Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (38 commits)
  ip_gre: include route header_len in max_headroom calculation
  if_tunnel.h: add missing ams/byteorder.h include
  ipv4: Don't drop redirected route cache entry unless PTMU actually expired
  net: suppress lockdep-RCU false positive in FIB trie.
  Bluetooth: Fix kernel crash on L2CAP stress tests
  Bluetooth: Convert debug files to actually use debugfs instead of sysfs
  Bluetooth: Fix potential bad memory access with sysfs files
  netfilter: ctnetlink: fix reliable event delivery if message building fails
  netlink: fix NETLINK_RECV_NO_ENOBUFS in netlink_set_err()
  NET_DMA: free skbs periodically
  netlink: fix unaligned access in nla_get_be64()
  tcp: Fix tcp_mark_head_lost() with packets == 0
  net: ipmr/ip6mr: fix potential out-of-bounds vif_table access
  KS8695: update ksp->next_rx_desc_read at the end of rx loop
  igb: Add support for 82576 ET2 Quad Port Server Adapter
  ixgbevf: Message formatting cleanups
  ixgbevf: Shorten up delay timer for watchdog task
  ixgbevf: Fix VF Stats accounting after reset
  ixgbe: Set IXGBE_RSC_CB(skb)->DMA field to zero after unmapping the address
  ixgbe: fix for real_num_tx_queues update issue
  ...

net/8021q/vlan_core.c

@@ -11,7 +11,7 @@ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
 	if (netpoll_rx(skb))
 		return NET_RX_DROP;
 
-	if (skb_bond_should_drop(skb))
+	if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
 		goto drop;
 
 	skb->skb_iif = skb->dev->ifindex;
@@ -83,7 +83,7 @@ vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
 {
 	struct sk_buff *p;
 
-	if (skb_bond_should_drop(skb))
+	if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
 		goto drop;
 
 	skb->skb_iif = skb->dev->ifindex;

net/bluetooth/hci_sysfs.c

@@ -8,8 +8,7 @@
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
-struct class *bt_class = NULL;
-EXPORT_SYMBOL_GPL(bt_class);
+static struct class *bt_class;
 
 struct dentry *bt_debugfs = NULL;
 EXPORT_SYMBOL_GPL(bt_debugfs);

net/bluetooth/l2cap.c

@@ -40,6 +40,8 @@
 #include <linux/skbuff.h>
 #include <linux/list.h>
 #include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 #include <linux/uaccess.h>
 #include <linux/crc16.h>
 #include <net/sock.h>
@@ -2830,6 +2832,11 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 			int len = cmd->len - sizeof(*rsp);
 			char req[64];
 
+			if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) {
+				l2cap_send_disconn_req(conn, sk);
+				goto done;
+			}
+
 			/* throw out any old stored conf requests */
 			result = L2CAP_CONF_SUCCESS;
 			len = l2cap_parse_conf_rsp(sk, rsp->data,
@@ -3937,31 +3944,42 @@ drop:
 	return 0;
 }
 
-static ssize_t l2cap_sysfs_show(struct class *dev,
-				struct class_attribute *attr,
-				char *buf)
+static int l2cap_debugfs_show(struct seq_file *f, void *p)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	char *str = buf;
 
 	read_lock_bh(&l2cap_sk_list.lock);
 
 	sk_for_each(sk, node, &l2cap_sk_list.head) {
 		struct l2cap_pinfo *pi = l2cap_pi(sk);
 
-		str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n",
-				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-				sk->sk_state, __le16_to_cpu(pi->psm), pi->scid,
-				pi->dcid, pi->imtu, pi->omtu, pi->sec_level);
+		seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n",
+					batostr(&bt_sk(sk)->src),
+					batostr(&bt_sk(sk)->dst),
+					sk->sk_state, __le16_to_cpu(pi->psm),
+					pi->scid, pi->dcid,
+					pi->imtu, pi->omtu, pi->sec_level);
 	}
 
 	read_unlock_bh(&l2cap_sk_list.lock);
 
-	return str - buf;
+	return 0;
 }
 
-static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL);
+static int l2cap_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, l2cap_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations l2cap_debugfs_fops = {
+	.open		= l2cap_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct dentry *l2cap_debugfs;
 
 static const struct proto_ops l2cap_sock_ops = {
 	.family		= PF_BLUETOOTH,
@@ -4021,8 +4039,12 @@ static int __init l2cap_init(void)
 		goto error;
 	}
 
