Interworking: Check NULL string to avoid compiler warning

Fix warning by gcc 9.2.1.

interworking.c: In function ‘interworking_home_sp_cred’:
interworking.c:2263:3: warning: ‘%s’ directive argument is null [-Wformat-overflow=]
 2263 |   wpa_msg(wpa_s, MSG_DEBUG,
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~
 2264 |    "Interworking: Search for match with SIM/USIM domain %s",
      |    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2265 |    realm);
      |    ~~~~~~

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>

diff --git a/wpa_supplicant/interworking.c b/wpa_supplicant/interworking.c
index 0261bb7b8fd761b27d67c84d2bd6cd76cc4cddb7..d8e9c95a739d0af9070e3965aac65fb9457662f7 100644 (file)
--- a/wpa_supplicant/interworking.c
+++ b/wpa_supplicant/interworking.c
@@ -2262,7 +2262,7 @@ int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
                        realm++;
                wpa_msg(wpa_s, MSG_DEBUG,
                        "Interworking: Search for match with SIM/USIM domain %s",
-                       realm);
+                       realm ? realm : "[NULL]");
                if (realm &&
                    domain_name_list_contains(domain_names, realm, 1))
                        return 1;