From 4d048aac990d587c81fc1002e28502e6f95371ee Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Thu, 3 Feb 2011 21:14:01 +0100 Subject: 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 Signed-off-by: John W. Linville --- drivers/net/wireless/wl1251/main.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/net/wireless/wl1251') diff --git a/drivers/net/wireless/wl1251/main.c b/drivers/net/wireless/wl1251/main.c index 012e1a4016f..40372bac948 100644 --- 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); -- cgit v1.2.3