-	if (class_create_file(bt_class, &class_attr_l2cap) < 0)
-		BT_ERR("Failed to create L2CAP info file");
+	if (bt_debugfs) {
+		l2cap_debugfs = debugfs_create_file("l2cap", 0444,
+					bt_debugfs, NULL, &l2cap_debugfs_fops);
+		if (!l2cap_debugfs)
+			BT_ERR("Failed to create L2CAP debug file");
+	}
 
 	BT_INFO("L2CAP ver %s", VERSION);
 	BT_INFO("L2CAP socket layer initialized");
@@ -4036,7 +4058,7 @@ error:
 
 static void __exit l2cap_exit(void)
 {
-	class_remove_file(bt_class, &class_attr_l2cap);
+	debugfs_remove(l2cap_debugfs);
 
 	if (bt_sock_unregister(BTPROTO_L2CAP) < 0)
 		BT_ERR("L2CAP socket unregistration failed");

net/bluetooth/rfcomm/core.c

@@ -33,6 +33,8 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 #include <linux/net.h>
 #include <linux/mutex.h>
 #include <linux/kthread.h>
@@ -2098,13 +2100,10 @@ static struct hci_cb rfcomm_cb = {
 	.security_cfm	= rfcomm_security_cfm
 };
 
-static ssize_t rfcomm_dlc_sysfs_show(struct class *dev,
-				     struct class_attribute *attr,
-				     char *buf)
+static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x)
 {
 	struct rfcomm_session *s;
 	struct list_head *pp, *p;
-	char *str = buf;
 
 	rfcomm_lock();
 
@@ -2114,18 +2113,32 @@ static ssize_t rfcomm_dlc_sysfs_show(struct class *dev,
 			struct sock *sk = s->sock->sk;
 			struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list);
 
-			str += sprintf(str, "%s %s %ld %d %d %d %d\n",
-					batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-					d->state, d->dlci, d->mtu, d->rx_credits, d->tx_credits);
+			seq_printf(f, "%s %s %ld %d %d %d %d\n",
+						batostr(&bt_sk(sk)->src),
+						batostr(&bt_sk(sk)->dst),
+						d->state, d->dlci, d->mtu,
+						d->rx_credits, d->tx_credits);
 		}
 	}
 
 	rfcomm_unlock();
 
-	return (str - buf);
+	return 0;
 }
 
-static CLASS_ATTR(rfcomm_dlc, S_IRUGO, rfcomm_dlc_sysfs_show, NULL);
+static int rfcomm_dlc_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rfcomm_dlc_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations rfcomm_dlc_debugfs_fops = {
+	.open		= rfcomm_dlc_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct dentry *rfcomm_dlc_debugfs;
 
 /* ---- Initialization ---- */
 static int __init rfcomm_init(void)
@@ -2142,8 +2155,12 @@ static int __init rfcomm_init(void)
 		goto unregister;
 	}
 
-	if (class_create_file(bt_class, &class_attr_rfcomm_dlc) < 0)
-		BT_ERR("Failed to create RFCOMM info file");
+	if (bt_debugfs) {
+		rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444,
+				bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops);
+		if (!rfcomm_dlc_debugfs)
+			BT_ERR("Failed to create RFCOMM debug file");
+	}
 
 	err = rfcomm_init_ttys();
 	if (err < 0)
@@ -2171,7 +2188,7 @@ unregister:
 
 static void __exit rfcomm_exit(void)
 {
-	class_remove_file(bt_class, &class_attr_rfcomm_dlc);
+	debugfs_remove(rfcomm_dlc_debugfs);
 
 	hci_unregister_cb(&rfcomm_cb);
 

net/bluetooth/rfcomm/sock.c

@@ -40,6 +40,8 @@
 #include <linux/skbuff.h>
 #include <linux/list.h>
 #include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
@@ -1061,28 +1063,38 @@ done:
 	return result;
 }
 
-static ssize_t rfcomm_sock_sysfs_show(struct class *dev,
-				      struct class_attribute *attr,
-				      char *buf)
+static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	char *str = buf;
 
 	read_lock_bh(&rfcomm_sk_list.lock);
 
 	sk_for_each(sk, node, &rfcomm_sk_list.head) {
-		str += sprintf(str, "%s %s %d %d\n",
-				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+		seq_printf(f, "%s %s %d %d\n",
+				batostr(&bt_sk(sk)->src),
+				batostr(&bt_sk(sk)->dst),
 				sk->sk_state, rfcomm_pi(sk)->channel);
 	}
 
 	read_unlock_bh(&rfcomm_sk_list.lock);
 
