Merge branch 'linus' into sched/urgenttip-sched-urgent-2008-06-23_09.00_Mon

6 files changed, 34 insertions, 6 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 68d8df0992ab..c421a1f8f0b9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2077,6 +2077,10 @@ int netif_receive_skb(struct sk_buff *skb)
 
 	rcu_read_lock();
 
+	/* Don't receive packets in an exiting network namespace */
+	if (!net_alive(dev_net(skb->dev)))
+		goto out;
+
 #ifdef CONFIG_NET_CLS_ACT
 	if (skb->tc_verd & TC_NCLS) {
 		skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 72b4c184dd84..7c52fe277b62 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -140,6 +140,9 @@ static void cleanup_net(struct work_struct *work)
 	struct pernet_operations *ops;
 	struct net *net;
 
+	/* Be very certain incoming network packets will not find us */
+	rcu_barrier();
+
 	net = container_of(work, struct net, work);
 
 	mutex_lock(&net_mutex);
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 4e5c8615832c..17eb48b8e329 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -102,6 +102,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 	if (hdr->version != 6)
 		goto err;
 
+	/*
+	 * RFC4291 2.5.3
+	 * A packet received on an interface with a destination address
+	 * of loopback must be dropped.
+	 */
+	if (!(dev->flags & IFF_LOOPBACK) &&
+	    ipv6_addr_loopback(&hdr->daddr))
+		goto err;
+
 	skb->transport_header = skb->network_header + sizeof(*hdr);
 	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index c042ce19bd14..86e28a75267f 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -345,18 +345,21 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	case IPV6_DSTOPTS:
 	{
 		struct ipv6_txoptions *opt;
+
+		/* remove any sticky options header with a zero option
+		 * length, per RFC3542.
+		 */
 		if (optlen == 0)
 			optval = NULL;
+		else if (optlen < sizeof(struct ipv6_opt_hdr) ||
+			 optlen & 0x7 || optlen > 8 * 255)
+			goto e_inval;
 
 		/* hop-by-hop / destination options are privileged option */
 		retv = -EPERM;
 		if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
 			break;
 
-		if (optlen < sizeof(struct ipv6_opt_hdr) ||
-		    optlen & 0x7 || optlen > 8 * 255)
-			goto e_inval;
-
 		opt = ipv6_renew_options(sk, np->opt, optname,
 					 (struct ipv6_opt_hdr __user *)optval,
 					 optlen);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 28d8bd53bd3a..c80d5899f279 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1132,7 +1132,7 @@ static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
 	ieee80211_tx_handler *handler;
 	struct ieee80211_tx_data tx;
 	ieee80211_tx_result res = TX_DROP, res_prepare;
-	int ret, i;
+	int ret, i, retries = 0;
 
 	WARN_ON(__ieee80211_queue_pending(local, control->queue));
 
@@ -1216,6 +1216,13 @@ retry:
 		if (!__ieee80211_queue_stopped(local, control->queue)) {
 			clear_bit(IEEE80211_LINK_STATE_PENDING,
 				  &local->state[control->queue]);
+			retries++;
+			/*
+			 * Driver bug, it's rejecting packets but
+			 * not stopping queues.
+			 */
+			if (WARN_ON_ONCE(retries > 5))
+				goto drop;
 			goto retry;
 		}
 		memcpy(&store->control, control,
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index e7e3baf7009e..0dbcde6758ea 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4401,7 +4401,9 @@ static int sctp_getsockopt_local_addrs_old(struct sock *sk, int len,
 	if (copy_from_user(&getaddrs, optval, len))
 		return -EFAULT;
 
-	if (getaddrs.addr_num <= 0) return -EINVAL;
+	if (getaddrs.addr_num <= 0 ||
+	    getaddrs.addr_num >= (INT_MAX / sizeof(union sctp_addr)))
+		return -EINVAL;
 	/*
 	 *  For UDP-style sockets, id specifies the association to query.
 	 *  If the id field is set to the value '0' then the locally bound