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mt76x2: fix possible NULL pointer dereferencing in mt76x2_tx() 

Fix a theoretical NULL pointer dereferencing in mt76x2_tx routine that
can occurs for injected frames in a monitor vif since vif pointer could
be NULL for that interfaces

Fixes: 2340523646 ("mt76: fix transmission of encrypted mgmt frames")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Acked-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Lorenzo Bianconi 2018-03-17 12:29:27 +01:00 committed by Kalle Valo
parent db2ad7c25a
commit 6958b02743
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/mediatek/mt76/mt76x2_tx.c
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@ -36,9 +36,12 @@ void mt76x2_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
msta = (struct mt76x2_sta *) control->sta->drv_priv;
wcid = &msta->wcid;
/* sw encrypted frames */
if (!info->control.hw_key && wcid->hw_key_idx != -1)
control->sta = NULL;
}
if (vif || (!info->control.hw_key && wcid->hw_key_idx != -1)) {
if (vif && !control->sta) {
struct mt76x2_vif *mvif;
mvif = (struct mt76x2_vif *) vif->drv_priv;