rtw89: Fix variable dereferenced before check 'sta'
The pointer rtwsta is dereferencing pointer sta before sta is being null
checked. Fix this by assigning sta->drv_priv to rtwsta only if sta is not
NULL, otherwise just NULL.
Fixes: e3ec7017f6
("rtw89: add Realtek 802.11ax driver")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211022061242.8383-1-pkshih@realtek.com
This commit is contained in:
Родитель
c6477cb237
Коммит
5d44f06723
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@ -1412,7 +1412,7 @@ static void rtw89_core_ba_work(struct work_struct *work)
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list_for_each_entry_safe(rtwtxq, tmp, &rtwdev->ba_list, list) {
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struct ieee80211_txq *txq = rtw89_txq_to_txq(rtwtxq);
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struct ieee80211_sta *sta = txq->sta;
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struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
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struct rtw89_sta *rtwsta = sta ? (struct rtw89_sta *)sta->drv_priv : NULL;
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u8 tid = txq->tid;
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if (!sta) {
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@ -1462,7 +1462,7 @@ static void rtw89_core_txq_check_agg(struct rtw89_dev *rtwdev,
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struct ieee80211_hw *hw = rtwdev->hw;
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struct ieee80211_txq *txq = rtw89_txq_to_txq(rtwtxq);
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struct ieee80211_sta *sta = txq->sta;
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struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
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struct rtw89_sta *rtwsta = sta ? (struct rtw89_sta *)sta->drv_priv : NULL;
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if (unlikely(skb_get_queue_mapping(skb) == IEEE80211_AC_VO))
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return;
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@ -1534,7 +1534,7 @@ static bool rtw89_core_txq_agg_wait(struct rtw89_dev *rtwdev,
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{
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struct rtw89_txq *rtwtxq = (struct rtw89_txq *)txq->drv_priv;
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struct ieee80211_sta *sta = txq->sta;
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struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
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struct rtw89_sta *rtwsta = sta ? (struct rtw89_sta *)sta->drv_priv : NULL;
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if (!sta || rtwsta->max_agg_wait <= 0)
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return false;
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