-	return (str - buf);
+	return 0;
 }
 
-static CLASS_ATTR(rfcomm, S_IRUGO, rfcomm_sock_sysfs_show, NULL);
+static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rfcomm_sock_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations rfcomm_sock_debugfs_fops = {
+	.open		= rfcomm_sock_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct dentry *rfcomm_sock_debugfs;
 
 static const struct proto_ops rfcomm_sock_ops = {
 	.family		= PF_BLUETOOTH,
@@ -1122,8 +1134,12 @@ int __init rfcomm_init_sockets(void)
 	if (err < 0)
 		goto error;
 
-	if (class_create_file(bt_class, &class_attr_rfcomm) < 0)
-		BT_ERR("Failed to create RFCOMM info file");
+	if (bt_debugfs) {
+		rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444,
+				bt_debugfs, NULL, &rfcomm_sock_debugfs_fops);
+		if (!rfcomm_sock_debugfs)
+			BT_ERR("Failed to create RFCOMM debug file");
+	}
 
 	BT_INFO("RFCOMM socket layer initialized");
 
@@ -1137,7 +1153,7 @@ error:
 
 void rfcomm_cleanup_sockets(void)
 {
-	class_remove_file(bt_class, &class_attr_rfcomm);
+	debugfs_remove(rfcomm_sock_debugfs);
 
 	if (bt_sock_unregister(BTPROTO_RFCOMM) < 0)
 		BT_ERR("RFCOMM socket layer unregistration failed");

net/bluetooth/sco.c

@@ -38,6 +38,8 @@
 #include <linux/socket.h>
 #include <linux/skbuff.h>
 #include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 #include <linux/list.h>
 #include <net/sock.h>
 
@@ -953,28 +955,36 @@ drop:
 	return 0;
 }
 
-static ssize_t sco_sysfs_show(struct class *dev,
-				struct class_attribute *attr,
-				char *buf)
+static int sco_debugfs_show(struct seq_file *f, void *p)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	char *str = buf;
 
 	read_lock_bh(&sco_sk_list.lock);
 
 	sk_for_each(sk, node, &sco_sk_list.head) {
-		str += sprintf(str, "%s %s %d\n",
-				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-				sk->sk_state);
+		seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src),
+				batostr(&bt_sk(sk)->dst), sk->sk_state);
 	}
 
 	read_unlock_bh(&sco_sk_list.lock);
 
-	return (str - buf);
+	return 0;
 }
 
-static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL);
+static int sco_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, sco_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations sco_debugfs_fops = {
+	.open		= sco_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct dentry *sco_debugfs;
 
 static const struct proto_ops sco_sock_ops = {
 	.family		= PF_BLUETOOTH,
@@ -1032,8 +1042,12 @@ static int __init sco_init(void)
 		goto error;
 	}
 
-	if (class_create_file(bt_class, &class_attr_sco) < 0)
-		BT_ERR("Failed to create SCO info file");
+	if (bt_debugfs) {
+		sco_debugfs = debugfs_create_file("sco", 0444,
+					bt_debugfs, NULL, &sco_debugfs_fops);
+		if (!sco_debugfs)
+			BT_ERR("Failed to create SCO debug file");
+	}
 
 	BT_INFO("SCO (Voice Link) ver %s", VERSION);
 	BT_INFO("SCO socket layer initialized");
@@ -1047,7 +1061,7 @@ error:
 
 static void __exit sco_exit(void)
 {
-	class_remove_file(bt_class, &class_attr_sco);
+	debugfs_remove(sco_debugfs);
 
 	if (bt_sock_unregister(BTPROTO_SCO) < 0)
 		BT_ERR("SCO socket unregistration failed");

net/core/dev.c

@@ -2483,6 +2483,7 @@ int netif_receive_skb(struct sk_buff *skb)
 {
 	struct packet_type *ptype, *pt_prev;
 	struct net_device *orig_dev;
+	struct net_device *master;
 	struct net_device *null_or_orig;
 	struct net_device *null_or_bond;
 	int ret = NET_RX_DROP;
@@ -2503,11 +2504,12 @@ int netif_receive_skb(struct sk_buff *skb)
 
 	null_or_orig = NULL;
 	orig_dev = skb->dev;
-	if (orig_dev->master) {
-		if (skb_bond_should_drop(skb))
+	master = ACCESS_ONCE(orig_dev->master);
+	if (master) {
+		if (skb_bond_should_drop(skb, master))
 			null_or_orig = orig_dev; /* deliver only exact match */
 		else
-			skb->dev = orig_dev->master;
+			skb->dev = master;
 	}
 
