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wireless, wl1251: Fix potential NULL pointer dereference in wl1251_op_bss_info_changed()

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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>
This commit is contained in:
Jesper Juhl 2011-02-03 21:14:01 +01:00 committed by John W. Linville
parent 4334ec8518
commit 4d048aac99
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/wl1251/main.c
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@ -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);