radius: Sanity check for NULL pointer segfault

When the RADIUS client has not yet been fully enabled, MIB command was
segfaulting hostapd.

Signed-off-by: Eduardo Abinader <eduardoabinader@gmail.com>

diff --git a/src/radius/radius_client.c b/src/radius/radius_client.c
index a4edd5f..06c804d 100644 (file)
--- a/src/radius/radius_client.c
+++ b/src/radius/radius_client.c
@@ -1636,11 +1636,16 @@ static int radius_client_dump_acct_server(char *buf, size_t buflen,
 int radius_client_get_mib(struct radius_client_data *radius, char *buf,
                          size_t buflen)
 {
-       struct hostapd_radius_servers *conf = radius->conf;
+       struct hostapd_radius_servers *conf;
        int i;
        struct hostapd_radius_server *serv;
        int count = 0;
 
+       if (!radius)
+               return 0;
+
+       conf = radius->conf;
+
        if (conf->auth_servers) {
                for (i = 0; i < conf->num_auth_servers; i++) {
                        serv = &conf->auth_servers[i];