Merging upstream version 6.8.11.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

62 files changed, 426 insertions, 230 deletions

diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index f001582345..9404dd551d 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -478,6 +478,8 @@ static struct sk_buff *vlan_gro_receive(struct list_head *head,
 	if (unlikely(!vhdr))
 		goto out;
 
+	NAPI_GRO_CB(skb)->network_offsets[NAPI_GRO_CB(skb)->encap_mark] = hlen;
+
 	type = vhdr->h_vlan_encapsulated_proto;
 
 	ptype = gro_find_receive_by_type(type);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 18f97b2288..9a369bc14f 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -909,11 +909,37 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 {
 	struct hci_conn *conn;
 
+	switch (type) {
+	case ACL_LINK:
+		if (!hdev->acl_mtu)
+			return ERR_PTR(-ECONNREFUSED);
+		break;
+	case ISO_LINK:
+		if (hdev->iso_mtu)
+			/* Dedicated ISO Buffer exists */
+			break;
+		fallthrough;
+	case LE_LINK:
+		if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
+			return ERR_PTR(-ECONNREFUSED);
+		if (!hdev->le_mtu && hdev->acl_mtu < HCI_MIN_LE_MTU)
+			return ERR_PTR(-ECONNREFUSED);
+		break;
+	case SCO_LINK:
+	case ESCO_LINK:
+		if (!hdev->sco_pkts)
+			/* Controller does not support SCO or eSCO over HCI */
+			return ERR_PTR(-ECONNREFUSED);
+		break;
+	default:
+		return ERR_PTR(-ECONNREFUSED);
+	}
+
 	bt_dev_dbg(hdev, "dst %pMR handle 0x%4.4x", dst, handle);
 
 	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
 	if (!conn)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	bacpy(&conn->dst, dst);
 	bacpy(&conn->src, &hdev->bdaddr);
@@ -944,10 +970,12 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 	switch (type) {
 	case ACL_LINK:
 		conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
+		conn->mtu = hdev->acl_mtu;
 		break;
 	case LE_LINK:
 		/* conn->src should reflect the local identity address */
 		hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
+		conn->mtu = hdev->le_mtu ? hdev->le_mtu : hdev->acl_mtu;
 		break;
 	case ISO_LINK:
 		/* conn->src should reflect the local identity address */
@@ -959,6 +987,8 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 		else if (conn->role == HCI_ROLE_MASTER)
 			conn->cleanup = cis_cleanup;
 
+		conn->mtu = hdev->iso_mtu ? hdev->iso_mtu :
+			    hdev->le_mtu ? hdev->le_mtu : hdev->acl_mtu;
 		break;
 	case SCO_LINK:
 		if (lmp_esco_capable(hdev))
@@ -966,9 +996,12 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 					(hdev->esco_type & EDR_ESCO_MASK);
 		else
 			conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
+
+		conn->mtu = hdev->sco_mtu;
 		break;
 	case ESCO_LINK:
 		conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
+		conn->mtu = hdev->sco_mtu;
 		break;
 	}
 
@@ -1011,7 +1044,7 @@ struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
 
 	handle = hci_conn_hash_alloc_unset(hdev);
 	if (unlikely(handle < 0))
-		return NULL;
+		return ERR_PTR(-ECONNREFUSED);
 
 	return hci_conn_add(hdev, type, dst, role, handle);
 }
@@ -1317,8 +1350,8 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 		bacpy(&conn->dst, dst);
 	} else {
 		conn = hci_conn_add_unset(hdev, LE_LINK, dst, role);
-		if (!conn)
-			return ERR_PTR(-ENOMEM);
+		if (IS_ERR(conn))
+			return conn;
 		hci_conn_hold(conn);
 		conn->pending_sec_level = sec_level;
 	}
@@ -1494,8 +1527,8 @@ static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
 		return ERR_PTR(-EADDRINUSE);
 
 	conn = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
-	if (!conn)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(conn))
+		return conn;
 
 	conn->state = BT_CONNECT;
 
@@ -1538,8 +1571,8 @@ struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 	BT_DBG("requesting refresh of dst_addr");
 
 	conn = hci_conn_add_unset(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
-	if (!conn)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(conn))
+		return conn;
 
 	if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
 		hci_conn_del(conn);
@@ -1586,8 +1619,8 @@ struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
 	if (!acl) {
 		acl = hci_conn_add_unset(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
-		if (!acl)
-			return ERR_PTR(-ENOMEM);
+		if (IS_ERR(acl))
+			return acl;
 	}
 
 	hci_conn_hold(acl);
@@ -1655,9 +1688,9 @@ struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
 	if (!sco) {
 		sco = hci_conn_add_unset(hdev, type, dst, HCI_ROLE_MASTER);
-		if (!sco) {
+		if (IS_ERR(sco)) {
 			hci_conn_drop(acl);
-			return ERR_PTR(-ENOMEM);
+			return sco;
 		}
 	}
 
@@ -1847,8 +1880,8 @@ struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
 				       qos->ucast.cis);
 	if (!cis) {
 		cis = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
-		if (!cis)
-			return ERR_PTR(-ENOMEM);
+		if (IS_ERR(cis))
+			return cis;
 		cis->cleanup = cis_cleanup;
 		cis->dst_type = dst_type;
 		cis->iso_qos.ucast.cig = BT_ISO_QOS_CIG_UNSET;
@@ -1983,14 +2016,8 @@ static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
 			      struct bt_iso_io_qos *qos, __u8 phy)
 {
 	/* Only set MTU if PHY is enabled */
-	if (!qos->sdu && qos->phy) {
-		if (hdev->iso_mtu > 0)
-			qos->sdu = hdev->iso_mtu;
-		else if (hdev->le_mtu > 0)
-			qos->sdu = hdev->le_mtu;
-		else
-			qos->sdu = hdev->acl_mtu;
-	}
+	if (!qos->sdu && qos->phy)
+		qos->sdu = conn->mtu;
 
 	/* Use the same PHY as ACL if set to any */
 	if (qos->phy == BT_ISO_PHY_ANY)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 0592369579..befe645d3f 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2736,8 +2736,6 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
 	hci_unregister_suspend_notifier(hdev);
 
-	msft_unregister(hdev);
-
 	hci_dev_do_close(hdev);
 
 	if (!test_bit(HCI_INIT, &hdev->flags) &&
@@ -2791,6 +2789,7 @@ void hci_release_dev(struct hci_dev *hdev)
 	hci_discovery_filter_clear(hdev);
 	hci_blocked_keys_clear(hdev);
 	hci_codec_list_clear(&hdev->local_codecs);
+	msft_release(hdev);
 	hci_dev_unlock(hdev);
 
 	ida_destroy(&hdev->unset_handle_ida);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 9d1063c51e..c19d78e5d2 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -954,6 +954,9 @@ static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
 	BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
 	       hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
 
+	if (!hdev->acl_mtu || !hdev->acl_pkts)
+		return HCI_ERROR_INVALID_PARAMETERS;
+
 	return rp->status;
 }
 
@@ -1263,6 +1266,9 @@ static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
 
 	BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
 
+	if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
+		return HCI_ERROR_INVALID_PARAMETERS;
+
 	return rp->status;
 }
 
@@ -2342,8 +2348,8 @@ static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
 		if (!conn) {
 			conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
 						  HCI_ROLE_MASTER);
-			if (!conn)
-				bt_dev_err(hdev, "no memory for new connection");
+			if (IS_ERR(conn))
+				bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
 		}
 	}
 
@@ -3154,8 +3160,8 @@ static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
 						      BDADDR_BREDR)) {
 			conn = hci_conn_add_unset(hdev, ev->link_type,
 						  &ev->bdaddr, HCI_ROLE_SLAVE);
-			if (!conn) {
-				bt_dev_err(hdev, "no memory for new conn");
+			if (IS_ERR(conn)) {
+				bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
 				goto unlock;
 			}
 		} else {
@@ -3343,8 +3349,8 @@ static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
 	if (!conn) {
 		conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
 					  HCI_ROLE_SLAVE);
-		if (!conn) {
-			bt_dev_err(hdev, "no memory for new connection");
+		if (IS_ERR(conn)) {
+			bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
 			goto unlock;
 		}
 	}
@@ -3821,6 +3827,9 @@ static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
 	BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
 	       hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
 
+	if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
+		return HCI_ERROR_INVALID_PARAMETERS;
+
 	return rp->status;
 }
 
@@ -5912,8 +5921,8 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 			goto unlock;
 
 		conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
-		if (!conn) {
-			bt_dev_err(hdev, "no memory for new connection");
+		if (IS_ERR(conn)) {
+			bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
 			goto unlock;
 		}
 
@@ -7042,7 +7051,7 @@ static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
 	if (!cis) {
 		cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
 				   cis_handle);
-		if (!cis) {
+		if (IS_ERR(cis)) {
 			hci_le_reject_cis(hdev, ev->cis_handle);
 			goto unlock;
 		}
@@ -7151,7 +7160,7 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 		if (!bis) {
 			bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
 					   HCI_ROLE_SLAVE, handle);
-			if (!bis)
+			if (IS_ERR(bis))
 				continue;
 		}
 
