wireless, wl1251: Fix potential NULL pointer dereference in wl1251_op…

…_bss_info_changed() In drivers/net/wireless/wl1251/main.c:wl1251_op_bss_info_changed() we make a call to ieee80211_beacon_get() which may return NULL, but we do not check the return value before dereferencing the pointer. Signed-off-by: Jesper Juhl <[email protected]> Signed-off-by: John W. Linville <[email protected]>
adn770 · Feb 3, 2011 · 4d048aa · 4d048aa
1 parent 4334ec8
commit 4d048aa
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/net/wireless/wl1251/main.c b/drivers/net/wireless/wl1251/main.c
@@ -1039,6 +1039,9 @@ static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 
 	if (changed & BSS_CHANGED_BEACON) {
 		beacon = ieee80211_beacon_get(hw, vif);
+		if (!beacon)
+			goto out_sleep;
+
 		ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
 					      beacon->len);