Bug 1464069 - Check for null message in nr_stun_decode_message; r=drno

MozReview-Commit-ID: B1SHDte4miv

--HG--
extra : rebase_source : e60dc6b48319f3cfcff2b3411f7eb8cd8928408e

media/mtransport/third_party/nICEr/src/stun/stun_codec.c

@@ -1415,6 +1415,9 @@ nr_stun_decode_message(nr_stun_message *msg, int (*get_password)(void *arg, nr_s
     nr_stun_attr_info *attr_info;
     Data *password;
 
+    if (!msg)
+        ABORT(R_BAD_ARGS);
+
     r_log(NR_LOG_STUN, LOG_DEBUG, "Parsing STUN message of %d bytes", msg->length);
 
     if (!TAILQ_EMPTY(&msg->attributes))