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

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/net-2.6: (27 commits)
  [INET]: Fix inet_diag dead-lock regression
  [NETNS]: Fix /proc/net breakage
  [TEXTSEARCH]: Do not allow zero length patterns in the textsearch infrastructure
  [NETFILTER]: fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK
  [NETFILTER]: xt_TCPMSS: remove network triggerable WARN_ON
  [DECNET]: dn_nl_deladdr() almost always returns no error
  [IPV6]: Restore IPv6 when MTU is big enough
  [RXRPC]: Add missing select on CRYPTO
  mac80211: rate limit wep decrypt failed messages
  rfkill: fix double-mutex-locking
  mac80211: drop unencrypted frames if encryption is expected
  mac80211: Fix behavior of ieee80211_open and ieee80211_close
  ieee80211: fix unaligned access in ieee80211_copy_snap
  mac80211: free ifsta->extra_ie and clear IEEE80211_STA_PRIVACY_INVOKED
  SCTP: Fix build issues with SCTP AUTH.
  SCTP: Fix chunk acceptance when no authenticated chunks were listed.
  SCTP: Fix the supported extensions paramter
  SCTP: Fix SCTP-AUTH to correctly add HMACS paramter.
  SCTP: Fix the number of HB transmissions.
  [TCP] illinois: Incorrect beta usage
  ...

23 files changed, 124 insertions, 84 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 7a36878241d..4f99bb86af5 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -462,7 +462,8 @@ int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
 	 */
 
-	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
+	if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
+		VLAN_DEV_INFO(dev)->flags & VLAN_FLAG_REORDER_HDR) {
 		int orig_headroom = skb_headroom(skb);
 		unsigned short veth_TCI;
 
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 93867bb6cc9..a9018287312 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -39,7 +39,7 @@ static int __init br_init(void)
 
 	err = br_fdb_init();
 	if (err)
-		goto err_out1;
+		goto err_out;
 
 	err = br_netfilter_init();
 	if (err)
@@ -65,6 +65,8 @@ err_out3:
 err_out2:
 	br_netfilter_fini();
 err_out1:
+	br_fdb_fini();
+err_out:
 	llc_sap_put(br_stp_sap);
 	return err;
 }
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 3cedd4eeeed..0ee79a726d9 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -122,6 +122,7 @@ static inline int is_link_local(const unsigned char *dest)
 struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
 {
 	const unsigned char *dest = eth_hdr(skb)->h_dest;
+	int (*rhook)(struct sk_buff *skb);
 
 	if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
 		goto drop;
@@ -147,9 +148,9 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
 
 	switch (p->state) {
 	case BR_STATE_FORWARDING:
-
-		if (br_should_route_hook) {
-			if (br_should_route_hook(skb))
+		rhook = rcu_dereference(br_should_route_hook);
+		if (rhook != NULL) {
+			if (rhook(skb))
 				return skb;
 			dest = eth_hdr(skb)->h_dest;
 		}
diff --git a/net/bridge/netfilter/ebtable_broute.c b/net/bridge/netfilter/ebtable_broute.c
index e44519ebf1d..be6f1868105 100644
--- a/net/bridge/netfilter/ebtable_broute.c
+++ b/net/bridge/netfilter/ebtable_broute.c
@@ -70,13 +70,13 @@ static int __init ebtable_broute_init(void)
 	if (ret < 0)
 		return ret;
 	/* see br_input.c */
-	br_should_route_hook = ebt_broute;
+	rcu_assign_pointer(br_should_route_hook, ebt_broute);
 	return ret;
 }
 
 static void __exit ebtable_broute_fini(void)
 {
-	br_should_route_hook = NULL;
+	rcu_assign_pointer(br_should_route_hook, NULL);
 	synchronize_net();
 	ebt_unregister_table(&broute_table);
 }
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 66e266fb590..3bc82dc83b3 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -651,16 +651,18 @@ static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 	struct dn_dev *dn_db;
 	struct ifaddrmsg *ifm;
 	struct dn_ifaddr *ifa, **ifap;
-	int err = -EADDRNOTAVAIL;
+	int err;
 
 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
 	if (err < 0)
 		goto errout;
 
