static void set_operstate(struct net_device *dev, unsigned char transition)
 {
 	unsigned char operstate = dev->operstate;
 
@@ -527,12 +527,8 @@ static int set_operstate(struct net_device *dev, unsigned char transition, bool
 		write_lock_bh(&dev_base_lock);
 		dev->operstate = operstate;
 		write_unlock_bh(&dev_base_lock);
-
-		if (send_notification)
-			netdev_state_change(dev);
-		return 1;
-	} else
-		return 0;
+		netdev_state_change(dev);
+	}
 }
 
 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
@@ -693,10 +689,12 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_BROADCAST]	= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
 	[IFLA_MAP]		= { .len = sizeof(struct rtnl_link_ifmap) },
 	[IFLA_MTU]		= { .type = NLA_U32 },
+	[IFLA_LINK]		= { .type = NLA_U32 },
 	[IFLA_TXQLEN]		= { .type = NLA_U32 },
 	[IFLA_WEIGHT]		= { .type = NLA_U32 },
 	[IFLA_OPERSTATE]	= { .type = NLA_U8 },
 	[IFLA_LINKMODE]		= { .type = NLA_U8 },
+	[IFLA_LINKINFO]		= { .type = NLA_NESTED },
 	[IFLA_NET_NS_PID]	= { .type = NLA_U32 },
 };
 
@@ -724,6 +722,21 @@ static struct net *get_net_ns_by_pid(pid_t pid)
 	return net;
 }
 
+static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
+{
+	if (dev) {
+		if (tb[IFLA_ADDRESS] &&
+		    nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
+			return -EINVAL;
+
+		if (tb[IFLA_BROADCAST] &&
+		    nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		      struct nlattr **tb, char *ifname, int modified)
 {
@@ -826,7 +839,6 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 	if (tb[IFLA_BROADCAST]) {
 		nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
 		send_addr_notify = 1;
-		modified = 1;
 	}
 
 	if (ifm->ifi_flags || ifm->ifi_change) {
@@ -839,23 +851,16 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		dev_change_flags(dev, flags);
 	}
 
-	if (tb[IFLA_TXQLEN]) {
-		if (dev->tx_queue_len != nla_get_u32(tb[IFLA_TXQLEN])) {
-			dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
-			modified = 1;
-		}
-	}
+	if (tb[IFLA_TXQLEN])
+		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
 
 	if (tb[IFLA_OPERSTATE])
-		modified |= set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]), false);
+		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
 
 	if (tb[IFLA_LINKMODE]) {
-		if (dev->link_mode != nla_get_u8(tb[IFLA_LINKMODE])) {
-			write_lock_bh(&dev_base_lock);
-			dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
-			write_lock_bh(&dev_base_lock);
-			modified = 1;
-		}
+		write_lock_bh(&dev_base_lock);
+		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+		write_unlock_bh(&dev_base_lock);
 	}
 
 	err = 0;
@@ -869,10 +874,6 @@ errout:
 
 	if (send_addr_notify)
 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
-
-	if (modified)
-		netdev_state_change(dev);
-
 	return err;
 }
 
@@ -908,12 +909,7 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 		goto errout;
 	}
 
-	if (tb[IFLA_ADDRESS] &&
-	    nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
-		goto errout_dev;
-
-	if (tb[IFLA_BROADCAST] &&
-	    nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
+	if ((err = validate_linkmsg(dev, tb)) < 0)
 		goto errout_dev;
 
 	err = do_setlink(dev, ifm, tb, ifname, 0);
@@ -990,7 +986,7 @@ struct net_device *rtnl_create_link(struct net *net, char *ifname,
 	if (tb[IFLA_TXQLEN])
 		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
 	if (tb[IFLA_OPERSTATE])
-		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]), true);
+		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
 	if (tb[IFLA_LINKMODE])
 		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
 
@@ -1034,6 +1030,9 @@ replay:
 	else
 		dev = NULL;
 
+	if ((err = validate_linkmsg(dev, tb)) < 0)
+		return err;
+
 	if (tb[IFLA_LINKINFO]) {
 		err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
 				       tb[IFLA_LINKINFO], ifla_info_policy);