msc_tx_common_id(): fix potential NULL pointer dereference
Reported by GCC 11.1.0. msc_a_vsub() may return NULL.
Change-Id: Iebdd6399e819a03258398e6b7b453bda37e45a20
diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index 391d251..05030d3 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -1638,6 +1638,8 @@
int msc_tx_common_id(struct msc_a *msc_a, enum msc_role to_role)
{
struct vlr_subscr *vsub = msc_a_vsub(msc_a);
+ if (vsub == NULL)
+ return -ENODEV;
struct ran_msg msg = {
.msg_type = RAN_MSG_COMMON_ID,
.common_id = {