+	err = -ENODEV;
 	ifm = nlmsg_data(nlh);
 	if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
 		goto errout;
 
+	err = -EADDRNOTAVAIL;
 	for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
 		if (tb[IFA_LOCAL] &&
 		    nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index a4c3c51140a..6d06f1385e2 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -144,7 +144,8 @@ static int ieee80211_copy_snap(u8 * data, u16 h_proto)
 	snap->oui[1] = oui[1];
 	snap->oui[2] = oui[2];
 
-	*(u16 *) (data + SNAP_SIZE) = htons(h_proto);
+	h_proto = htons(h_proto);
+	memcpy(data + SNAP_SIZE, &h_proto, sizeof(u16));
 
 	return SNAP_SIZE + sizeof(u16);
 }
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index b0170732b5e..e468e7a7aac 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -51,6 +51,29 @@ static struct sock *idiagnl;
 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
 	RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
 
+static DEFINE_MUTEX(inet_diag_table_mutex);
+
+static const struct inet_diag_handler *inet_diag_lock_handler(int type)
+{
+#ifdef CONFIG_KMOD
+	if (!inet_diag_table[type])
+		request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
+			       NETLINK_INET_DIAG, type);
+#endif
+
+	mutex_lock(&inet_diag_table_mutex);
+	if (!inet_diag_table[type])
+		return ERR_PTR(-ENOENT);
+
+	return inet_diag_table[type];
+}
+
+static inline void inet_diag_unlock_handler(
+	const struct inet_diag_handler *handler)
+{
+	mutex_unlock(&inet_diag_table_mutex);
+}
+
 static int inet_csk_diag_fill(struct sock *sk,
 			      struct sk_buff *skb,
 			      int ext, u32 pid, u32 seq, u16 nlmsg_flags,
@@ -235,9 +258,12 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
 	struct inet_hashinfo *hashinfo;
 	const struct inet_diag_handler *handler;
 
-	handler = inet_diag_table[nlh->nlmsg_type];
-	BUG_ON(handler == NULL);
+	handler = inet_diag_lock_handler(nlh->nlmsg_type);
+	if (!handler)
+		return -ENOENT;
+
 	hashinfo = handler->idiag_hashinfo;
+	err = -EINVAL;
 
 	if (req->idiag_family == AF_INET) {
 		sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
@@ -255,11 +281,12 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
 	}
 #endif
 	else {
-		return -EINVAL;
+		goto unlock;
 	}
 
+	err = -ENOENT;
 	if (sk == NULL)
-		return -ENOENT;
+		goto unlock;
 
 	err = -ESTALE;
 	if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
@@ -296,6 +323,8 @@ out:
 		else
 			sock_put(sk);
 	}
+unlock:
+	inet_diag_unlock_handler(handler);
 	return err;
 }
 
@@ -678,8 +707,10 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
 	const struct inet_diag_handler *handler;
 	struct inet_hashinfo *hashinfo;
 
-	handler = inet_diag_table[cb->nlh->nlmsg_type];
-	BUG_ON(handler == NULL);
+	handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
+	if (!handler)
+		goto no_handler;
+
 	hashinfo = handler->idiag_hashinfo;
 
 	s_i = cb->args[1];
@@ -743,7 +774,7 @@ skip_listen_ht:
 	}
 
 	if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
-		return skb->len;
+		goto unlock;
 
 	for (i = s_i; i < hashinfo->ehash_size; i++) {
 		struct inet_ehash_bucket *head = &hashinfo->ehash[i];
@@ -805,6 +836,9 @@ next_dying:
 done:
 	cb->args[1] = i;
 	cb->args[2] = num;
+unlock:
+	inet_diag_unlock_handler(handler);
+no_handler:
 	return skb->len;
 }
 
@@ -816,15 +850,6 @@ static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	    nlmsg_len(nlh) < hdrlen)
 		return -EINVAL;
 