@@ -7181,6 +7190,8 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 			u16 handle = le16_to_cpu(ev->bis[i]);
 
 			bis = hci_conn_hash_lookup_handle(hdev, handle);
+			if (!bis)
+				continue;
 
 			set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
 			hci_connect_cfm(bis, ev->status);
@@ -7221,7 +7232,7 @@ static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
 	pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
 				     HCI_ROLE_SLAVE);
 
-	if (!pa_sync)
+	if (IS_ERR(pa_sync))
 		goto unlock;
 
 	pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index fa6c2e95d5..6d217df75c 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -1264,7 +1264,7 @@ static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 		return -ENOTCONN;
 	}
 
-	mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu;
+	mtu = iso_pi(sk)->conn->hcon->mtu;
 
 	release_sock(sk);
 
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 84fc70862d..3f7a82f10f 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -415,6 +415,9 @@ static void l2cap_chan_timeout(struct work_struct *work)
 
 	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
 
+	if (!conn)
+		return;
+
 	mutex_lock(&conn->chan_lock);
 	/* __set_chan_timer() calls l2cap_chan_hold(chan) while scheduling
 	 * this work. No need to call l2cap_chan_hold(chan) here again.
@@ -3902,13 +3905,12 @@ static inline int l2cap_command_rej(struct l2cap_conn *conn,
 	return 0;
 }
 
-static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
-					struct l2cap_cmd_hdr *cmd,
-					u8 *data, u8 rsp_code, u8 amp_id)
+static void l2cap_connect(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd,
+			  u8 *data, u8 rsp_code, u8 amp_id)
 {
 	struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
 	struct l2cap_conn_rsp rsp;
-	struct l2cap_chan *chan = NULL, *pchan;
+	struct l2cap_chan *chan = NULL, *pchan = NULL;
 	int result, status = L2CAP_CS_NO_INFO;
 
 	u16 dcid = 0, scid = __le16_to_cpu(req->scid);
@@ -3921,7 +3923,7 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
 					 &conn->hcon->dst, ACL_LINK);
 	if (!pchan) {
 		result = L2CAP_CR_BAD_PSM;
-		goto sendresp;
+		goto response;
 	}
 
 	mutex_lock(&conn->chan_lock);
@@ -4008,17 +4010,15 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
 	}
 
 response:
-	l2cap_chan_unlock(pchan);
-	mutex_unlock(&conn->chan_lock);
-	l2cap_chan_put(pchan);
-
-sendresp:
 	rsp.scid   = cpu_to_le16(scid);
 	rsp.dcid   = cpu_to_le16(dcid);
 	rsp.result = cpu_to_le16(result);
 	rsp.status = cpu_to_le16(status);
 	l2cap_send_cmd(conn, cmd->ident, rsp_code, sizeof(rsp), &rsp);
 
+	if (!pchan)
+		return;
+
 	if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) {
 		struct l2cap_info_req info;
 		info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
@@ -4041,7 +4041,9 @@ sendresp:
 		chan->num_conf_req++;
 	}
 
-	return chan;
+	l2cap_chan_unlock(pchan);
+	mutex_unlock(&conn->chan_lock);
+	l2cap_chan_put(pchan);
 }
 
 static int l2cap_connect_req(struct l2cap_conn *conn,
@@ -6239,7 +6241,7 @@ static int l2cap_finish_move(struct l2cap_chan *chan)
 	BT_DBG("chan %p", chan);
 
 	chan->rx_state = L2CAP_RX_STATE_RECV;
-	chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;
+	chan->conn->mtu = chan->conn->hcon->mtu;
 
 	return l2cap_resegment(chan);
 }
@@ -6306,7 +6308,7 @@ static int l2cap_rx_state_wait_f(struct l2cap_chan *chan,
 	 */
 	chan->next_tx_seq = control->reqseq;
 	chan->unacked_frames = 0;
-	chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;
+	chan->conn->mtu = chan->conn->hcon->mtu;
 
 	err = l2cap_resegment(chan);
 
@@ -6846,18 +6848,7 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon)
 
 	BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan);
 
-	switch (hcon->type) {
-	case LE_LINK:
-		if (hcon->hdev->le_mtu) {
-			conn->mtu = hcon->hdev->le_mtu;
-			break;
-		}
-		fallthrough;
-	default:
-		conn->mtu = hcon->hdev->acl_mtu;
-		break;
-	}
-
+	conn->mtu = hcon->mtu;
 	conn->feat_mask = 0;
 
 	conn->local_fixed_chan = L2CAP_FC_SIG_BREDR | L2CAP_FC_CONNLESS;
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index 9612c5d1b1..d039683d3b 100644
--- a/net/bluetooth/msft.c
+++ b/net/bluetooth/msft.c
@@ -769,7 +769,7 @@ void msft_register(struct hci_dev *hdev)
 	mutex_init(&msft->filter_lock);
 }
 
-void msft_unregister(struct hci_dev *hdev)
+void msft_release(struct hci_dev *hdev)
 {
 	struct msft_data *msft = hdev->msft_data;
 
diff --git a/net/bluetooth/msft.h b/net/bluetooth/msft.h
index 2a63205b37..fe538e9c91 100644
--- a/net/bluetooth/msft.h
+++ b/net/bluetooth/msft.h
@@ -14,7 +14,7 @@
 
 bool msft_monitor_supported(struct hci_dev *hdev);
 void msft_register(struct hci_dev *hdev);
-void msft_unregister(struct hci_dev *hdev);
+void msft_release(struct hci_dev *hdev);
 void msft_do_open(struct hci_dev *hdev);
 void msft_do_close(struct hci_dev *hdev);
 void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb);
@@ -35,7 +35,7 @@ static inline bool msft_monitor_supported(struct hci_dev *hdev)
 }
 
 static inline void msft_register(struct hci_dev *hdev) {}
-static inline void msft_unregister(struct hci_dev *hdev) {}
+static inline void msft_release(struct hci_dev *hdev) {}
 static inline void msft_do_open(struct hci_dev *hdev) {}
 static inline void msft_do_close(struct hci_dev *hdev) {}
 static inline void msft_vendor_evt(struct hci_dev *hdev, void *data,
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 5d03c5440b..71d36582d4 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -83,6 +83,10 @@ static void sco_sock_timeout(struct work_struct *work)
 	struct sock *sk;
 
 	sco_conn_lock(conn);
+	if (!conn->hcon) {
+		sco_conn_unlock(conn);
+		return;
+	}
 	sk = conn->sk;
 	if (sk)
 		sock_hold(sk);
@@ -122,7 +126,6 @@ static void sco_sock_clear_timer(struct sock *sk)
 /* ---- SCO connections ---- */
 static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
 {
-	struct hci_dev *hdev = hcon->hdev;
 	struct sco_conn *conn = hcon->sco_data;
 
 	if (conn) {
@@ -140,9 +143,10 @@ static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
 
 	hcon->sco_data = conn;
 	conn->hcon = hcon;
+	conn->mtu = hcon->mtu;
 
-	if (hdev->sco_mtu > 0)
-		conn->mtu = hdev->sco_mtu;
+	if (hcon->mtu > 0)
+		conn->mtu = hcon->mtu;
 	else
 		conn->mtu = 60;
 
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 7431f89e89..d97064d460 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -258,6 +258,7 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
 {
 	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
 	const unsigned char *src = eth_hdr(skb)->h_source;
+	struct sk_buff *nskb;
 
 	if (!should_deliver(p, skb))
 		return;
@@ -266,12 +267,16 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
 	if (skb->dev == p->dev && ether_addr_equal(src, addr))
 		return;
 
-	skb = skb_copy(skb, GFP_ATOMIC);
-	if (!skb) {
+	__skb_push(skb, ETH_HLEN);
+	nskb = pskb_copy(skb, GFP_ATOMIC);
+	__skb_pull(skb, ETH_HLEN);
+	if (!nskb) {
 		DEV_STATS_INC(dev, tx_dropped);
 		return;
 	}
 
+	skb = nskb;
+	__skb_pull(skb, ETH_HLEN);
 	if (!is_broadcast_ether_addr(addr))
 		memcpy(eth_hdr(skb)->h_dest, addr, ETH_ALEN);
 
