mac80211: fix NULL pointer dereference in ieee80211_compatible_rates
Fix a possible NULL pointer dereference in ieee80211_compatible_rates
introduced in the patch "mac80211: fix association with some APs". If no bss
is available just use all supported rates in the association request.
Signed-off-by: Helmut Schaa <hschaa@suse.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e470bf1..7cfd12e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -730,7 +730,17 @@
if (bss->wmm_ie) {
wmm = 1;
}
+
+ /* get all rates supported by the device and the AP as
+ * some APs don't like getting a superset of their rates
+ * in the association request (e.g. D-Link DAP 1353 in
+ * b-only mode) */
+ rates_len = ieee80211_compatible_rates(bss, sband, &rates);
+
ieee80211_rx_bss_put(dev, bss);
+ } else {
+ rates = ~0;
+ rates_len = sband->n_bitrates;
}
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
@@ -761,10 +771,7 @@
*pos++ = ifsta->ssid_len;
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
- /* all supported rates should be added here but some APs
- * (e.g. D-Link DAP 1353 in b-only mode) don't like that
- * Therefore only add rates the AP supports */
- rates_len = ieee80211_compatible_rates(bss, sband, &rates);
+ /* add all rates which were marked to be used above */
supp_rates_len = rates_len;
if (supp_rates_len > 8)
supp_rates_len = 8;