-#ifdef CONFIG_KMOD
-	if (inet_diag_table[nlh->nlmsg_type] == NULL)
-		request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
-			       NETLINK_INET_DIAG, nlh->nlmsg_type);
-#endif
-
-	if (inet_diag_table[nlh->nlmsg_type] == NULL)
-		return -ENOENT;
-
 	if (nlh->nlmsg_flags & NLM_F_DUMP) {
 		if (nlmsg_attrlen(nlh, hdrlen)) {
 			struct nlattr *attr;
@@ -853,8 +878,6 @@ static void inet_diag_rcv(struct sk_buff *skb)
 	mutex_unlock(&inet_diag_mutex);
 }
 
-static DEFINE_SPINLOCK(inet_diag_register_lock);
-
 int inet_diag_register(const struct inet_diag_handler *h)
 {
 	const __u16 type = h->idiag_type;
@@ -863,13 +886,13 @@ int inet_diag_register(const struct inet_diag_handler *h)
 	if (type >= INET_DIAG_GETSOCK_MAX)
 		goto out;
 
-	spin_lock(&inet_diag_register_lock);
+	mutex_lock(&inet_diag_table_mutex);
 	err = -EEXIST;
 	if (inet_diag_table[type] == NULL) {
 		inet_diag_table[type] = h;
 		err = 0;
 	}
-	spin_unlock(&inet_diag_register_lock);
+	mutex_unlock(&inet_diag_table_mutex);
 out:
 	return err;
 }
@@ -882,11 +905,9 @@ void inet_diag_unregister(const struct inet_diag_handler *h)
 	if (type >= INET_DIAG_GETSOCK_MAX)
 		return;
 
-	spin_lock(&inet_diag_register_lock);
+	mutex_lock(&inet_diag_table_mutex);
 	inet_diag_table[type] = NULL;
-	spin_unlock(&inet_diag_register_lock);
-
-	synchronize_rcu();
+	mutex_unlock(&inet_diag_table_mutex);
 }
 EXPORT_SYMBOL_GPL(inet_diag_unregister);
 
diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index 64f1cbaf96e..5aa5f5496d6 100644
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -298,7 +298,7 @@ static u32 tcp_illinois_ssthresh(struct sock *sk)
 	struct illinois *ca = inet_csk_ca(sk);
 
 	/* Multiplicative decrease */
-	return max((tp->snd_cwnd * ca->beta) >> BETA_SHIFT, 2U);
+	return max(tp->snd_cwnd - ((tp->snd_cwnd * ca->beta) >> BETA_SHIFT), 2U);
 }
 
 
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 567664eac46..e8c347579da 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2293,6 +2293,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 				break;
 			}
 
+			if (!idev && dev->mtu >= IPV6_MIN_MTU)
+				idev = ipv6_add_dev(dev);
+
 			if (idev)
 				idev->if_flags |= IF_READY;
 		} else {
@@ -2357,12 +2360,18 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 		break;
 
 	case NETDEV_CHANGEMTU:
-		if ( idev && dev->mtu >= IPV6_MIN_MTU) {
+		if (idev && dev->mtu >= IPV6_MIN_MTU) {
 			rt6_mtu_change(dev, dev->mtu);
 			idev->cnf.mtu6 = dev->mtu;
 			break;
 		}
 
+		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
+			idev = ipv6_add_dev(dev);
+			if (idev)
+				break;
+		}
+
 		/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
 
 	case NETDEV_DOWN:
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 59350b8727e..505af1f067a 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -216,6 +216,7 @@ static int ieee80211_open(struct net_device *dev)
 			res = local->ops->start(local_to_hw(local));
 		if (res)
 			return res;
+		ieee80211_hw_config(local);
 	}
 
 	switch (sdata->type) {
@@ -232,7 +233,6 @@ static int ieee80211_open(struct net_device *dev)
 			netif_tx_unlock_bh(local->mdev);
 
 			local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
-			ieee80211_hw_config(local);
 		}
 		break;
 	case IEEE80211_IF_TYPE_STA:
@@ -334,8 +334,7 @@ static int ieee80211_stop(struct net_device *dev)
 			ieee80211_configure_filter(local);
 			netif_tx_unlock_bh(local->mdev);
 
