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From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH v2] Bluetooth: hci_event: Fix not indicating new connection for BIG Sync
Date: Wed, 31 Jan 2024 12:30:02 -0500
Message-ID: <20240131173002.834951-1-luiz.dentz@gmail.com>
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

BIG Sync (aka. Broadcast sink) requires to inform that the device is
connected when a data path is active otherwise userspace could attempt
to free resources allocated to the device object while scanning.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 net/bluetooth/hci_event.c | 18 +++++++++++-------
 net/bluetooth/mgmt.c      |  3 +++
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 31df5f5b7994..acd8a778eecc 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2526,9 +2526,7 @@ static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
 	 * Only those in BT_CONFIG or BT_CONNECTED states can be
 	 * considered connected.
 	 */
-	if (conn &&
-	    (conn->state == BT_CONFIG || conn->state == BT_CONNECTED) &&
-	    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+	if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
 		mgmt_device_connected(hdev, conn, name, name_len);
 
 	if (discov->state == DISCOVERY_STOPPED)
@@ -3760,8 +3758,9 @@ static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
 		bacpy(&cp.bdaddr, &conn->dst);
 		cp.pscan_rep_mode = 0x02;
 		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
-	} else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+	} else {
 		mgmt_device_connected(hdev, conn, NULL, 0);
+	}
 
 	if (!hci_outgoing_auth_needed(hdev, conn)) {
 		conn->state = BT_CONNECTED;
@@ -3934,6 +3933,11 @@ static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
 		 * last.
 		 */
 		hci_connect_cfm(conn, rp->status);
+
+		/* Notify device connected in case it is a BIG Sync */
+		if (test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
+			mgmt_device_connected(hdev, conn, NULL, 0);
+
 		break;
 	}
 
@@ -5008,8 +5012,9 @@ static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
 		bacpy(&cp.bdaddr, &conn->dst);
 		cp.pscan_rep_mode = 0x02;
 		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
-	} else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+	} else {
 		mgmt_device_connected(hdev, conn, NULL, 0);
+	}
 
 	if (!hci_outgoing_auth_needed(hdev, conn)) {
 		conn->state = BT_CONNECTED;
@@ -5982,8 +5987,7 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 		goto unlock;
 	}
 
-	if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
-		mgmt_device_connected(hdev, conn, NULL, 0);
+	mgmt_device_connected(hdev, conn, NULL, 0);
 
 	conn->sec_level = BT_SECURITY_LOW;
 	conn->state = BT_CONFIG;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 8c4493255f92..211da120ff12 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -9689,6 +9689,9 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
 	u16 eir_len = 0;
 	u32 flags = 0;
 
+	if (test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		return;
+
 	/* allocate buff for LE or BR/EDR adv */
 	if (conn->le_adv_data_len > 0)
 		skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_CONNECTED,
-- 
2.43.0