Bluetooth: iso: fix socket matching ambiguity between BIS and CIS

When both BIS and CIS links exist, their sockets are in
the BT_LISTEN state.
dump sock:
  sk 000000001977ef51 state 6
  src 10:a5:62:31:05:cf dst 00:00:00:00:00:00
  sk 0000000031d28700 state 7
  src 10:a5:62:31:05:cf dst00:00:00:00:00:00
  sk 00000000613af00e state 4   # listen sock of bis
  src 10:a5:62:31:05:cf dst 54:00:00:d4:99:30
  sk 000000001710468c state 9
  src 10:a5:62:31:05:cf dst 54:00:00:d4:99:30
  sk 000000005d97dfde state 4   #listen sock of cis
  src 10:a5:62:31:05:cf dst 00:00:00:00:00:00

To locate the CIS socket correctly, check both the BT_LISTEN
state and whether dst addr is BDADDR_ANY.

Link: bluez/bluez#1224
Signed-off-by: Yang Li <[email protected]>
Signed-off-by: Luiz Augusto von Dentz <[email protected]>

Author: Yang Li

net/bluetooth/iso.c

@@ -2021,6 +2021,11 @@ static bool iso_match_pa_sync_flag(struct sock *sk, void *data)
 	return test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags);
 }
 
+static bool iso_match_dst(struct sock *sk, void *data)
+{
+	return !bacmp(&iso_pi(sk)->dst, (bdaddr_t *)data);
+}
+
 static void iso_conn_ready(struct iso_conn *conn)
 {
 	struct sock *parent = NULL;
@@ -2105,7 +2110,7 @@ static void iso_conn_ready(struct iso_conn *conn)
 
 		if (!parent)
 			parent = iso_get_sock(hdev, &hcon->src, BDADDR_ANY,
-					      BT_LISTEN, NULL, NULL);
+					      BT_LISTEN, iso_match_dst, BDADDR_ANY);
 
 		if (!parent)
 			return;
@@ -2374,7 +2379,7 @@ int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
 		}
 	} else {
 		sk = iso_get_sock(hdev, &hdev->bdaddr, BDADDR_ANY,
-				  BT_LISTEN, NULL, NULL);
+				  BT_LISTEN, iso_match_dst, BDADDR_ANY);
 	}
 
 done: