Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

6 files changed, 85 insertions, 65 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 8671bc79a35b..ca01d1861854 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -610,11 +610,6 @@ static void hci_req_add_le_create_conn(struct hci_request *req,
 	if (hci_update_random_address(req, false, &own_addr_type))
 		return;
 
-	/* Save the address type used for this connnection attempt so we able
-	 * to retrieve this information if we need it.
-	 */
-	conn->src_type = own_addr_type;
-
 	cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
 	cp.scan_window = cpu_to_le16(hdev->le_scan_window);
 	bacpy(&cp.peer_addr, &conn->dst);
@@ -894,7 +889,7 @@ static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
 		/* If we're already encrypted set the REAUTH_PEND flag,
 		 * otherwise set the ENCRYPT_PEND.
 		 */
-		if (conn->key_type != 0xff)
+		if (conn->link_mode & HCI_LM_ENCRYPT)
 			set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
 		else
 			set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 21e5913d12e0..640c54ec1bd2 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -48,6 +48,10 @@ static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
 	smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
 	wake_up_bit(&hdev->flags, HCI_INQUIRY);
 
+	hci_dev_lock(hdev);
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+	hci_dev_unlock(hdev);
+
 	hci_conn_check_pending(hdev);
 }
 
@@ -3537,7 +3541,11 @@ static void hci_io_capa_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 			cp.authentication = conn->auth_type;
 
 			/* Request MITM protection if our IO caps allow it
-			 * except for the no-bonding case
+			 * except for the no-bonding case.
+			 * conn->auth_type is not updated here since
+			 * that might cause the user confirmation to be
+			 * rejected in case the remote doesn't have the
+			 * IO capabilities for MITM.
 			 */
 			if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
 			    cp.authentication != HCI_AT_NO_BONDING)
@@ -3628,8 +3636,11 @@ static void hci_user_confirm_request_evt(struct hci_dev *hdev,
 
 		/* If we're not the initiators request authorization to
 		 * proceed from user space (mgmt_user_confirm with
-		 * confirm_hint set to 1). */
-		if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+		 * confirm_hint set to 1). The exception is if neither
+		 * side had MITM in which case we do auto-accept.
+		 */
+		if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
+		    (loc_mitm || rem_mitm)) {
 			BT_DBG("Confirming auto-accept as acceptor");
 			confirm_hint = 1;
 			goto confirm;
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 6eabbe05fe54..323f23cd2c37 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -1663,7 +1663,13 @@ static void l2cap_conn_del(struct hci_conn *hcon, int err)
 	kfree_skb(conn->rx_skb);
 
 	skb_queue_purge(&conn->pending_rx);
-	flush_work(&conn->pending_rx_work);
+
+	/* We can not call flush_work(&conn->pending_rx_work) here since we
+	 * might block if we are running on a worker from the same workqueue
+	 * pending_rx_work is waiting on.
+	 */
+	if (work_pending(&conn->pending_rx_work))
+		cancel_work_sync(&conn->pending_rx_work);
 
 	l2cap_unregister_all_users(conn);
 
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index ade3fb4c23bc..e1378693cc90 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -787,11 +787,6 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
 
 		/*change security for LE channels */
 		if (chan->scid == L2CAP_CID_ATT) {
-			if (!conn->hcon->out) {
-				err = -EINVAL;
-				break;
-			}
-
 			if (smp_conn_security(conn->hcon, sec.level))
 				break;
 			sk->sk_state = BT_CONFIG;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 0fce54412ffd..af8e0a6243b7 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1047,6 +1047,43 @@ static void clean_up_hci_complete(struct hci_dev *hdev, u8 status)
 	}
 }
 
+static void hci_stop_discovery(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_remote_name_req_cancel cp;
+	struct inquiry_entry *e;
+
+	switch (hdev->discovery.state) {
+	case DISCOVERY_FINDING:
+		if (test_bit(HCI_INQUIRY, &hdev->flags)) {
+			hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
+		} else {
+			cancel_delayed_work(&hdev->le_scan_disable);
+			hci_req_add_le_scan_disable(req);
+		}
+
+		break;
+
+	case DISCOVERY_RESOLVING:
+		e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
+						     NAME_PENDING);
+		if (!e)
+			return;
+
+		bacpy(&cp.bdaddr, &e->data.bdaddr);
+		hci_req_add(req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp),
+			    &cp);
+
+		break;
+
+	default:
+		/* Passive scanning */
+		if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+			hci_req_add_le_scan_disable(req);
+		break;
+	}
+}
+
 static int clean_up_hci_state(struct hci_dev *hdev)
 {
 	struct hci_request req;
@@ -1063,9 +1100,7 @@ static int clean_up_hci_state(struct hci_dev *hdev)
 	if (test_bit(HCI_ADVERTISING, &hdev->dev_flags))
 		disable_advertising(&req);
 