 	__get_cpu_var(netdev_rx_stat).total++;

net/ipv4/fib_trie.c

@@ -961,7 +961,9 @@ fib_find_node(struct trie *t, u32 key)
 	struct node *n;
 
 	pos = 0;
-	n = rcu_dereference(t->trie);
+	n = rcu_dereference_check(t->trie,
+				  rcu_read_lock_held() ||
+				  lockdep_rtnl_is_held());
 
 	while (n != NULL &&  NODE_TYPE(n) == T_TNODE) {
 		tn = (struct tnode *) n;

net/ipv4/ip_gre.c

@@ -810,11 +810,13 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 			tunnel->err_count = 0;
 	}
 
-	max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen;
+	max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen + rt->u.dst.header_len;
 
 	if (skb_headroom(skb) < max_headroom || skb_shared(skb)||
 	    (skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
 		struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
+		if (max_headroom > dev->needed_headroom)
+			dev->needed_headroom = max_headroom;
 		if (!new_skb) {
 			ip_rt_put(rt);
 			txq->tx_dropped++;

net/ipv4/ipmr.c

@@ -802,6 +802,9 @@ static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock)
 	int line;
 	struct mfc_cache *uc, *c, **cp;
 
+	if (mfc->mfcc_parent >= MAXVIFS)
+		return -ENFILE;
+
 	line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
 
 	for (cp = &net->ipv4.mfc_cache_array[line];

net/ipv4/route.c

@@ -1441,7 +1441,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 					dev_hold(rt->u.dst.dev);
 				if (rt->idev)
 					in_dev_hold(rt->idev);
-				rt->u.dst.obsolete	= 0;
+				rt->u.dst.obsolete	= -1;
 				rt->u.dst.lastuse	= jiffies;
 				rt->u.dst.path		= &rt->u.dst;
 				rt->u.dst.neighbour	= NULL;
@@ -1506,11 +1506,12 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
 	struct dst_entry *ret = dst;
 
 	if (rt) {
-		if (dst->obsolete) {
+		if (dst->obsolete > 0) {
 			ip_rt_put(rt);
 			ret = NULL;
 		} else if ((rt->rt_flags & RTCF_REDIRECTED) ||
-			   rt->u.dst.expires) {
+			   (rt->u.dst.expires &&
+			    time_after_eq(jiffies, rt->u.dst.expires))) {
 			unsigned hash = rt_hash(rt->fl.fl4_dst, rt->fl.fl4_src,
 						rt->fl.oif,
 						rt_genid(dev_net(dst->dev)));
@@ -1726,7 +1727,9 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
 
 static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie)
 {
-	return NULL;
+	if (rt_is_expired((struct rtable *)dst))
+		return NULL;
+	return dst;
 }
 
 static void ipv4_dst_destroy(struct dst_entry *dst)
@@ -1888,7 +1891,8 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	if (!rth)
 		goto e_nobufs;
 
-	rth->u.dst.output= ip_rt_bug;
+	rth->u.dst.output = ip_rt_bug;
+	rth->u.dst.obsolete = -1;
 
 	atomic_set(&rth->u.dst.__refcnt, 1);
 	rth->u.dst.flags= DST_HOST;
@@ -2054,6 +2058,7 @@ static int __mkroute_input(struct sk_buff *skb,
 	rth->fl.oif 	= 0;
 	rth->rt_spec_dst= spec_dst;
 