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index d415833fce..f17dbac7d8 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -455,7 +455,8 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 			  u32 filter_mask, const struct net_device *dev,
 			  bool getlink)
 {
-	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+	u8 operstate = netif_running(dev) ? READ_ONCE(dev->operstate) :
+					    IF_OPER_DOWN;
 	struct nlattr *af = NULL;
 	struct net_bridge *br;
 	struct ifinfomsg *hdr;
diff --git a/net/core/filter.c b/net/core/filter.c
index ef3e78b6a3..75cdaa1604 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4360,10 +4360,12 @@ static __always_inline int __xdp_do_redirect_frame(struct bpf_redirect_info *ri,
 	enum bpf_map_type map_type = ri->map_type;
 	void *fwd = ri->tgt_value;
 	u32 map_id = ri->map_id;
+	u32 flags = ri->flags;
 	struct bpf_map *map;
 	int err;
 
 	ri->map_id = 0; /* Valid map id idr range: [1,INT_MAX[ */
+	ri->flags = 0;
 	ri->map_type = BPF_MAP_TYPE_UNSPEC;
 
 	if (unlikely(!xdpf)) {
@@ -4375,11 +4377,20 @@ static __always_inline int __xdp_do_redirect_frame(struct bpf_redirect_info *ri,
 	case BPF_MAP_TYPE_DEVMAP:
 		fallthrough;
 	case BPF_MAP_TYPE_DEVMAP_HASH:
-		map = READ_ONCE(ri->map);
-		if (unlikely(map)) {
+		if (unlikely(flags & BPF_F_BROADCAST)) {
+			map = READ_ONCE(ri->map);
+
+			/* The map pointer is cleared when the map is being torn
+			 * down by bpf_clear_redirect_map()
+			 */
+			if (unlikely(!map)) {
+				err = -ENOENT;
+				break;
+			}
+
 			WRITE_ONCE(ri->map, NULL);
 			err = dev_map_enqueue_multi(xdpf, dev, map,
-						    ri->flags & BPF_F_EXCLUDE_INGRESS);
+						    flags & BPF_F_EXCLUDE_INGRESS);
 		} else {
 			err = dev_map_enqueue(fwd, xdpf, dev);
 		}
@@ -4442,9 +4453,9 @@ EXPORT_SYMBOL_GPL(xdp_do_redirect_frame);
 static int xdp_do_generic_redirect_map(struct net_device *dev,
 				       struct sk_buff *skb,
 				       struct xdp_buff *xdp,
-				       struct bpf_prog *xdp_prog,
-				       void *fwd,
-				       enum bpf_map_type map_type, u32 map_id)
+				       struct bpf_prog *xdp_prog, void *fwd,
+				       enum bpf_map_type map_type, u32 map_id,
+				       u32 flags)
 {
 	struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
 	struct bpf_map *map;
@@ -4454,11 +4465,20 @@ static int xdp_do_generic_redirect_map(struct net_device *dev,
 	case BPF_MAP_TYPE_DEVMAP:
 		fallthrough;
 	case BPF_MAP_TYPE_DEVMAP_HASH:
-		map = READ_ONCE(ri->map);
-		if (unlikely(map)) {
+		if (unlikely(flags & BPF_F_BROADCAST)) {
+			map = READ_ONCE(ri->map);
+
+			/* The map pointer is cleared when the map is being torn
+			 * down by bpf_clear_redirect_map()
+			 */
+			if (unlikely(!map)) {
+				err = -ENOENT;
+				break;
+			}
+
 			WRITE_ONCE(ri->map, NULL);
 			err = dev_map_redirect_multi(dev, skb, xdp_prog, map,
-						     ri->flags & BPF_F_EXCLUDE_INGRESS);
+						     flags & BPF_F_EXCLUDE_INGRESS);
 		} else {
 			err = dev_map_generic_redirect(fwd, skb, xdp_prog);
 		}
@@ -4495,9 +4515,11 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb,
 	enum bpf_map_type map_type = ri->map_type;
 	void *fwd = ri->tgt_value;
 	u32 map_id = ri->map_id;
+	u32 flags = ri->flags;
 	int err;
 
 	ri->map_id = 0; /* Valid map id idr range: [1,INT_MAX[ */
+	ri->flags = 0;
 	ri->map_type = BPF_MAP_TYPE_UNSPEC;
 
 	if (map_type == BPF_MAP_TYPE_UNSPEC && map_id == INT_MAX) {
@@ -4517,7 +4539,7 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb,
 		return 0;
 	}
 
-	return xdp_do_generic_redirect_map(dev, skb, xdp, xdp_prog, fwd, map_type, map_id);
+	return xdp_do_generic_redirect_map(dev, skb, xdp, xdp_prog, fwd, map_type, map_id, flags);
 err:
 	_trace_xdp_redirect_err(dev, xdp_prog, ri->tgt_index, err);
 	return err;
diff --git a/net/core/gro.c b/net/core/gro.c
index cefddf65f7..31e40f25fd 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -373,6 +373,7 @@ static inline void skb_gro_reset_offset(struct sk_buff *skb, u32 nhoff)
 	const struct skb_shared_info *pinfo = skb_shinfo(skb);
 	const skb_frag_t *frag0 = &pinfo->frags[0];
 
+	NAPI_GRO_CB(skb)->network_offset = 0;
 	NAPI_GRO_CB(skb)->data_offset = 0;
 	NAPI_GRO_CB(skb)->frag0 = NULL;
 	NAPI_GRO_CB(skb)->frag0_len = 0;
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
index 429571c258..1b93e054c9 100644
--- a/net/core/link_watch.c
+++ b/net/core/link_watch.c
@@ -67,7 +67,7 @@ static void rfc2863_policy(struct net_device *dev)
 {
 	unsigned char operstate = default_operstate(dev);
 
-	if (operstate == dev->operstate)
+	if (operstate == READ_ONCE(dev->operstate))
 		return;
 
 	write_lock(&dev_base_lock);
@@ -87,7 +87,7 @@ static void rfc2863_policy(struct net_device *dev)
 		break;
 	}
 
-	dev->operstate = operstate;
+	WRITE_ONCE(dev->operstate, operstate);
 
 	write_unlock(&dev_base_lock);
 }
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index a09d507c5b..676048ae11 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -318,11 +318,9 @@ static ssize_t operstate_show(struct device *dev,
 	const struct net_device *netdev = to_net_dev(dev);
 	unsigned char operstate;
 
-	read_lock(&dev_base_lock);
-	operstate = netdev->operstate;
+	operstate = READ_ONCE(netdev->operstate);
 	if (!netif_running(netdev))
 		operstate = IF_OPER_DOWN;
-	read_unlock(&dev_base_lock);
 
 	if (operstate >= ARRAY_SIZE(operstates))
 		return -EINVAL; /* should not happen */
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 7279953342..b36444e381 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -69,12 +69,15 @@ DEFINE_COOKIE(net_cookie);
 
 static struct net_generic *net_alloc_generic(void)
 {
+	unsigned int gen_ptrs = READ_ONCE(max_gen_ptrs);
+	unsigned int generic_size;
 	struct net_generic *ng;
-	unsigned int generic_size = offsetof(struct net_generic, ptr[max_gen_ptrs]);
+
+	generic_size = offsetof(struct net_generic, ptr[gen_ptrs]);
 
 	ng = kzalloc(generic_size, GFP_KERNEL);
 	if (ng)
-		ng->s.len = max_gen_ptrs;
+		ng->s.len = gen_ptrs;
 
 	return ng;
 }
@@ -1278,7 +1281,11 @@ static int register_pernet_operations(struct list_head *list,
 		if (error < 0)
 			return error;
 		*ops->id = error;
-		max_gen_ptrs = max(max_gen_ptrs, *ops->id + 1);
+		/* This does not require READ_ONCE as writers already hold
+		 * pernet_ops_rwsem. But WRITE_ONCE is needed to protect
+		 * net_alloc_generic.
+		 */
+		WRITE_ONCE(max_gen_ptrs, max(max_gen_ptrs, *ops->id + 1));
 	}
 	error = __register_pernet_operations(list, ops);
 	if (error) {
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index bd50e9fe32..95e62235b5 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -875,9 +875,9 @@ static void set_operstate(struct net_device *dev, unsigned char transition)
 		break;
 	}
 
-	if (dev->operstate != operstate) {
+	if (READ_ONCE(dev->operstate) != operstate) {
 		write_lock(&dev_base_lock);
-		dev->operstate = operstate;
+		WRITE_ONCE(dev->operstate, operstate);
 		write_unlock(&dev_base_lock);
 		netdev_state_change(dev);
 	}
@@ -2552,7 +2552,7 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
 
 		nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
 			if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
-			    nla_len(attr) < NLA_HDRLEN) {
+			    nla_len(attr) < sizeof(struct ifla_vf_vlan_info)) {
 				return -EINVAL;
 			}
 			if (len >= MAX_VLAN_LIST_LEN)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 71dee435d5..570269c477 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2014,11 +2014,17 @@ static inline int skb_alloc_rx_flag(const struct sk_buff *skb)
 
 struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t gfp_mask)
 {
-	int headerlen = skb_headroom(skb);
-	unsigned int size = skb_end_offset(skb) + skb->data_len;
-	struct sk_buff *n = __alloc_skb(size, gfp_mask,
-					skb_alloc_rx_flag(skb), NUMA_NO_NODE);
+	struct sk_buff *n;
+	unsigned int size;
+	int headerlen;
+
+	if (WARN_ON_ONCE(skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST))
+		return NULL;
 
