Change in osmo-msc[master]: msc_tx_common_id(): fix potential NULL pointer dereference

[fixeria]

fixeria has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-msc/+/24575 )


Change subject: msc_tx_common_id(): fix potential NULL pointer dereference
......................................................................

msc_tx_common_id(): fix potential NULL pointer dereference

Reported by GCC 11.1.0.  msc_a_vsub() may return NULL.

Change-Id: Iebdd6399e819a03258398e6b7b453bda37e45a20
---
M src/libmsc/msc_a.c
1 file changed, 2 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/75/24575/1

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 = {

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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Change-Id: Iebdd6399e819a03258398e6b7b453bda37e45a20
Gerrit-Change-Number: 24575
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <vyanits...@sysmocom.de>
Gerrit-MessageType: newchange