Add check for non existing lchan at tch_frame_down()
Traffic cannot sent to BTS, if there is (currently) no logical channel
associated with the transaction.
This happens, if TCH traffic is received from upper layer, but there is
no lchan available before completing immediate assignment, handover or
assignment process.
[hfreyther: The code has not been moved to tch_frame_down
but the issue looks similiar]
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 02ffe58..ff5d38d 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -3005,6 +3005,10 @@
LOGP(DMNCC, LOGL_NOTICE, "TCH frame for trans without conn\n");
return 0;
}
+ if (!trans->conn->lchan) {
+ LOGP(DMNCC, LOGL_NOTICE, "TCH frame for trans without lchan\n");
+ return 0;
+ }
if (trans->conn->lchan->type != GSM_LCHAN_TCH_F
&& trans->conn->lchan->type != GSM_LCHAN_TCH_H) {
/* This should be LOGL_ERROR or NOTICE, but