+	headerlen = skb_headroom(skb);
+	size = skb_end_offset(skb) + skb->data_len;
+	n = __alloc_skb(size, gfp_mask,
+			skb_alloc_rx_flag(skb), NUMA_NO_NODE);
 	if (!n)
 		return NULL;
 
@@ -2346,12 +2352,17 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
 	/*
 	 *	Allocate the copy buffer
 	 */
-	struct sk_buff *n = __alloc_skb(newheadroom + skb->len + newtailroom,
-					gfp_mask, skb_alloc_rx_flag(skb),
-					NUMA_NO_NODE);
-	int oldheadroom = skb_headroom(skb);
 	int head_copy_len, head_copy_off;
+	struct sk_buff *n;
+	int oldheadroom;
+
+	if (WARN_ON_ONCE(skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST))
+		return NULL;
 
+	oldheadroom = skb_headroom(skb);
+	n = __alloc_skb(newheadroom + skb->len + newtailroom,
+			gfp_mask, skb_alloc_rx_flag(skb),
+			NUMA_NO_NODE);
 	if (!n)
 		return NULL;
 
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 4d75ef9d24..fd20aae30b 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -1226,11 +1226,8 @@ static void sk_psock_verdict_data_ready(struct sock *sk)
 
 		rcu_read_lock();
 		psock = sk_psock(sk);
-		if (psock) {
-			read_lock_bh(&sk->sk_callback_lock);
+		if (psock)
 			sk_psock_data_ready(sk, psock);
-			read_unlock_bh(&sk->sk_callback_lock);
-		}
 		rcu_read_unlock();
 	}
 }
diff --git a/net/core/sock.c b/net/core/sock.c
index 9cf404e803..599f186fe3 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -482,7 +482,7 @@ int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 	unsigned long flags;
 	struct sk_buff_head *list = &sk->sk_receive_queue;
 
-	if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) {
+	if (atomic_read(&sk->sk_rmem_alloc) >= READ_ONCE(sk->sk_rcvbuf)) {
 		atomic_inc(&sk->sk_drops);
 		trace_sock_rcvqueue_full(sk, skb);
 		return -ENOMEM;
@@ -552,7 +552,7 @@ int __sk_receive_skb(struct sock *sk, struct sk_buff *skb,
 
 	skb->dev = NULL;
 
-	if (sk_rcvqueues_full(sk, sk->sk_rcvbuf)) {
+	if (sk_rcvqueues_full(sk, READ_ONCE(sk->sk_rcvbuf))) {
 		atomic_inc(&sk->sk_drops);
 		goto discard_and_relse;
 	}
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index 9d71b66183..03a42de751 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -31,8 +31,8 @@ static bool is_slave_up(struct net_device *dev)
 static void __hsr_set_operstate(struct net_device *dev, int transition)
 {
 	write_lock(&dev_base_lock);
-	if (dev->operstate != transition) {
-		dev->operstate = transition;
+	if (READ_ONCE(dev->operstate) != transition) {
+		WRITE_ONCE(dev->operstate, transition);
 		write_unlock(&dev_base_lock);
 		netdev_state_change(dev);
 	} else {
@@ -71,39 +71,36 @@ static bool hsr_check_carrier(struct hsr_port *master)
 	return false;
 }
 
-static void hsr_check_announce(struct net_device *hsr_dev,
-			       unsigned char old_operstate)
+static void hsr_check_announce(struct net_device *hsr_dev)
 {
 	struct hsr_priv *hsr;
 
 	hsr = netdev_priv(hsr_dev);
-
-	if (hsr_dev->operstate == IF_OPER_UP && old_operstate != IF_OPER_UP) {
-		/* Went up */
-		hsr->announce_count = 0;
-		mod_timer(&hsr->announce_timer,
-			  jiffies + msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL));
+	if (netif_running(hsr_dev) && netif_oper_up(hsr_dev)) {
+		/* Enable announce timer and start sending supervisory frames */
+		if (!timer_pending(&hsr->announce_timer)) {
+			hsr->announce_count = 0;
+			mod_timer(&hsr->announce_timer, jiffies +
+				  msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL));
+		}
+	} else {
+		/* Deactivate the announce timer  */
+		timer_delete(&hsr->announce_timer);
 	}
-
-	if (hsr_dev->operstate != IF_OPER_UP && old_operstate == IF_OPER_UP)
-		/* Went down */
-		del_timer(&hsr->announce_timer);
 }
 
 void hsr_check_carrier_and_operstate(struct hsr_priv *hsr)
 {
 	struct hsr_port *master;
-	unsigned char old_operstate;
 	bool has_carrier;
 
 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
 	/* netif_stacked_transfer_operstate() cannot be used here since
 	 * it doesn't set IF_OPER_LOWERLAYERDOWN (?)
 	 */
-	old_operstate = master->dev->operstate;
 	has_carrier = hsr_check_carrier(master);
 	hsr_set_operstate(master, has_carrier);
-	hsr_check_announce(master->dev, old_operstate);
+	hsr_check_announce(master->dev);
 }
 
 int hsr_get_max_mtu(struct hsr_priv *hsr)
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index a5a820ee20..ce5c26cf1e 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1571,6 +1571,7 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
 	/* The above will be needed by the transport layer if there is one
 	 * immediately following this IP hdr.
 	 */
+	NAPI_GRO_CB(skb)->inner_network_offset = off;
 
 	/* Note : No need to call skb_gro_postpull_rcsum() here,
 	 * as we already checked checksum over ipv4 header was 0
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 67d8466223..a38e63669c 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1473,7 +1473,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
 		 * by icmp_hdr(skb)->type.
 		 */
 		if (sk->sk_type == SOCK_RAW &&
-		    !inet_test_bit(HDRINCL, sk))
+		    !(fl4->flowi4_flags & FLOWI_FLAG_KNOWN_NH))
 			icmp_type = fl4->fl4_icmp_type;
 		else
 			icmp_type = icmp_hdr(skb)->type;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 288f1846b3..a1d8218fa1 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -605,6 +605,9 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 			    (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
 			   daddr, saddr, 0, 0, sk->sk_uid);
 
+	fl4.fl4_icmp_type = 0;
+	fl4.fl4_icmp_code = 0;
+
 	if (!hdrincl) {
 		rfv.msg = msg;
 		rfv.hlen = 0;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 5887eac87b..94b129301d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2709,7 +2709,7 @@ void tcp_shutdown(struct sock *sk, int how)
 	/* If we've already sent a FIN, or it's a closed state, skip this. */
 	if ((1 << sk->sk_state) &
 	    (TCPF_ESTABLISHED | TCPF_SYN_SENT |
-	     TCPF_SYN_RECV | TCPF_CLOSE_WAIT)) {
+	     TCPF_CLOSE_WAIT)) {
 		/* Clear out any half completed packets.  FIN if needed. */
 		if (tcp_close_state(sk))
 			tcp_send_fin(sk);
@@ -2818,7 +2818,7 @@ void __tcp_close(struct sock *sk, long timeout)
 		 * machine. State transitions:
 		 *
 		 * TCP_ESTABLISHED -> TCP_FIN_WAIT1
-		 * TCP_SYN_RECV	-> TCP_FIN_WAIT1 (forget it, it's impossible)
+		 * TCP_SYN_RECV	-> TCP_FIN_WAIT1 (it is difficult)
 		 * TCP_CLOSE_WAIT -> TCP_LAST_ACK
 		 *
 		 * are legal only when FIN has been sent (i.e. in window),
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index df7b13f0e5..ff10be8c76 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -6752,6 +6752,8 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb)
 
 		tcp_initialize_rcv_mss(sk);
 		tcp_fast_path_on(tp);
+		if (sk->sk_shutdown & SEND_SHUTDOWN)
+			tcp_shutdown(sk, SEND_SHUTDOWN);
 		break;
 
 	case TCP_FIN_WAIT1: {
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 0c50c5a32b..68a065c0e5 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -154,6 +154,12 @@ int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
 	if (tcptw->tw_ts_recent_stamp &&
 	    (!twp || (reuse && time_after32(ktime_get_seconds(),
 					    tcptw->tw_ts_recent_stamp)))) {
+		/* inet_twsk_hashdance() sets sk_refcnt after putting twsk
+		 * and releasing the bucket lock.
+		 */
+		if (unlikely(!refcount_inc_not_zero(&sktw->sk_refcnt)))
+			return 0;
+
 		/* In case of repair and re-using TIME-WAIT sockets we still
 		 * want to be sure that it is safe as above but honor the
 		 * sequence numbers and time stamps set as part of the repair
@@ -174,7 +180,7 @@ int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
 			tp->rx_opt.ts_recent	   = tcptw->tw_ts_recent;
 			tp->rx_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
 		}
-		sock_hold(sktw);
+
 		return 1;
 	}
 
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index e3167ad965..02caeb7bcf 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3563,7 +3563,9 @@ void tcp_send_fin(struct sock *sk)
 			return;
 		}
 	} else {
-		skb = alloc_skb_fclone(MAX_TCP_HEADER, sk->sk_allocation);
+		skb = alloc_skb_fclone(MAX_TCP_HEADER,
+				       sk_gfp_mask(sk, GFP_ATOMIC |
+						       __GFP_NOWARN));
 		if (unlikely(!skb))
 			return;
 
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 40282a3418..9120694359 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -534,7 +534,8 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
 struct sock *udp4_lib_lookup_skb(const struct sk_buff *skb,
 				 __be16 sport, __be16 dport)
 {
-	const struct iphdr *iph = ip_hdr(skb);
+	const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];
+	const struct iphdr *iph = (struct iphdr *)(skb->data + offset);
 	struct net *net = dev_net(skb->dev);
 	int iif, sdif;
 
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index c3d67423ae..e5971890d6 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -471,6 +471,7 @@ static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
 	struct sk_buff *p;
 	unsigned int ulen;
 	int ret = 0;
+	int flush;
 
 	/* requires non zero csum, for symmetry with GSO */
 	if (!uh->check) {
@@ -504,13 +505,22 @@ static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
 			return p;
 		}
 
+		flush = NAPI_GRO_CB(p)->flush;
+
+		if (NAPI_GRO_CB(p)->flush_id != 1 ||
+		    NAPI_GRO_CB(p)->count != 1 ||
+		    !NAPI_GRO_CB(p)->is_atomic)
+			flush |= NAPI_GRO_CB(p)->flush_id;
+		else
+			NAPI_GRO_CB(p)->is_atomic = false;
+
 		/* Terminate the flow on len mismatch or if it grow "too much".
 		 * Under small packet flood GRO count could elsewhere grow a lot
 		 * leading to excessive truesize values.
 		 * On len mismatch merge the first packet shorter than gso_size,
 		 * otherwise complete the GRO packet.
 		 */
-		if (ulen > ntohs(uh2->len)) {
+		if (ulen > ntohs(uh2->len) || flush) {
 			pp = p;
 		} else {
 			if (NAPI_GRO_CB(skb)->is_flist) {
@@ -718,7 +728,8 @@ EXPORT_SYMBOL(udp_gro_complete);
 
 INDIRECT_CALLABLE_SCOPE int udp4_gro_complete(struct sk_buff *skb, int nhoff)
 {
-	const struct iphdr *iph = ip_hdr(skb);
+	const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];
+	const struct iphdr *iph = (struct iphdr *)(skb->data + offset);
 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);
 
 	/* do fraglist only if there is no outer UDP encap (or we already processed it) */
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index c54676998e..801404f7d6 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -63,7 +63,11 @@ int xfrm4_transport_finish(struct sk_buff *skb, int async)
 	ip_send_check(iph);
 
 	if (xo && (xo->flags & XFRM_GRO)) {
-		skb_mac_header_rebuild(skb);
+		/* The full l2 header needs to be preserved so that re-injecting the packet at l2
+		 * works correctly in the presence of vlan tags.
+		 */
+		skb_mac_header_rebuild_full(skb, xo->orig_mac_len);
+		skb_reset_network_header(skb);
 		skb_reset_transport_header(skb);
 		return 0;
 	}
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 37d48aa073..c4e2f9d35e 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4164,7 +4164,7 @@ static void addrconf_dad_work(struct work_struct *w)
 			if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
 			    ipv6_addr_equal(&ifp->addr, &addr)) {
 				/* DAD failed for link-local based on MAC */
-				idev->cnf.disable_ipv6 = 1;
+				WRITE_ONCE(idev->cnf.disable_ipv6, 1);
 
 				pr_info("%s: IPv6 being disabled!\n",
 					ifp->idev->dev->name);
@@ -6015,7 +6015,7 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
 	    (dev->ifindex != dev_get_iflink(dev) &&
 	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
 	    nla_put_u8(skb, IFLA_OPERSTATE,
-		       netif_running(dev) ? dev->operstate : IF_OPER_DOWN))
+		       netif_running(dev) ? READ_ONCE(dev->operstate) : IF_OPER_DOWN))
 		goto nla_put_failure;
 	protoinfo = nla_nest_start_noflag(skb, IFLA_PROTINFO);
 	if (!protoinfo)
@@ -6325,7 +6325,8 @@ static void addrconf_disable_change(struct net *net, __s32 newf)
 		idev = __in6_dev_get(dev);
 		if (idev) {
 			int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
-			idev->cnf.disable_ipv6 = newf;
+
+			WRITE_ONCE(idev->cnf.disable_ipv6, newf);
 			if (changed)
 				dev_disable_change(idev);
 		}
@@ -6342,7 +6343,7 @@ static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
 
 	net = (struct net *)table->extra2;
 	old = *p;
-	*p = newf;
+	WRITE_ONCE(*p, newf);
 
 	if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
 		rtnl_unlock();
@@ -6350,7 +6351,7 @@ static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
 	}
 
 	if (p == &net->ipv6.devconf_all->disable_ipv6) {
-		net->ipv6.devconf_dflt->disable_ipv6 = newf;
+		WRITE_ONCE(net->ipv6.devconf_dflt->disable_ipv6, newf);
 		addrconf_disable_change(net, newf);
 	} else if ((!newf) ^ (!old))
 		dev_disable_change((struct inet6_dev *)table->extra1);
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 52c04f0ac4..9e254de746 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -233,8 +233,12 @@ static int __fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
 	rt = pol_lookup_func(lookup,
 			     net, table, flp6, arg->lookup_data, flags);
 	if (rt != net->ipv6.ip6_null_entry) {
+		struct inet6_dev *idev = ip6_dst_idev(&rt->dst);
+
+		if (!idev)
+			goto again;
 		err = fib6_rule_saddr(net, rule, flags, flp6,
-				      ip6_dst_idev(&rt->dst)->dev);
+				      idev->dev);
 
 		if (err == -EAGAIN)
 			goto again;
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index b837881453..1ba97933c7 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -168,9 +168,9 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev,
 
 	SKB_DR_SET(reason, NOT_SPECIFIED);
 	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL ||
-	    !idev || unlikely(idev->cnf.disable_ipv6)) {
+	    !idev || unlikely(READ_ONCE(idev->cnf.disable_ipv6))) {
 		__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
-		if (idev && unlikely(idev->cnf.disable_ipv6))
+		if (idev && unlikely(READ_ONCE(idev->cnf.disable_ipv6)))
 			SKB_DR_SET(reason, IPV6DISABLED);
 		goto drop;
 	}
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index cca64c7809..19ae2d4cd2 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -237,6 +237,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
 		goto out;
 
 	skb_set_network_header(skb, off);
+	NAPI_GRO_CB(skb)->inner_network_offset = off;
 
 	flush += ntohs(iph->payload_len) != skb->len - hlen;
 
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 31b86fe661..51b358f6c3 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -234,7 +234,7 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 	skb->protocol = htons(ETH_P_IPV6);
 	skb->dev = dev;
 
-	if (unlikely(idev->cnf.disable_ipv6)) {
+	if (unlikely(!idev || READ_ONCE(idev->cnf.disable_ipv6))) {
 		IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
 		kfree_skb_reason(skb, SKB_DROP_REASON_IPV6DISABLED);
 		return 0;
@@ -1933,7 +1933,7 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 		u8 icmp6_type;
 
 		if (sk->sk_socket->type == SOCK_RAW &&
-		   !inet_test_bit(HDRINCL, sk))
+		   !(fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH))
 			icmp6_type = fl6->fl6_icmp_type;
 		else
 			icmp6_type = icmp6_hdr(skb)->icmp6_type;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 8c14c4cc82..785b2d076a 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -275,7 +275,8 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
 struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb,
 				 __be16 sport, __be16 dport)
 {
-	const struct ipv6hdr *iph = ipv6_hdr(skb);
+	const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];
+	const struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + offset);
 	struct net *net = dev_net(skb->dev);
 	int iif, sdif;
 
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index 626d7b362d..639a4b506f 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -164,7 +164,8 @@ flush:
 
 INDIRECT_CALLABLE_SCOPE int udp6_gro_complete(struct sk_buff *skb, int nhoff)
 {
-	const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+	const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];
+	const struct ipv6hdr *ipv6h = (struct ipv6hdr *)(skb->data + offset);
 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);
 
 	/* do fraglist only if there is no outer UDP encap (or we already processed it) */
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index 6e36e5047f..4e6dcefd63 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -58,7 +58,11 @@ int xfrm6_transport_finish(struct sk_buff *skb, int async)
 	skb_postpush_rcsum(skb, skb_network_header(skb), nhlen);
 
 	if (xo && (xo->flags & XFRM_GRO)) {
-		skb_mac_header_rebuild(skb);
+		/* The full l2 header needs to be preserved so that re-injecting the packet at l2
+		 * works correctly in the presence of vlan tags.
+		 */
+		skb_mac_header_rebuild_full(skb, xo->orig_mac_len);
+		skb_reset_network_header(skb);
 		skb_reset_transport_header(skb);
 		return 0;
 	}
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index 25ca89f804..9dacfa91ac 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -127,6 +127,9 @@ static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb,
 	/* checksums verified by L2TP */
 	skb->ip_summed = CHECKSUM_NONE;
 
+	/* drop outer flow-hash */
+	skb_clear_hash(skb);
+
 	skb_dst_drop(skb);
 	nf_reset_ct(skb);
 
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index a18361afea..399fcb6665 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -131,7 +131,7 @@ struct ieee80211_bss {
 };
 
 /**
- * enum ieee80211_corrupt_data_flags - BSS data corruption flags
+ * enum ieee80211_bss_corrupt_data_flags - BSS data corruption flags
  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
  *
@@ -144,7 +144,7 @@ enum ieee80211_bss_corrupt_data_flags {
 };
 
 /**
- * enum ieee80211_valid_data_flags - BSS valid data flags
+ * enum ieee80211_bss_valid_data_flags - BSS valid data flags
  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 94028b541b..ac0073c8f9 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -7294,7 +7294,7 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
 			sdata_info(sdata,
 				   "failed to insert STA entry for the AP (error %d)\n",
 				   err);
-			goto out_err;
+			goto out_release_chan;
 		}
 	} else
 		WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
@@ -7305,8 +7305,9 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
 
 	return 0;
 
+out_release_chan:
+	ieee80211_link_release_channel(link);
 out_err:
-	ieee80211_link_release_channel(&sdata->deflink);
 	ieee80211_vif_set_links(sdata, 0, 0);
 	return err;
 }
diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c
index 13fe0748dd..2963ba84e2 100644
--- a/net/mptcp/ctrl.c
+++ b/net/mptcp/ctrl.c
@@ -96,6 +96,43 @@ static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
 }
 
 #ifdef CONFIG_SYSCTL
+static int mptcp_set_scheduler(const struct net *net, const char *name)
+{
+	struct mptcp_pernet *pernet = mptcp_get_pernet(net);
+	struct mptcp_sched_ops *sched;
+	int ret = 0;
+
+	rcu_read_lock();
+	sched = mptcp_sched_find(name);
+	if (sched)
+		strscpy(pernet->scheduler, name, MPTCP_SCHED_NAME_MAX);
+	else
+		ret = -ENOENT;
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static int proc_scheduler(struct ctl_table *ctl, int write,
+			  void *buffer, size_t *lenp, loff_t *ppos)
+{
+	const struct net *net = current->nsproxy->net_ns;
+	char val[MPTCP_SCHED_NAME_MAX];
+	struct ctl_table tbl = {
+		.data = val,
+		.maxlen = MPTCP_SCHED_NAME_MAX,
+	};
+	int ret;
+
+	strscpy(val, mptcp_get_scheduler(net), MPTCP_SCHED_NAME_MAX);
+
+	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
+	if (write && ret == 0)
+		ret = mptcp_set_scheduler(net, val);
+
+	return ret;
+}
+
 static struct ctl_table mptcp_sysctl_table[] = {
 	{
 		.procname = "enabled",
@@ -148,7 +185,7 @@ static struct ctl_table mptcp_sysctl_table[] = {
 		.procname = "scheduler",
 		.maxlen	= MPTCP_SCHED_NAME_MAX,
 		.mode = 0644,
-		.proc_handler = proc_dostring,
+		.proc_handler = proc_scheduler,
 	},
 	{
 		.procname = "close_timeout",
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 2b921af271..74c1faec27 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3703,6 +3703,9 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_TOKENFALLBACKINIT);
 		mptcp_subflow_early_fallback(msk, subflow);
 	}
+
+	WRITE_ONCE(msk->write_seq, subflow->idsn);
+	WRITE_ONCE(msk->snd_nxt, subflow->idsn);
 	if (likely(!__mptcp_check_fallback(msk)))
 		MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPCAPABLEACTIVE);
 
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 819157bbb5..d5344563e5 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -252,10 +252,10 @@ static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
 			break;
 		}
 
-		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
-			err = -EFAULT;
+		err = copy_safe_from_sockptr(&opt, sizeof(opt),
+					     optval, optlen);
+		if (err)
 			break;
-		}
 
 		if (opt > LLCP_MAX_RW) {
 			err = -EINVAL;
@@ -274,10 +274,10 @@ static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
 			break;
 		}
 
-		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
-			err = -EFAULT;
+		err = copy_safe_from_sockptr(&opt, sizeof(opt),
+					     optval, optlen);
+		if (err)
 			break;
-		}
 
 		if (opt > LLCP_MAX_MIUX) {
 			err = -EINVAL;
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 0d26c8ec99..b133dc5530 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -1518,6 +1518,7 @@ static void nci_rx_work(struct work_struct *work)
 
 		if (!nci_plen(skb->data)) {
 			kfree_skb(skb);
+			kcov_remote_stop();
 			break;
 		}
 
diff --git a/net/nsh/nsh.c b/net/nsh/nsh.c
index f4a38bd6a7..bfb7758063 100644
--- a/net/nsh/nsh.c
+++ b/net/nsh/nsh.c
@@ -77,13 +77,15 @@ EXPORT_SYMBOL_GPL(nsh_pop);
 static struct sk_buff *nsh_gso_segment(struct sk_buff *skb,
 				       netdev_features_t features)
 {
+	unsigned int outer_hlen, mac_len, nsh_len;
 	struct sk_buff *segs = ERR_PTR(-EINVAL);
 	u16 mac_offset = skb->mac_header;
-	unsigned int nsh_len, mac_len;
-	__be16 proto;
+	__be16 outer_proto, proto;
 
 	skb_reset_network_header(skb);
 
+	outer_proto = skb->protocol;
+	outer_hlen = skb_mac_header_len(skb);
 	mac_len = skb->mac_len;
 
 	if (unlikely(!pskb_may_pull(skb, NSH_BASE_HDR_LEN)))
@@ -113,10 +115,10 @@ static struct sk_buff *nsh_gso_segment(struct sk_buff *skb,
 	}
 
 	for (skb = segs; skb; skb = skb->next) {
-		skb->protocol = htons(ETH_P_NSH);
-		__skb_push(skb, nsh_len);
-		skb->mac_header = mac_offset;
-		skb->network_header = skb->mac_header + mac_len;
+		skb->protocol = outer_proto;
+		__skb_push(skb, nsh_len + outer_hlen);
+		skb_reset_mac_header(skb);
+		skb_set_network_header(skb, outer_hlen);
 		skb->mac_len = mac_len;
 	}
 
diff --git a/net/phonet/pn_netlink.c b/net/phonet/pn_netlink.c
index 59aebe2968..dd4c7e9a63 100644
--- a/net/phonet/pn_netlink.c
+++ b/net/phonet/pn_netlink.c
@@ -193,7 +193,7 @@ void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
 	struct sk_buff *skb;
 	int err = -ENOBUFS;
 
-	skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
+	skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct rtmsg)) +
 			nla_total_size(1) + nla_total_size(4), GFP_KERNEL);
 	if (skb == NULL)
 		goto errout;
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 7818aae1be..4301dd20b4 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -692,7 +692,7 @@ struct rxrpc_call {
 	 * packets) rather than bytes.
 	 */
 #define RXRPC_TX_SMSS		RXRPC_JUMBO_DATALEN
-#define RXRPC_MIN_CWND		(RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4)
+#define RXRPC_MIN_CWND		4
 	u8			cong_cwnd;	/* Congestion window size */
 	u8			cong_extra;	/* Extra to send for congestion management */
 	u8			cong_ssthresh;	/* Slow-start threshold */
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 9fc9a6c3f6..3847b14af7 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -175,12 +175,7 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
 	call->rx_winsize = rxrpc_rx_window_size;
 	call->tx_winsize = 16;
 
-	if (RXRPC_TX_SMSS > 2190)
-		call->cong_cwnd = 2;
-	else if (RXRPC_TX_SMSS > 1095)
-		call->cong_cwnd = 3;
-	else
-		call->cong_cwnd = 4;
+	call->cong_cwnd = RXRPC_MIN_CWND;
 	call->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
 
 	call->rxnet = rxnet;
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 1f251d758c..598b4ee389 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -88,7 +88,7 @@ void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
 			struct rxrpc_ackpacket ack;
 		};
 	} __attribute__((packed)) pkt;
-	struct rxrpc_ackinfo ack_info;
+	struct rxrpc_acktrailer trailer;
 	size_t len;
 	int ret, ioc;
 	u32 serial, mtu, call_id, padding;
@@ -122,8 +122,8 @@ void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
 	iov[0].iov_len	= sizeof(pkt.whdr);
 	iov[1].iov_base	= &padding;
 	iov[1].iov_len	= 3;
-	iov[2].iov_base	= &ack_info;
-	iov[2].iov_len	= sizeof(ack_info);
+	iov[2].iov_base	= &trailer;
+	iov[2].iov_len	= sizeof(trailer);
 
 	serial = rxrpc_get_next_serial(conn);
 
