ns2: Add sanity check
Prevent memory corruption or segfaults by asserting that NSE and bind
link layer match. A mismatch should never happen and might cause the
bind to access invalid memory when sending because nsvc->priv doesn't
match what it expects.
Change-Id: I7ca4cd1c5dac8b5e44ffc4825b9373b2d04911ab
Related: OS#4948
diff --git a/src/gb/gprs_ns2.c b/src/gb/gprs_ns2.c
index e43b636..3ca87a4 100644
--- a/src/gb/gprs_ns2.c
+++ b/src/gb/gprs_ns2.c
@@ -490,6 +490,9 @@
struct gprs_ns2_vc *ns2_vc_alloc(struct gprs_ns2_vc_bind *bind, struct gprs_ns2_nse *nse, bool initiater,
enum gprs_ns2_vc_mode vc_mode)
{
+ /* Sanity check */
+ OSMO_ASSERT(bind->ll == nse->ll);
+
struct gprs_ns2_vc *nsvc = talloc_zero(bind, struct gprs_ns2_vc);
if (!nsvc)