Merge remote branch 'net-current/master'

4 files changed, 22 insertions, 33 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 3d59c9bf8feb..3bccdd12a264 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -510,7 +510,8 @@ static int vlan_dev_open(struct net_device *dev)
 	if (vlan->flags & VLAN_FLAG_GVRP)
 		vlan_gvrp_request_join(dev);
 
-	netif_carrier_on(dev);
+	if (netif_carrier_ok(real_dev))
+		netif_carrier_on(dev);
 	return 0;
 
 clear_allmulti:
diff --git a/net/irda/irlan/irlan_eth.c b/net/irda/irlan/irlan_eth.c
index 9616c32d1076..5bb8353105cc 100644
--- a/net/irda/irlan/irlan_eth.c
+++ b/net/irda/irlan/irlan_eth.c
@@ -169,6 +169,7 @@ static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
 {
 	struct irlan_cb *self = netdev_priv(dev);
 	int ret;
+	unsigned int len;
 
 	/* skb headroom large enough to contain all IrDA-headers? */
 	if ((skb_headroom(skb) < self->max_header_size) || (skb_shared(skb))) {
@@ -188,6 +189,7 @@ static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
 
 	dev->trans_start = jiffies;
 
+	len = skb->len;
 	/* Now queue the packet in the transport layer */
 	if (self->use_udata)
 		ret = irttp_udata_request(self->tsap_data, skb);
@@ -209,7 +211,7 @@ static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
 		self->stats.tx_dropped++;
 	} else {
 		self->stats.tx_packets++;
-		self->stats.tx_bytes += skb->len;
+		self->stats.tx_bytes += len;
 	}
 
 	return NETDEV_TX_OK;
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 8648a9922aab..980fe4ad0016 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1406,7 +1406,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 	struct netlink_sock *nlk = nlk_sk(sk);
 	int noblock = flags&MSG_DONTWAIT;
 	size_t copied;
-	struct sk_buff *skb, *frag __maybe_unused = NULL;
+	struct sk_buff *skb, *data_skb;
 	int err;
 
 	if (flags&MSG_OOB)
@@ -1418,45 +1418,35 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 	if (skb == NULL)
 		goto out;
 
+	data_skb = skb;
+
 #ifdef CONFIG_COMPAT_NETLINK_MESSAGES
 	if (unlikely(skb_shinfo(skb)->frag_list)) {
-		bool need_compat = !!(flags & MSG_CMSG_COMPAT);
-
 		/*
-		 * If this skb has a frag_list, then here that means that
-		 * we will have to use the frag_list skb for compat tasks
-		 * and the regular skb for non-compat tasks.
+		 * If this skb has a frag_list, then here that means that we
+		 * will have to use the frag_list skb's data for compat tasks
+		 * and the regular skb's data for normal (non-compat) tasks.
 		 *
-		 * The skb might (and likely will) be cloned, so we can't
-		 * just reset frag_list and go on with things -- we need to
-		 * keep that. For the compat case that's easy -- simply get
-		 * a reference to the compat skb and free the regular one
-		 * including the frag. For the non-compat case, we need to
-		 * avoid sending the frag to the user -- so assign NULL but
-		 * restore it below before freeing the skb.
+		 * If we need to send the compat skb, assign it to the
+		 * 'data_skb' variable so that it will be used below for data
+		 * copying. We keep 'skb' for everything else, including
+		 * freeing both later.
 		 */
-		if (need_compat) {
-			struct sk_buff *compskb = skb_shinfo(skb)->frag_list;
-			skb_get(compskb);
-			kfree_skb(skb);
-			skb = compskb;
-		} else {
-			frag = skb_shinfo(skb)->frag_list;
-			skb_shinfo(skb)->frag_list = NULL;
-		}
+		if (flags & MSG_CMSG_COMPAT)
+			data_skb = skb_shinfo(skb)->frag_list;
 	}
 #endif
 
 	msg->msg_namelen = 0;
 
-	copied = skb->len;
+	copied = data_skb->len;
 	if (len < copied) {
 		msg->msg_flags |= MSG_TRUNC;
 		copied = len;
 	}
 
-	skb_reset_transport_header(skb);
-	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+	skb_reset_transport_header(data_skb);
+	err = skb_copy_datagram_iovec(data_skb, 0, msg->msg_iov, copied);
 
 	if (msg->msg_name) {
 		struct sockaddr_nl *addr = (struct sockaddr_nl *)msg->msg_name;
@@ -1476,11 +1466,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 	}
 	siocb->scm->creds = *NETLINK_CREDS(skb);
 	if (flags & MSG_TRUNC)
-		copied = skb->len;
-
-#ifdef CONFIG_COMPAT_NETLINK_MESSAGES
-	skb_shinfo(skb)->frag_list = frag;
-#endif
+		copied = data_skb->len;
 
 	skb_free_datagram(sk, skb);
 
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 795a00b7f2cb..c93588c2d553 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -297,7 +297,7 @@ static int rds_still_queued(struct rds_sock *rs, struct rds_incoming *inc,
 int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msghdr)
 {
 	struct rds_notifier *notifier;
-	struct rds_rdma_notify cmsg;
+	struct rds_rdma_notify cmsg = { 0 }; /* fill holes with zero */
 	unsigned int count = 0, max_messages = ~0U;
 	unsigned long flags;
 	LIST_HEAD(copy);