Bluetooth: BAP: Add check to verify that eps have correct iso

Add a check that verifies that 2 endpoints from different
connection don't share a CIS, which would be invalid.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

subsys/bluetooth/audio/bap_unicast_client.c

@@ -3355,6 +3355,8 @@ int bt_bap_unicast_client_qos(struct bt_conn *conn, struct bt_bap_unicast_group
 	sink_pd = group->sink_pd;
 
 	SYS_SLIST_FOR_EACH_CONTAINER(&group->streams, stream, _node) {
+		const struct bt_bap_ep *paired_ep;
+
 		if (stream->conn != conn) {
 			/* Channel not part of this ACL, skip */
 			continue;
@@ -3366,6 +3368,17 @@ int bt_bap_unicast_client_qos(struct bt_conn *conn, struct bt_bap_unicast_group
 			return -EINVAL;
 		}
 
+		paired_ep = bt_bap_iso_get_paired_ep(ep);
+		if (paired_ep != NULL && paired_ep->stream != NULL &&
+		    paired_ep->stream->conn != NULL && paired_ep->stream->conn != stream->conn) {
+			LOG_DBG("Misconfigured group %p: Stream %p has endpoint %p for conn %p "
+				"paired with endpoint %p for conn %p",
+				group, stream, ep, stream->conn, paired_ep,
+				paired_ep->stream->conn);
+
+			return -EINVAL;
+		}
+
 		/* Can only be done if all the streams are in the codec
 		 * configured state or the QoS configured state
 		 */