gsupplicant: Do not access IE array past end of buffer

IE list was traversed past buffer limit in the last round.

diff --git a/gsupplicant/supplicant.c b/gsupplicant/supplicant.c
index e5743f0..2586075 100644 (file)
--- a/gsupplicant/supplicant.c
+++ b/gsupplicant/supplicant.c
@@ -1167,7 +1167,9 @@ static void bss_process_ies(DBusMessageIter *iter, void *user_data)
        if (ie == NULL || ie_len < 2)
                return;
 
-       for (ie_end = ie+ie_len; ie+ie[1]+1 <= ie_end; ie += ie[1]+2) {
+       for (ie_end = ie + ie_len; ie < ie_end && ie + ie[1] + 1 <= ie_end;
+                                                       ie += ie[1] + 2) {
+
                if (ie[0] != WMM_WPA1_WPS_INFO || ie[1] < WPS_INFO_MIN_LEN ||
                        memcmp(ie+2, WPS_OUI, sizeof(WPS_OUI)) != 0)
                        continue;