[PATCH BlueZ] shared/bap: check lpac type in bap_bcast_stream_new()

[Pauli Virtanen <pav@xxxxxx>]

bap_bcast_stream_new() shall refuse to create streams if lpac is not of
broadcast type.
---

Notes:
    I ran across an unreproducible crash, where during connection dropping a
    crash occurred IIRC due to stream->rpac == NULL, as if bt_bap_stream_new()
    had produced a bcast stream for unicast lpac.
    
    Not sure if it is actually possible that bt_bap_stream_new() is called
    from unicast setup when bt_bap_get_att(bap) == false (via
    gatt_client_ready callback?), but it's probably better to check the lpac
    type here regardless.

 src/shared/bap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/shared/bap.c b/src/shared/bap.c
index f0c6f6485..854855f6b 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -6155,6 +6155,8 @@ static struct bt_bap_stream *bap_bcast_stream_new(struct bt_bap *bap,
 		ep = queue_find(bap->remote_eps, find_ep_source, NULL);
 		if (!ep)
 			return NULL;
+	} else if (lpac->type != BT_BAP_BCAST_SINK) {
+		return NULL;
 	}
 
 	if (!stream)
-- 
2.49.0