-	if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
-		hci_req_add_le_scan_disable(&req);
-	}
+	hci_stop_discovery(&req);
 
 	list_for_each_entry(conn, &hdev->conn_hash.list, list) {
 		struct hci_cp_disconnect dc;
@@ -2996,8 +3031,13 @@ static int user_pairing_resp(struct sock *sk, struct hci_dev *hdev,
 	}
 
 	if (addr->type == BDADDR_LE_PUBLIC || addr->type == BDADDR_LE_RANDOM) {
-		/* Continue with pairing via SMP */
+		/* Continue with pairing via SMP. The hdev lock must be
+		 * released as SMP may try to recquire it for crypto
+		 * purposes.
+		 */
+		hci_dev_unlock(hdev);
 		err = smp_user_confirm_reply(conn, mgmt_op, passkey);
+		hci_dev_lock(hdev);
 
 		if (!err)
 			err = cmd_complete(sk, hdev->id, mgmt_op,
@@ -3574,8 +3614,6 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
 {
 	struct mgmt_cp_stop_discovery *mgmt_cp = data;
 	struct pending_cmd *cmd;
-	struct hci_cp_remote_name_req_cancel cp;
-	struct inquiry_entry *e;
 	struct hci_request req;
 	int err;
 
@@ -3605,52 +3643,22 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
 
 	hci_req_init(&req, hdev);
 
-	switch (hdev->discovery.state) {
-	case DISCOVERY_FINDING:
-		if (test_bit(HCI_INQUIRY, &hdev->flags)) {
-			hci_req_add(&req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
-		} else {
-			cancel_delayed_work(&hdev->le_scan_disable);
-
-			hci_req_add_le_scan_disable(&req);
-		}
-
-		break;
+	hci_stop_discovery(&req);
 
-	case DISCOVERY_RESOLVING:
-		e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
-						     NAME_PENDING);
-		if (!e) {
-			mgmt_pending_remove(cmd);
-			err = cmd_complete(sk, hdev->id,
-					   MGMT_OP_STOP_DISCOVERY, 0,
-					   &mgmt_cp->type,
-					   sizeof(mgmt_cp->type));
-			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
-			goto unlock;
-		}
-
-		bacpy(&cp.bdaddr, &e->data.bdaddr);
-		hci_req_add(&req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp),
-			    &cp);
-
-		break;
-
-	default:
-		BT_DBG("unknown discovery state %u", hdev->discovery.state);
-
-		mgmt_pending_remove(cmd);
-		err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
-				   MGMT_STATUS_FAILED, &mgmt_cp->type,
-				   sizeof(mgmt_cp->type));
+	err = hci_req_run(&req, stop_discovery_complete);
+	if (!err) {
+		hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
 		goto unlock;
 	}
 
-	err = hci_req_run(&req, stop_discovery_complete);
-	if (err < 0)
-		mgmt_pending_remove(cmd);
-	else
-		hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
+	mgmt_pending_remove(cmd);
+
+	/* If no HCI commands were sent we're done */
+	if (err == -ENODATA) {
+		err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY, 0,
+				   &mgmt_cp->type, sizeof(mgmt_cp->type));
+		hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+	}
 
 unlock:
 	hci_dev_unlock(hdev);
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 3d1cc164557d..f2829a7932e2 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -544,7 +544,7 @@ static u8 smp_random(struct smp_chan *smp)
 		hci_le_start_enc(hcon, ediv, rand, stk);
 		hcon->enc_key_size = smp->enc_key_size;
 	} else {
-		u8 stk[16];
+		u8 stk[16], auth;
 		__le64 rand = 0;
 		__le16 ediv = 0;
 
@@ -556,8 +556,13 @@ static u8 smp_random(struct smp_chan *smp)
 		memset(stk + smp->enc_key_size, 0,
 		       SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
 
+		if (hcon->pending_sec_level == BT_SECURITY_HIGH)
+			auth = 1;
+		else
+			auth = 0;
+
 		hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
-			    HCI_SMP_STK_SLAVE, 0, stk, smp->enc_key_size,
+			    HCI_SMP_STK_SLAVE, auth, stk, smp->enc_key_size,
 			    ediv, rand);
 	}