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

Pull networking fixes from David Miller:
 "A quick set of bug fixes after there initial networking merge:

  1) Netlink multicast group storage allocator only was tested with
     nr_groups equal to 1, make it work for other values too.  From
     Matti Vaittinen.

  2) Check build_skb() return value in macb and hip04_eth drivers, from
     Weidong Wang.

  3) Don't leak x25_asy on x25_asy_open() failure.

  4) More DMA map/unmap fixes in 3c59x from Neil Horman.

  5) Don't clobber IP skb control block during GSO segmentation, from
     Konstantin Khlebnikov.

  6) ECN helpers for ipv6 don't fixup the checksum, from Eric Dumazet.

  7) Fix SKB segment utilization estimation in xen-netback, from David
     Vrabel.

  8) Fix lockdep splat in bridge addrlist handling, from Nikolay
     Aleksandrov"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
  bgmac: Fix reversed test of build_skb() return value.
  bridge: fix lockdep addr_list_lock false positive splat
  net: smsc: Add support h8300
  xen-netback: free queues after freeing the net device
  xen-netback: delete NAPI instance when queue fails to initialize
  xen-netback: use skb to determine number of required guest Rx requests
  net: sctp: Move sequence start handling into sctp_transport_get_idx()
  ipv6: update skb->csum when CE mark is propagated
  net: phy: turn carrier off on phy attach
  net: macb: clear interrupts when disabling them
  sctp: support to lookup with ep+paddr in transport rhashtable
  net: hns: fixes no syscon error when init mdio
  dts: hisi: fixes no syscon fault when init mdio
  net: preserve IP control block during GSO segmentation
  fsl/fman: Delete one function call "put_device" in dtsec_config()
  hip04_eth: fix missing error handle for build_skb failed
  3c59x: fix another page map/single unmap imbalance
  3c59x: balance page maps and unmaps
  x25_asy: Free x25_asy on x25_asy_open() failure.
  mlxsw: fix SWITCHDEV_OBJ_ID_PORT_MDB
  ...

11 files changed, 59 insertions, 30 deletions

diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index eb76386f8d4b..75fa5013af72 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -802,7 +802,9 @@ void batadv_mcast_free(struct batadv_priv *bat_priv)
 	batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 1);
 	batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 1);
 
+	spin_lock_bh(&bat_priv->tt.commit_lock);
 	batadv_mcast_mla_tt_retract(bat_priv, NULL);
+	spin_unlock_bh(&bat_priv->tt.commit_lock);
 }
 
 /**
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 3c782a33bdac..ae6d18cafc5a 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -211,10 +211,6 @@ static void batadv_hardif_neigh_free_rcu(struct rcu_head *rcu)
 
 	hardif_neigh = container_of(rcu, struct batadv_hardif_neigh_node, rcu);
 
-	spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
-	hlist_del_init_rcu(&hardif_neigh->list);
-	spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
-
 	batadv_hardif_free_ref_now(hardif_neigh->if_incoming);
 	kfree(hardif_neigh);
 }
@@ -227,8 +223,13 @@ static void batadv_hardif_neigh_free_rcu(struct rcu_head *rcu)
 static void
 batadv_hardif_neigh_free_now(struct batadv_hardif_neigh_node *hardif_neigh)
 {
-	if (atomic_dec_and_test(&hardif_neigh->refcount))
+	if (atomic_dec_and_test(&hardif_neigh->refcount)) {
+		spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+		hlist_del_init_rcu(&hardif_neigh->list);
+		spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+
 		batadv_hardif_neigh_free_rcu(&hardif_neigh->rcu);
+	}
 }
 
 /**
@@ -238,8 +239,13 @@ batadv_hardif_neigh_free_now(struct batadv_hardif_neigh_node *hardif_neigh)
  */
 void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh)
 {
-	if (atomic_dec_and_test(&hardif_neigh->refcount))
+	if (atomic_dec_and_test(&hardif_neigh->refcount)) {
+		spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+		hlist_del_init_rcu(&hardif_neigh->list);
+		spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+
 		call_rcu(&hardif_neigh->rcu, batadv_hardif_neigh_free_rcu);
+	}
 }
 
 /**
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 5e88d3e17546..2c8095a5d824 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -28,6 +28,8 @@
 const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
 EXPORT_SYMBOL_GPL(nf_br_ops);
 
+static struct lock_class_key bridge_netdev_addr_lock_key;
+
 /* net device transmit always called with BH disabled */
 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 {
@@ -87,6 +89,11 @@ out:
 	return NETDEV_TX_OK;
 }
 
+static void br_set_lockdep_class(struct net_device *dev)
+{
+	lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
+}
+
 static int br_dev_init(struct net_device *dev)
 {
 	struct net_bridge *br = netdev_priv(dev);
@@ -99,6 +106,7 @@ static int br_dev_init(struct net_device *dev)
 	err = br_vlan_init(br);
 	if (err)
 		free_percpu(br->stats);
+	br_set_lockdep_class(dev);
 
 	return err;
 }
diff --git a/net/core/dev.c b/net/core/dev.c
index 0ca95d5d7af0..cc9e3652cf93 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2695,6 +2695,8 @@ static inline bool skb_needs_check(struct sk_buff *skb, bool tx_path)
  *
  *	It may return NULL if the skb requires no segmentation.  This is
  *	only possible when GSO is used for verifying header integrity.
+ *
+ *	Segmentation preserves SKB_SGO_CB_OFFSET bytes of previous skb cb.
  */
 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
 				  netdev_features_t features, bool tx_path)
@@ -2709,6 +2711,9 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
 			return ERR_PTR(err);
 	}
 
+	BUILD_BUG_ON(SKB_SGO_CB_OFFSET +
+		     sizeof(*SKB_GSO_CB(skb)) > sizeof(skb->cb));
+
 	SKB_GSO_CB(skb)->mac_offset = skb_headroom(skb);
 	SKB_GSO_CB(skb)->encap_level = 0;
 
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 512a44778cf2..64878efa045c 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -239,6 +239,7 @@ static int ip_finish_output_gso(struct net *net, struct sock *sk,
 	 * from host network stack.
 	 */
 	features = netif_skb_features(skb);
+	BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_SGO_CB_OFFSET);
 	segs = skb_gso_segment(skb, features & ~NETIF_F_GSO_MASK);
 	if (IS_ERR_OR_NULL(segs)) {
 		kfree_skb(skb);
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index f7fbdbabe50e..372855eeaf42 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -23,7 +23,7 @@ static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
 	struct ipv6hdr *inner_iph = ipipv6_hdr(skb);
 
 	if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
-		IP6_ECN_set_ce(inner_iph);
+		IP6_ECN_set_ce(skb, inner_iph);
 }
 
 /* Add encapsulation header.
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 8e63662c6fb0..f830326b3b1d 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -185,7 +185,7 @@ static int genl_allocate_reserve_groups(int n_groups, int *first_id)
 			}
 		}
 
-		if (id >= mc_groups_longs * BITS_PER_LONG) {
+		if (id + n_groups > mc_groups_longs * BITS_PER_LONG) {
 			unsigned long new_longs = mc_groups_longs +
 						  BITS_TO_LONGS(n_groups);
 			size_t nlen = new_longs * sizeof(unsigned long);
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 91a8b004dc51..deadfdab1bc3 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -336,12 +336,10 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
 	unsigned short gso_type = skb_shinfo(skb)->gso_type;
 	struct sw_flow_key later_key;
 	struct sk_buff *segs, *nskb;
-	struct ovs_skb_cb ovs_cb;
 	int err;
 
-	ovs_cb = *OVS_CB(skb);
+	BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET);
 	segs = __skb_gso_segment(skb, NETIF_F_SG, false);
-	*OVS_CB(skb) = ovs_cb;
 	if (IS_ERR(segs))
 		return PTR_ERR(segs);
 	if (segs == NULL)
@@ -359,7 +357,6 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
 	/* Queue all of the segments. */
 	skb = segs;
 	do {
-		*OVS_CB(skb) = ovs_cb;
 		if (gso_type & SKB_GSO_UDP && skb != segs)
 			key = &later_key;
 
diff --git a/net/sctp/input.c b/net/sctp/input.c
index d9a6e66c5c8a..b9a536b52da2 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -784,6 +784,7 @@ hit:
 
 /* rhashtable for transport */
 struct sctp_hash_cmp_arg {
+	const struct sctp_endpoint	*ep;
 	const union sctp_addr		*laddr;
 	const union sctp_addr		*paddr;
 	const struct net		*net;
@@ -797,15 +798,20 @@ static inline int sctp_hash_cmp(struct rhashtable_compare_arg *arg,
 	struct sctp_association *asoc = t->asoc;
 	const struct net *net = x->net;
 
