silent_call: check return value of trans_alloc() against NULL
We're checking the result of trans_alloc() 6 out of 7 times, so check
it in gsm_silent_call_start() too, for the sake of consistency.
Change-Id: Ie989cd8146d66d9531cf3f3d84f46a2c6fcc2e5c
Fixes: CID#322140
diff --git a/src/libmsc/silent_call.c b/src/libmsc/silent_call.c
index 3b95a90..4de12b9 100644
--- a/src/libmsc/silent_call.c
+++ b/src/libmsc/silent_call.c
@@ -140,7 +140,11 @@
struct vty *vty)
{
struct gsm_network *net = vsub->vlr->user_ctx;
- struct gsm_trans *trans = trans_alloc(net, vsub, TRANS_SILENT_CALL, 0, 0);
+ struct gsm_trans *trans;
+
+ trans = trans_alloc(net, vsub, TRANS_SILENT_CALL, 0, 0);
+ if (trans == NULL)
+ return -ENODEV;
trans->silent_call.ct = *ct;
if (traffic_dst_ip) {