-			local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
-			ieee80211_hw_config(local);
+			local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 		}
 		break;
 	case IEEE80211_IF_TYPE_STA:
@@ -357,6 +356,11 @@ static int ieee80211_stop(struct net_device *dev)
 			cancel_delayed_work(&local->scan_work);
 		}
 		flush_workqueue(local->hw.workqueue);
+
+		sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
+		kfree(sdata->u.sta.extra_ie);
+		sdata->u.sta.extra_ie = NULL;
+		sdata->u.sta.extra_ie_len = 0;
 		/* fall through */
 	default:
 		conf.if_id = dev->ifindex;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 428a9fcf57d..00f908d9275 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -997,7 +997,7 @@ ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
 	if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
 		     (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
 		     (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
-		     rx->sdata->drop_unencrypted &&
+		     (rx->key || rx->sdata->drop_unencrypted) &&
 		     (rx->sdata->eapol == 0 || !ieee80211_is_eapol(rx->skb)))) {
 		if (net_ratelimit())
 			printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 9bf0e1cc530..b5f3413403b 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -265,7 +265,8 @@ int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb,
 	if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen,
 				       skb->data + hdrlen + WEP_IV_LEN,
 				       len)) {
-		printk(KERN_DEBUG "WEP decrypt failed (ICV)\n");
+		if (net_ratelimit())
+			printk(KERN_DEBUG "WEP decrypt failed (ICV)\n");
 		ret = -1;
 	}
 
diff --git a/net/netfilter/xt_CONNMARK.c b/net/netfilter/xt_CONNMARK.c
index 856793e8db7..0621ca7de3b 100644
--- a/net/netfilter/xt_CONNMARK.c
+++ b/net/netfilter/xt_CONNMARK.c
@@ -86,11 +86,6 @@ checkentry(const char *tablename,
 {
 	const struct xt_connmark_target_info *matchinfo = targinfo;
 
-	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
-		printk(KERN_WARNING "can't load conntrack support for "
-				    "proto=%d\n", target->family);
-		return false;
-	}
 	if (matchinfo->mode == XT_CONNMARK_RESTORE) {
 		if (strcmp(tablename, "mangle") != 0) {
 			printk(KERN_WARNING "CONNMARK: restore can only be "
@@ -103,6 +98,11 @@ checkentry(const char *tablename,
 		printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
 		return false;
 	}
+	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+		printk(KERN_WARNING "can't load conntrack support for "
+				    "proto=%d\n", target->family);
+		return false;
+	}
 	return true;
 }
 
diff --git a/net/netfilter/xt_CONNSECMARK.c b/net/netfilter/xt_CONNSECMARK.c
index 021b5c8d20e..d8feba9bdb4 100644
--- a/net/netfilter/xt_CONNSECMARK.c
+++ b/net/netfilter/xt_CONNSECMARK.c
@@ -90,11 +90,6 @@ static bool checkentry(const char *tablename, const void *entry,
 {
 	const struct xt_connsecmark_target_info *info = targinfo;
 
-	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
-		printk(KERN_WARNING "can't load conntrack support for "
-				    "proto=%d\n", target->family);
-		return false;
-	}
 	switch (info->mode) {
 	case CONNSECMARK_SAVE:
 	case CONNSECMARK_RESTORE:
@@ -105,6 +100,11 @@ static bool checkentry(const char *tablename, const void *entry,
 		return false;
 	}
 
+	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+		printk(KERN_WARNING "can't load conntrack support for "
+				    "proto=%d\n", target->family);
+		return false;
+	}
 	return true;
 }
 
diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index 07435a602b1..8e76d1f52fb 100644
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -174,10 +174,8 @@ xt_tcpmss_target6(struct sk_buff *skb,
 
 	nexthdr = ipv6h->nexthdr;
 	tcphoff = ipv6_skip_exthdr(skb, sizeof(*ipv6h), &nexthdr);
-	if (tcphoff < 0) {
-		WARN_ON(1);
+	if (tcphoff < 0)
 		return NF_DROP;
-	}
 	ret = tcpmss_mangle_packet(skb, targinfo, tcphoff,
 				   sizeof(*ipv6h) + sizeof(struct tcphdr));
 	if (ret < 0)
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 73d60a30712..4469a7be006 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -60,11 +60,7 @@ static void rfkill_led_trigger(struct rfkill *rfkill,
 static int rfkill_toggle_radio(struct rfkill *rfkill,
 				enum rfkill_state state)
 {
-	int retval;
-
-	retval = mutex_lock_interruptible(&rfkill->mutex);
-	if (retval)
-		return retval;
+	int retval = 0;
 
 	if (state != rfkill->state) {
 		retval = rfkill->toggle_radio(rfkill->data, state);
@@ -74,7 +70,6 @@ static int rfkill_toggle_radio(struct rfkill *rfkill,
 		}
 	}
 
-	mutex_unlock(&rfkill->mutex);
 	return retval;
 }
 
@@ -158,12 +153,13 @@ static ssize_t rfkill_state_store(struct device *dev,
 	if (!capable(CAP_NET_ADMIN))
 		return -EPERM;
 
+	if (mutex_lock_interruptible(&rfkill->mutex))
+		return -ERESTARTSYS;
 	error = rfkill_toggle_radio(rfkill,
 			state ? RFKILL_STATE_ON : RFKILL_STATE_OFF);
-	if (error)
-		return error;
+	mutex_unlock(&rfkill->mutex);
 
-	return count;
+	return error ? error : count;
 }
 
 static ssize_t rfkill_claim_show(struct device *dev,
diff --git a/net/rxrpc/Kconfig b/net/rxrpc/Kconfig
index e662f1d0766..0d3103c4f11 100644
--- a/net/rxrpc/Kconfig
+++ b/net/rxrpc/Kconfig
@@ -5,6 +5,7 @@
 config AF_RXRPC
 	tristate "RxRPC session sockets"
 	depends on INET && EXPERIMENTAL
+	select CRYPTO
 	select KEYS
 	help
 	  Say Y or M here to include support for RxRPC session sockets (just
diff --git a/net/sctp/Kconfig b/net/sctp/Kconfig
index 8210f549c49..5390bc79215 100644
--- a/net/sctp/Kconfig
+++ b/net/sctp/Kconfig
@@ -6,9 +6,9 @@ menuconfig IP_SCTP
 	tristate "The SCTP Protocol (EXPERIMENTAL)"
 	depends on INET && EXPERIMENTAL
 	depends on IPV6 || IPV6=n
-	select CRYPTO if SCTP_HMAC_SHA1 || SCTP_HMAC_MD5
-	select CRYPTO_HMAC if SCTP_HMAC_SHA1 || SCTP_HMAC_MD5
-	select CRYPTO_SHA1 if SCTP_HMAC_SHA1
+	select CRYPTO
+	select CRYPTO_HMAC
+	select CRYPTO_SHA1
 	select CRYPTO_MD5 if SCTP_HMAC_MD5
 	---help---
 	  Stream Control Transmission Protocol
diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 6d5fa6bb371..97e6ebd1450 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -54,11 +54,13 @@ static struct sctp_hmac sctp_hmac_list[SCTP_AUTH_NUM_HMACS] = {
 		/* id 2 is reserved as well */
 		.hmac_id = SCTP_AUTH_HMAC_ID_RESERVED_2,
 	},
+#if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE)
 	{
 		.hmac_id = SCTP_AUTH_HMAC_ID_SHA256,
 		.hmac_name="hmac(sha256)",
 		.hmac_len = SCTP_SHA256_SIG_SIZE,
 	}
+#endif
 };
 
 
@@ -631,7 +633,7 @@ static int __sctp_auth_cid(sctp_cid_t chunk, struct sctp_chunks_param *param)
 	int found = 0;
 	int i;
 
-	if (!param)
+	if (!param || param->param_hdr.length == 0)
 		return 0;
 
 	len = ntohs(param->param_hdr.length) - sizeof(sctp_paramhdr_t);
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 5a9783c38de..f4876291bb5 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -77,6 +77,8 @@ static int sctp_process_param(struct sctp_association *asoc,
 			      union sctp_params param,
 			      const union sctp_addr *peer_addr,
 			      gfp_t gfp);
+static void *sctp_addto_param(struct sctp_chunk *chunk, int len,
+			      const void *data);
 
