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mt76x2: fix possible NULL pointer dereferencing in mt76x2_tx()

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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: 23405236460b ("mt76: fix transmission of encrypted mgmt frames")
Signed-off-by: Lorenzo Bianconi <[email protected]>
This commit is contained in:
Lorenzo Bianconi
2018-03-19 21:38:25 +01:00
committed by Felix Fietkau
parent ffa2069e78
commit c66094e92d
1 changed files with 4 additions and 1 deletions
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mt76x2_tx.c
+4 -1
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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;