If there is already a subscriber and it does not equal to us -> moan

And unreference the gsm_subscriber object otherwise we would leak.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c
index c84e76186..130a4282e 100644
--- a/src/gsm_04_08.c
+++ b/src/gsm_04_08.c
@@ -603,6 +603,11 @@ static int gsm48_rx_mm_serv_req(struct msgb *msg)
 
 	if (!msg->lchan->subscr)
 		msg->lchan->subscr = subscr;
+	else if (msg->lchan->subscr != subscr) {
+		DEBUGP(DMM, "<- CM Channel already owned by someone else?\n");
+		subscr_put(subscr);
+	}
+
 	return gsm48_tx_mm_serv_ack(msg->lchan);
 }