 /* What was the inbound interface for this chunk? */
 int sctp_chunk_iif(const struct sctp_chunk *chunk)
@@ -207,11 +209,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 
 	chunksize = sizeof(init) + addrs_len + SCTP_SAT_LEN(num_types);
 	chunksize += sizeof(ecap_param);
-	if (sctp_prsctp_enable) {
-		chunksize += sizeof(prsctp_param);
-		extensions[num_ext] = SCTP_CID_FWD_TSN;
-		num_ext += 1;
-	}
+
 	/* ADDIP: Section 4.2.7:
 	 *  An implementation supporting this extension [ADDIP] MUST list
 	 *  the ASCONF,the ASCONF-ACK, and the AUTH  chunks in its INIT and
@@ -243,7 +241,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 		if (auth_chunks->length)
 			chunksize += ntohs(auth_chunks->length);
 		else
-			auth_hmacs = NULL;
+			auth_chunks = NULL;
 
 		extensions[num_ext] = SCTP_CID_AUTH;
 		num_ext += 1;
@@ -297,7 +295,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 			    htons(sizeof(sctp_supported_ext_param_t) + num_ext);
 		sctp_addto_chunk(retval, sizeof(sctp_supported_ext_param_t),
 				&ext_param);
-		sctp_addto_chunk(retval, num_ext, extensions);
+		sctp_addto_param(retval, num_ext, extensions);
 	}
 
 	if (sctp_prsctp_enable)
@@ -371,20 +369,12 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 	if (asoc->peer.ecn_capable)
 		chunksize += sizeof(ecap_param);
 
-	/* Tell peer that we'll do PR-SCTP only if peer advertised.  */
-	if (asoc->peer.prsctp_capable) {
-		chunksize += sizeof(prsctp_param);
-		extensions[num_ext] = SCTP_CID_FWD_TSN;
-		num_ext += 1;
-	}
-
 	if (sctp_addip_enable) {
 		extensions[num_ext] = SCTP_CID_ASCONF;
 		extensions[num_ext+1] = SCTP_CID_ASCONF_ACK;
 		num_ext += 2;
 	}
 
-	chunksize += sizeof(ext_param) + num_ext;
 	chunksize += sizeof(aiparam);
 
 	if (asoc->peer.auth_capable) {
@@ -407,6 +397,9 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 		num_ext += 1;
 	}
 
+	if (num_ext)
+		chunksize += sizeof(sctp_supported_ext_param_t) + num_ext;
+
 	/* Now allocate and fill out the chunk.  */
 	retval = sctp_make_chunk(asoc, SCTP_CID_INIT_ACK, 0, chunksize);
 	if (!retval)
@@ -428,7 +421,7 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 			    htons(sizeof(sctp_supported_ext_param_t) + num_ext);
 		sctp_addto_chunk(retval, sizeof(sctp_supported_ext_param_t),
 				 &ext_param);
-		sctp_addto_chunk(retval, num_ext, extensions);
+		sctp_addto_param(retval, num_ext, extensions);
 	}
 	if (asoc->peer.prsctp_capable)
 		sctp_addto_chunk(retval, sizeof(prsctp_param), &prsctp_param);
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index b8bbb960723..5fb84778846 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -959,7 +959,7 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const struct sctp_endpoint *ep,
 {
 	struct sctp_transport *transport = (struct sctp_transport *) arg;
 
-	if (asoc->overall_error_count >= asoc->max_retrans) {
+	if (asoc->overall_error_count > asoc->max_retrans) {
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 				SCTP_ERROR(ETIMEDOUT));
 		/* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index e835da8fc09..060bba4567d 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1637,8 +1637,15 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 	mutex_lock(&u->readlock);
 
 	skb = skb_recv_datagram(sk, flags, noblock, &err);
-	if (!skb)
+	if (!skb) {
+		unix_state_lock(sk);
+		/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
+		if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
+		    (sk->sk_shutdown & RCV_SHUTDOWN))
+			err = 0;
+		unix_state_unlock(sk);
 		goto out_unlock;
+	}
 
 	wake_up_interruptible_sync(&u->peer_wait);
 
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index b702bd8a389..9a4cf2e45a1 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1344,6 +1344,7 @@ restart:
 	xfrm_nr += pols[0]->xfrm_nr;
 
 	switch (policy->action) {
+	default:
 	case XFRM_POLICY_BLOCK:
 		/* Prohibit the flow */
 		err = -EPERM;