+	rth->u.dst.obsolete = -1;
 	rth->u.dst.input = ip_forward;
 	rth->u.dst.output = ip_output;
 	rth->rt_genid = rt_genid(dev_net(rth->u.dst.dev));
@@ -2218,6 +2223,7 @@ local_input:
 		goto e_nobufs;
 
 	rth->u.dst.output= ip_rt_bug;
+	rth->u.dst.obsolete = -1;
 	rth->rt_genid = rt_genid(net);
 
 	atomic_set(&rth->u.dst.__refcnt, 1);
@@ -2444,6 +2450,7 @@ static int __mkroute_output(struct rtable **result,
 	rth->rt_spec_dst= fl->fl4_src;
 
 	rth->u.dst.output=ip_output;
+	rth->u.dst.obsolete = -1;
 	rth->rt_genid = rt_genid(dev_net(dev_out));
 
 	RT_CACHE_STAT_INC(out_slow_tot);

net/ipv4/tcp.c

@@ -429,7 +429,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
 		if (tp->urg_seq == tp->copied_seq &&
 		    !sock_flag(sk, SOCK_URGINLINE) &&
 		    tp->urg_data)
-			target--;
+			target++;
 
 		/* Potential race condition. If read of tp below will
 		 * escape above sk->sk_state, we can be illegally awaken
@@ -1254,6 +1254,39 @@ static void tcp_prequeue_process(struct sock *sk)
 	tp->ucopy.memory = 0;
 }
 
+#ifdef CONFIG_NET_DMA
+static void tcp_service_net_dma(struct sock *sk, bool wait)
+{
+	dma_cookie_t done, used;
+	dma_cookie_t last_issued;
+	struct tcp_sock *tp = tcp_sk(sk);
+
+	if (!tp->ucopy.dma_chan)
+		return;
+
+	last_issued = tp->ucopy.dma_cookie;
+	dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
+
+	do {
+		if (dma_async_memcpy_complete(tp->ucopy.dma_chan,
+					      last_issued, &done,
+					      &used) == DMA_SUCCESS) {
+			/* Safe to free early-copied skbs now */
+			__skb_queue_purge(&sk->sk_async_wait_queue);
+			break;
+		} else {
+			struct sk_buff *skb;
+			while ((skb = skb_peek(&sk->sk_async_wait_queue)) &&
+			       (dma_async_is_complete(skb->dma_cookie, done,
+						      used) == DMA_SUCCESS)) {
+				__skb_dequeue(&sk->sk_async_wait_queue);
+				kfree_skb(skb);
+			}
+		}
+	} while (wait);
+}
+#endif
+
 static inline struct sk_buff *tcp_recv_skb(struct sock *sk, u32 seq, u32 *off)
 {
 	struct sk_buff *skb;
@@ -1546,6 +1579,10 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 			/* __ Set realtime policy in scheduler __ */
 		}
 
+#ifdef CONFIG_NET_DMA
+		if (tp->ucopy.dma_chan)
+			dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
+#endif
 		if (copied >= target) {
 			/* Do not sleep, just process backlog. */
 			release_sock(sk);
@@ -1554,6 +1591,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 			sk_wait_data(sk, &timeo);
 
 #ifdef CONFIG_NET_DMA
+		tcp_service_net_dma(sk, false);  /* Don't block */
 		tp->ucopy.wakeup = 0;
 #endif
 
@@ -1633,6 +1671,9 @@ do_prequeue:
 						copied = -EFAULT;
 					break;
 				}
+
+				dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
+
 				if ((offset + used) == skb->len)
 					copied_early = 1;
 
@@ -1702,27 +1743,9 @@ skip_copy:
 	}
 
 #ifdef CONFIG_NET_DMA
-	if (tp->ucopy.dma_chan) {
-		dma_cookie_t done, used;
+	tcp_service_net_dma(sk, true);  /* Wait for queue to drain */
+	tp->ucopy.dma_chan = NULL;
 
-		dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
-
-		while (dma_async_memcpy_complete(tp->ucopy.dma_chan,
-						 tp->ucopy.dma_cookie, &done,
-						 &used) == DMA_IN_PROGRESS) {
-			/* do partial cleanup of sk_async_wait_queue */
-			while ((skb = skb_peek(&sk->sk_async_wait_queue)) &&
-			       (dma_async_is_complete(skb->dma_cookie, done,
-						      used) == DMA_SUCCESS)) {
-				__skb_dequeue(&sk->sk_async_wait_queue);
-				kfree_skb(skb);
-			}
-		}
-
-		/* Safe to free early-copied skbs now */
-		__skb_queue_purge(&sk->sk_async_wait_queue);
-		tp->ucopy.dma_chan = NULL;
-	}
 	if (tp->ucopy.pinned_list) {
 		dma_unpin_iovec_pages(tp->ucopy.pinned_list);
 		tp->ucopy.pinned_list = NULL;

net/ipv4/tcp_input.c

@@ -2511,6 +2511,9 @@ static void tcp_mark_head_lost(struct sock *sk, int packets)
 	int err;
 	unsigned int mss;
 