@@ -158,14 +158,14 @@ void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
 		pkt.ack.serial		= htonl(skb ? sp->hdr.serial : 0);
 		pkt.ack.reason		= skb ? RXRPC_ACK_DUPLICATE : RXRPC_ACK_IDLE;
 		pkt.ack.nAcks		= 0;
-		ack_info.rxMTU		= htonl(rxrpc_rx_mtu);
-		ack_info.maxMTU		= htonl(mtu);
-		ack_info.rwind		= htonl(rxrpc_rx_window_size);
-		ack_info.jumbo_max	= htonl(rxrpc_rx_jumbo_max);
+		trailer.maxMTU		= htonl(rxrpc_rx_mtu);
+		trailer.ifMTU		= htonl(mtu);
+		trailer.rwind		= htonl(rxrpc_rx_window_size);
+		trailer.jumbo_max	= htonl(rxrpc_rx_jumbo_max);
 		pkt.whdr.flags		|= RXRPC_SLOW_START_OK;
 		padding			= 0;
 		iov[0].iov_len += sizeof(pkt.ack);
-		len += sizeof(pkt.ack) + 3 + sizeof(ack_info);
+		len += sizeof(pkt.ack) + 3 + sizeof(trailer);
 		ioc = 3;
 
 		trace_rxrpc_tx_ack(chan->call_debug_id, serial,
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index df8a271948..7aa58129ae 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -118,18 +118,13 @@ struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *lo
 	switch (srx->transport.family) {
 	case AF_INET:
 		if (peer->srx.transport.sin.sin_port !=
-		    srx->transport.sin.sin_port ||
-		    peer->srx.transport.sin.sin_addr.s_addr !=
-		    srx->transport.sin.sin_addr.s_addr)
+		    srx->transport.sin.sin_port)
 			goto not_found;
 		break;
 #ifdef CONFIG_AF_RXRPC_IPV6
 	case AF_INET6:
 		if (peer->srx.transport.sin6.sin6_port !=
-		    srx->transport.sin6.sin6_port ||
-		    memcmp(&peer->srx.transport.sin6.sin6_addr,
-			   &srx->transport.sin6.sin6_addr,
-			   sizeof(struct in6_addr)) != 0)
+		    srx->transport.sin6.sin6_port)
 			goto not_found;
 		break;
 #endif
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 9691de00ad..5dfda1ac51 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -9,6 +9,17 @@
 
 #include "ar-internal.h"
 
+/* Override priority when generating ACKs for received DATA */
+static const u8 rxrpc_ack_priority[RXRPC_ACK__INVALID] = {
+	[RXRPC_ACK_IDLE]		= 1,
+	[RXRPC_ACK_DELAY]		= 2,
+	[RXRPC_ACK_REQUESTED]		= 3,
+	[RXRPC_ACK_DUPLICATE]		= 4,
+	[RXRPC_ACK_EXCEEDS_WINDOW]	= 5,
+	[RXRPC_ACK_NOSPACE]		= 6,
+	[RXRPC_ACK_OUT_OF_SEQUENCE]	= 7,
+};
+
 static void rxrpc_proto_abort(struct rxrpc_call *call, rxrpc_seq_t seq,
 			      enum rxrpc_abort_reason why)
 {
@@ -366,7 +377,7 @@ static void rxrpc_input_queue_data(struct rxrpc_call *call, struct sk_buff *skb,
  * Process a DATA packet.
  */
 static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
-				 bool *_notify)
+				 bool *_notify, rxrpc_serial_t *_ack_serial, int *_ack_reason)
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 	struct sk_buff *oos;
@@ -419,8 +430,6 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
 		/* Send an immediate ACK if we fill in a hole */
 		else if (!skb_queue_empty(&call->rx_oos_queue))
 			ack_reason = RXRPC_ACK_DELAY;
-		else
-			call->ackr_nr_unacked++;
 
 		window++;
 		if (after(window, wtop)) {
@@ -498,12 +507,16 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
 	}
 
 send_ack:
-	if (ack_reason >= 0)
-		rxrpc_send_ACK(call, ack_reason, serial,
-			       rxrpc_propose_ack_input_data);
-	else
-		rxrpc_propose_delay_ACK(call, serial,
-					rxrpc_propose_ack_input_data);
+	if (ack_reason >= 0) {
+		if (rxrpc_ack_priority[ack_reason] > rxrpc_ack_priority[*_ack_reason]) {
+			*_ack_serial = serial;
+			*_ack_reason = ack_reason;
+		} else if (rxrpc_ack_priority[ack_reason] == rxrpc_ack_priority[*_ack_reason] &&
+			   ack_reason == RXRPC_ACK_REQUESTED) {
+			*_ack_serial = serial;
+			*_ack_reason = ack_reason;
+		}
+	}
 }
 
 /*
@@ -514,9 +527,11 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
 	struct rxrpc_jumbo_header jhdr;
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb), *jsp;
 	struct sk_buff *jskb;
+	rxrpc_serial_t ack_serial = 0;
 	unsigned int offset = sizeof(struct rxrpc_wire_header);
 	unsigned int len = skb->len - offset;
 	bool notify = false;
+	int ack_reason = 0;
 
 	while (sp->hdr.flags & RXRPC_JUMBO_PACKET) {
 		if (len < RXRPC_JUMBO_SUBPKTLEN)
@@ -536,7 +551,7 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
 		jsp = rxrpc_skb(jskb);
 		jsp->offset = offset;
 		jsp->len = RXRPC_JUMBO_DATALEN;
-		rxrpc_input_data_one(call, jskb, &notify);
+		rxrpc_input_data_one(call, jskb, &notify, &ack_serial, &ack_reason);
 		rxrpc_free_skb(jskb, rxrpc_skb_put_jumbo_subpacket);
 
 		sp->hdr.flags = jhdr.flags;
@@ -549,7 +564,16 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
 
 	sp->offset = offset;
 	sp->len    = len;
-	rxrpc_input_data_one(call, skb, &notify);
+	rxrpc_input_data_one(call, skb, &notify, &ack_serial, &ack_reason);
+
+	if (ack_reason > 0) {
+		rxrpc_send_ACK(call, ack_reason, ack_serial,
+			       rxrpc_propose_ack_input_data);
+	} else {
+		call->ackr_nr_unacked++;
+		rxrpc_propose_delay_ACK(call, sp->hdr.serial,
+					rxrpc_propose_ack_input_data);
+	}
 	if (notify) {
 		trace_rxrpc_notify_socket(call->debug_id, sp->hdr.serial);
 		rxrpc_notify_socket(call);
@@ -670,14 +694,14 @@ static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
 /*
  * Process the extra information that may be appended to an ACK packet
  */
-static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
-				struct rxrpc_ackinfo *ackinfo)
+static void rxrpc_input_ack_trailer(struct rxrpc_call *call, struct sk_buff *skb,
+				    struct rxrpc_acktrailer *trailer)
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 	struct rxrpc_peer *peer;
 	unsigned int mtu;
 	bool wake = false;
-	u32 rwind = ntohl(ackinfo->rwind);
+	u32 rwind = ntohl(trailer->rwind);
 
 	if (rwind > RXRPC_TX_MAX_WINDOW)
 		rwind = RXRPC_TX_MAX_WINDOW;
@@ -688,10 +712,7 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
 		call->tx_winsize = rwind;
 	}
 
-	if (call->cong_ssthresh > rwind)
-		call->cong_ssthresh = rwind;
-
-	mtu = min(ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU));
+	mtu = min(ntohl(trailer->maxMTU), ntohl(trailer->ifMTU));
 
 	peer = call->peer;
 	if (mtu < peer->maxdata) {
@@ -837,7 +858,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 	struct rxrpc_ack_summary summary = { 0 };
 	struct rxrpc_ackpacket ack;
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
-	struct rxrpc_ackinfo info;
+	struct rxrpc_acktrailer trailer;
 	rxrpc_serial_t ack_serial, acked_serial;
 	rxrpc_seq_t first_soft_ack, hard_ack, prev_pkt, since;
 	int nr_acks, offset, ioffset;
@@ -917,11 +938,11 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 		goto send_response;
 	}
 
-	info.rxMTU = 0;
+	trailer.maxMTU = 0;
 	ioffset = offset + nr_acks + 3;
-	if (skb->len >= ioffset + sizeof(info) &&
-	    skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0)
-		return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_info);
+	if (skb->len >= ioffset + sizeof(trailer) &&
+	    skb_copy_bits(skb, ioffset, &trailer, sizeof(trailer)) < 0)
+		return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_trailer);
 
 	if (nr_acks > 0)
 		skb_condense(skb);
@@ -950,8 +971,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 	}
 