-	if (x->laddr->v4.sin_port != htons(asoc->base.bind_addr.port))
-		return 1;
 	if (!sctp_cmp_addr_exact(&t->ipaddr, x->paddr))
 		return 1;
 	if (!net_eq(sock_net(asoc->base.sk), net))
 		return 1;
-	if (!sctp_bind_addr_match(&asoc->base.bind_addr,
-				  x->laddr, sctp_sk(asoc->base.sk)))
-		return 1;
+	if (x->ep) {
+		if (x->ep != asoc->ep)
+			return 1;
+	} else {
+		if (x->laddr->v4.sin_port != htons(asoc->base.bind_addr.port))
+			return 1;
+		if (!sctp_bind_addr_match(&asoc->base.bind_addr,
+					  x->laddr, sctp_sk(asoc->base.sk)))
+			return 1;
+	}
 
 	return 0;
 }
@@ -832,9 +838,11 @@ static inline u32 sctp_hash_key(const void *data, u32 len, u32 seed)
 	const struct sctp_hash_cmp_arg *x = data;
 	const union sctp_addr *paddr = x->paddr;
 	const struct net *net = x->net;
-	u16 lport = x->laddr->v4.sin_port;
+	u16 lport;
 	u32 addr;
 
+	lport = x->ep ? htons(x->ep->base.bind_addr.port) :
+			x->laddr->v4.sin_port;
 	if (paddr->sa.sa_family == AF_INET6)
 		addr = jhash(&paddr->v6.sin6_addr, 16, seed);
 	else
@@ -864,12 +872,9 @@ void sctp_transport_hashtable_destroy(void)
 
 void sctp_hash_transport(struct sctp_transport *t)
 {
-	struct sctp_sockaddr_entry *addr;
 	struct sctp_hash_cmp_arg arg;
 
-	addr = list_entry(t->asoc->base.bind_addr.address_list.next,
-			  struct sctp_sockaddr_entry, list);
-	arg.laddr = &addr->a;
+	arg.ep = t->asoc->ep;
 	arg.paddr = &t->ipaddr;
 	arg.net   = sock_net(t->asoc->base.sk);
 
@@ -891,6 +896,7 @@ struct sctp_transport *sctp_addrs_lookup_transport(
 				const union sctp_addr *paddr)
 {
 	struct sctp_hash_cmp_arg arg = {
+		.ep    = NULL,
 		.laddr = laddr,
 		.paddr = paddr,
 		.net   = net,
@@ -904,13 +910,15 @@ struct sctp_transport *sctp_epaddr_lookup_transport(
 				const struct sctp_endpoint *ep,
 				const union sctp_addr *paddr)
 {
-	struct sctp_sockaddr_entry *addr;
 	struct net *net = sock_net(ep->base.sk);
+	struct sctp_hash_cmp_arg arg = {
+		.ep    = ep,
+		.paddr = paddr,
+		.net   = net,
+	};
 
-	addr = list_entry(ep->base.bind_addr.address_list.next,
-			  struct sctp_sockaddr_entry, list);
-
-	return sctp_addrs_lookup_transport(net, &addr->a, paddr);
+	return rhashtable_lookup_fast(&sctp_transport_hashtable, &arg,
+				      sctp_hash_params);
 }
 
 /* Look up an association. */
diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index dfa7eeccb537..684c5b31563b 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -310,7 +310,7 @@ static struct sctp_transport *sctp_transport_get_next(struct seq_file *seq)
 static struct sctp_transport *sctp_transport_get_idx(struct seq_file *seq,
 						     loff_t pos)
 {
-	void *obj;
+	void *obj = SEQ_START_TOKEN;
 
 	while (pos && (obj = sctp_transport_get_next(seq)) && !IS_ERR(obj))
 		pos--;
@@ -347,7 +347,7 @@ static void *sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 	if (err)
 		return ERR_PTR(err);
 
-	return *pos ? sctp_transport_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return sctp_transport_get_idx(seq, *pos);
 }
 
 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
@@ -462,7 +462,7 @@ static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 	if (err)
 		return ERR_PTR(err);
 
-	return *pos ? sctp_transport_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return sctp_transport_get_idx(seq, *pos);
 }
 
 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index cc3676eb6239..ff4a91fcab9f 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -167,6 +167,8 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb
 {
 	struct sk_buff *segs;
 
+	BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_SGO_CB_OFFSET);
+	BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_SGO_CB_OFFSET);
 	segs = skb_gso_segment(skb, 0);
 	kfree_skb(skb);
 	if (IS_ERR(segs))