+	if (packets == 0)
+		return;
+
 	WARN_ON(packets > tp->packets_out);
 	if (tp->lost_skb_hint) {
 		skb = tp->lost_skb_hint;

net/ipv4/tcp_ipv4.c

@@ -370,6 +370,11 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 	if (sk->sk_state == TCP_CLOSE)
 		goto out;
 
+	if (unlikely(iph->ttl < inet_sk(sk)->min_ttl)) {
+		NET_INC_STATS_BH(net, LINUX_MIB_TCPMINTTLDROP);
+		goto out;
+	}
+
 	icsk = inet_csk(sk);
 	tp = tcp_sk(sk);
 	seq = ntohl(th->seq);

net/ipv6/ip6mr.c

@@ -1113,6 +1113,9 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
 	unsigned char ttls[MAXMIFS];
 	int i;
 
+	if (mfc->mf6cc_parent >= MAXMIFS)
+		return -ENFILE;
+
 	memset(ttls, 255, MAXMIFS);
 	for (i = 0; i < MAXMIFS; i++) {
 		if (IF_ISSET(i, &mfc->mf6cc_ifset))

net/ipv6/route.c

@@ -879,7 +879,7 @@ static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie)
 
 	rt = (struct rt6_info *) dst;
 
-	if (rt && rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie))
+	if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie))
 		return dst;
 
 	return NULL;

net/netfilter/nf_conntrack_netlink.c

@@ -582,7 +582,9 @@ nla_put_failure:
 nlmsg_failure:
 	kfree_skb(skb);
 errout:
-	nfnetlink_set_err(net, 0, group, -ENOBUFS);
+	if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
+		return -ENOBUFS;
+
 	return 0;
 }
 #endif /* CONFIG_NF_CONNTRACK_EVENTS */

net/netfilter/nfnetlink.c

@@ -113,9 +113,9 @@ int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid,
 }
 EXPORT_SYMBOL_GPL(nfnetlink_send);
 
-void nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error)
+int nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error)
 {
-	netlink_set_err(net->nfnl, pid, group, error);
+	return netlink_set_err(net->nfnl, pid, group, error);
 }
 EXPORT_SYMBOL_GPL(nfnetlink_set_err);
 

net/netlink/af_netlink.c

@@ -1093,6 +1093,7 @@ static inline int do_one_set_err(struct sock *sk,
 				 struct netlink_set_err_data *p)
 {
 	struct netlink_sock *nlk = nlk_sk(sk);
+	int ret = 0;
 
 	if (sk == p->exclude_sk)
 		goto out;
@@ -1104,10 +1105,15 @@ static inline int do_one_set_err(struct sock *sk,
 	    !test_bit(p->group - 1, nlk->groups))
 		goto out;
 
+	if (p->code == ENOBUFS && nlk->flags & NETLINK_RECV_NO_ENOBUFS) {
+		ret = 1;
+		goto out;
+	}
+
 	sk->sk_err = p->code;
 	sk->sk_error_report(sk);
 out:
-	return 0;
+	return ret;
 }
 
 /**
@@ -1116,12 +1122,16 @@ out:
  * @pid: the PID of a process that we want to skip (if any)
  * @groups: the broadcast group that will notice the error
  * @code: error code, must be negative (as usual in kernelspace)
+ *
+ * This function returns the number of broadcast listeners that have set the
+ * NETLINK_RECV_NO_ENOBUFS socket option.
  */
-void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
+int netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
 {
 	struct netlink_set_err_data info;
 	struct hlist_node *node;
 	struct sock *sk;
+	int ret = 0;
 
 	info.exclude_sk = ssk;
 	info.pid = pid;
@@ -1132,9 +1142,10 @@ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
 	read_lock(&nl_table_lock);
 
 	sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
-		do_one_set_err(sk, &info);
+		ret += do_one_set_err(sk, &info);
 
 	read_unlock(&nl_table_lock);
+	return ret;
 }
 EXPORT_SYMBOL(netlink_set_err);