Make a code path easier for static analyzers to understand

prev cannot be NULL here in the hostapd_eid_country_add() call since
prev is set whenever start becomes non-NULL. That seems to be a bit too
difficult for some static analyzers, so check the prev pointer
explicitly to avoid false warnings.

Signed-off-by: Jouni Malinen <j@w1.fi>

diff --git a/src/ap/beacon.c b/src/ap/beacon.c
index 2a4acf2..73dffe2 100644 (file)
--- a/src/ap/beacon.c
+++ b/src/ap/beacon.c
@@ -220,7 +220,7 @@ static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
                        continue; /* can use same entry */
                }
 
-               if (start) {
+               if (start && prev) {
                        pos = hostapd_eid_country_add(pos, end, chan_spacing,
                                                      start, prev);
                        start = NULL;