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> linux-2.6.39-wireless-wl1251-Fix-potential-NULL-pointer-dereferen.patch
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File linux-2.6.39-wireless-wl1251-Fix-potential-NULL-pointer-dereferen.patch of Package kernel-adaptation-n900
From 9b74884f682df18e85eaaf7e82729e229ac919ce Mon Sep 17 00:00:00 2001 From: Jesper Juhl <jj@chaosbits.net> Date: Thu, 3 Feb 2011 20:14:01 +0100 Subject: [PATCH] wireless, wl1251: Fix potential NULL pointer dereference in wl1251_op_bss_info_changed() 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 <jj@chaosbits.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> --- drivers/net/wireless/wl1251/main.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/wl1251/main.c b/drivers/net/wireless/wl1251/main.c index 56b3b78..fd85532 100644 --- a/drivers/net/wireless/wl1251/main.c +++ b/drivers/net/wireless/wl1251/main.c @@ -1147,6 +1147,9 @@ 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); -- 1.7.0.4