 	/* Parse rwind and mtu sizes if provided. */
-	if (info.rxMTU)
-		rxrpc_input_ackinfo(call, skb, &info);
+	if (trailer.maxMTU)
+		rxrpc_input_ack_trailer(call, skb, &trailer);
 
 	if (first_soft_ack == 0)
 		return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_zero);
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index 4a292f860a..cad6a7d18e 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -83,7 +83,7 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
 				 struct rxrpc_txbuf *txb,
 				 u16 *_rwind)
 {
-	struct rxrpc_ackinfo ackinfo;
+	struct rxrpc_acktrailer trailer;
 	unsigned int qsize, sack, wrap, to;
 	rxrpc_seq_t window, wtop;
 	int rsize;
@@ -126,16 +126,16 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
 	qsize = (window - 1) - call->rx_consumed;
 	rsize = max_t(int, call->rx_winsize - qsize, 0);
 	*_rwind = rsize;
-	ackinfo.rxMTU		= htonl(rxrpc_rx_mtu);
-	ackinfo.maxMTU		= htonl(mtu);
-	ackinfo.rwind		= htonl(rsize);
-	ackinfo.jumbo_max	= htonl(jmax);
+	trailer.maxMTU		= htonl(rxrpc_rx_mtu);
+	trailer.ifMTU		= htonl(mtu);
+	trailer.rwind		= htonl(rsize);
+	trailer.jumbo_max	= htonl(jmax);
 
 	*ackp++ = 0;
 	*ackp++ = 0;
 	*ackp++ = 0;
-	memcpy(ackp, &ackinfo, sizeof(ackinfo));
-	return txb->ack.nAcks + 3 + sizeof(ackinfo);
+	memcpy(ackp, &trailer, sizeof(trailer));
+	return txb->ack.nAcks + 3 + sizeof(trailer);
 }
 
 /*
diff --git a/net/rxrpc/protocol.h b/net/rxrpc/protocol.h
index e8ee4af43c..4fe6b4d20a 100644
--- a/net/rxrpc/protocol.h
+++ b/net/rxrpc/protocol.h
@@ -135,9 +135,9 @@ struct rxrpc_ackpacket {
 /*
  * ACK packets can have a further piece of information tagged on the end
  */
-struct rxrpc_ackinfo {
-	__be32		rxMTU;		/* maximum Rx MTU size (bytes) [AFS 3.3] */
-	__be32		maxMTU;		/* maximum interface MTU size (bytes) [AFS 3.3] */
+struct rxrpc_acktrailer {
+	__be32		maxMTU;		/* maximum Rx MTU size (bytes) [AFS 3.3] */
+	__be32		ifMTU;		/* maximum interface MTU size (bytes) [AFS 3.3] */
 	__be32		rwind;		/* Rx window size (packets) [AFS 3.4] */
 	__be32		jumbo_max;	/* max packets to stick into a jumbo packet [AFS 3.5] */
 };
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index 97704a9e84..9297dc20bf 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -209,13 +209,18 @@ int smc_ib_find_route(struct net *net, __be32 saddr, __be32 daddr,
 	if (IS_ERR(rt))
 		goto out;
 	if (rt->rt_uses_gateway && rt->rt_gw_family != AF_INET)
-		goto out;
-	neigh = rt->dst.ops->neigh_lookup(&rt->dst, NULL, &fl4.daddr);
-	if (neigh) {
-		memcpy(nexthop_mac, neigh->ha, ETH_ALEN);
-		*uses_gateway = rt->rt_uses_gateway;
-		return 0;
-	}
+		goto out_rt;
+	neigh = dst_neigh_lookup(&rt->dst, &fl4.daddr);
+	if (!neigh)
+		goto out_rt;
+	memcpy(nexthop_mac, neigh->ha, ETH_ALEN);
+	*uses_gateway = rt->rt_uses_gateway;
+	neigh_release(neigh);
+	ip_rt_put(rt);
+	return 0;
+
+out_rt:
+	ip_rt_put(rt);
 out:
 	return -ENOENT;
 }
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index cda0935a68..28f3749f6d 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -405,7 +405,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args,
 	clnt->cl_maxproc  = version->nrprocs;
 	clnt->cl_prog     = args->prognumber ? : program->number;
 	clnt->cl_vers     = version->number;
-	clnt->cl_stats    = program->stats;
+	clnt->cl_stats    = args->stats ? : program->stats;
 	clnt->cl_metrics  = rpc_alloc_iostats(clnt);
 	rpc_init_pipe_dir_head(&clnt->cl_pipedir_objects);
 	err = -ENOMEM;
@@ -691,6 +691,7 @@ struct rpc_clnt *rpc_clone_client(struct rpc_clnt *clnt)
 		.version	= clnt->cl_vers,
 		.authflavor	= clnt->cl_auth->au_flavor,
 		.cred		= clnt->cl_cred,
+		.stats		= clnt->cl_stats,
 	};
 	return __rpc_clone_client(&args, clnt);
 }
@@ -713,6 +714,7 @@ rpc_clone_client_set_auth(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
 		.version	= clnt->cl_vers,
 		.authflavor	= flavor,
 		.cred		= clnt->cl_cred,
+		.stats		= clnt->cl_stats,
 	};
 	return __rpc_clone_client(&args, clnt);
 }
@@ -1068,6 +1070,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
 		.version	= vers,
 		.authflavor	= old->cl_auth->au_flavor,
 		.cred		= old->cl_cred,
+		.stats		= old->cl_stats,
 	};
 	struct rpc_clnt *clnt;
 	int err;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 58f3dc8d0d..004d2bd8b4 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2645,6 +2645,7 @@ static void xs_tcp_tls_setup_socket(struct work_struct *work)
 		.xprtsec	= {
 			.policy		= RPC_XPRTSEC_NONE,
 		},
+		.stats		= upper_clnt->cl_stats,
 	};
 	unsigned int pflags = current->flags;
 	struct rpc_clnt *lower_clnt;
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index 5c9fd4791c..76284fc538 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -142,9 +142,9 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
 	if (fragid == FIRST_FRAGMENT) {
 		if (unlikely(head))
 			goto err;
-		*buf = NULL;
 		if (skb_has_frag_list(frag) && __skb_linearize(frag))
 			goto err;
+		*buf = NULL;
 		frag = skb_unshare(frag, GFP_ATOMIC);
 		if (unlikely(!frag))
 			goto err;
@@ -156,6 +156,11 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
 	if (!head)
 		goto err;
 
+	/* Either the input skb ownership is transferred to headskb
+	 * or the input skb is freed, clear the reference to avoid
+	 * bad access on error path.
+	 */
+	*buf = NULL;
 	if (skb_try_coalesce(head, frag, &headstolen, &delta)) {
 		kfree_skb_partial(frag, headstolen);
 	} else {
@@ -179,7 +184,6 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
 		*headbuf = NULL;
 		return 1;
 	}
-	*buf = NULL;
 	return 0;
 err:
 	kfree_skb(*buf);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index bd54a928ba..daac83aa89 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -14092,6 +14092,8 @@ static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
 error:
 	for (i = 0; i < new_coalesce.n_rules; i++) {
 		tmp_rule = &new_coalesce.rules[i];
+		if (!tmp_rule)
+			continue;
 		for (j = 0; j < tmp_rule->n_patterns; j++)
 			kfree(tmp_rule->patterns[j].mask);
 		kfree(tmp_rule->patterns);
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 1f374c8a17..cc3fd4177b 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -1013,7 +1013,7 @@ TRACE_EVENT(rdev_get_mpp,
 TRACE_EVENT(rdev_dump_mpp,
 	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev, int _idx,
 		 u8 *dst, u8 *mpp),
-	TP_ARGS(wiphy, netdev, _idx, mpp, dst),
+	TP_ARGS(wiphy, netdev, _idx, dst, mpp),
 	TP_STRUCT__entry(
 		WIPHY_ENTRY
 		NETDEV_ENTRY
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index bd4ce21d76..b2f7af63b7 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -388,11 +388,15 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
  */
 static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
 {
+	struct xfrm_offload *xo = xfrm_offload(skb);
 	int ihl = skb->data - skb_transport_header(skb);
 
 	if (skb->transport_header != skb->network_header) {
 		memmove(skb_transport_header(skb),
 			skb_network_header(skb), ihl);
+		if (xo)
+			xo->orig_mac_len =
+				skb_mac_header_was_set(skb) ? skb_mac_header_len(skb) : 0;
 		skb->network_header = skb->transport_header;
 	}
 	ip_hdr(skb)->tot_len = htons(skb->len + ihl);
@@ -403,11 +407,15 @@ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
 static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
 {
 #if IS_ENABLED(CONFIG_IPV6)
+	struct xfrm_offload *xo = xfrm_offload(skb);
 	int ihl = skb->data - skb_transport_header(skb);
 
 	if (skb->transport_header != skb->network_header) {
 		memmove(skb_transport_header(skb),
 			skb_network_header(skb), ihl);
+		if (xo)
+			xo->orig_mac_len =
+				skb_mac_header_was_set(skb) ? skb_mac_header_len(skb) : 0;
 		skb->network_header = skb->transport_header;
 	}
 	ipv6_hdr(skb)->payload_len = htons(skb->len + ihl -