[PATCH 5.16 0671/1039] mt76: connac: fix a theoretical NULL pointer dereference in mt76_connac_get_phy_mode
From: Greg Kroah-Hartman
Date: Mon Jan 24 2022 - 19:08:15 EST
From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
[ Upstream commit c9dbeac4988f6d4c4211b3747ec9c9c75ea87967 ]
Even if it is not a real bug since mt76_connac_get_phy_mode runs just
for mt7921 where only STA is supported, fix a theoretical NULL pointer
dereference if new added modes do not support HE
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index a5857a788da50..7733c8fad2413 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
@@ -1180,7 +1180,7 @@ mt76_connac_get_phy_mode(struct mt76_phy *phy, struct ieee80211_vif *vif,
if (ht_cap->ht_supported)
mode |= PHY_MODE_GN;
- if (he_cap->has_he)
+ if (he_cap && he_cap->has_he)
mode |= PHY_MODE_AX_24G;
} else if (band == NL80211_BAND_5GHZ || band == NL80211_BAND_6GHZ) {
mode |= PHY_MODE_A;
@@ -1191,7 +1191,7 @@ mt76_connac_get_phy_mode(struct mt76_phy *phy, struct ieee80211_vif *vif,
if (vht_cap->vht_supported)
mode |= PHY_MODE_AC;
- if (he_cap->has_he) {
+ if (he_cap && he_cap->has_he) {
if (band == NL80211_BAND_6GHZ)
mode |= PHY_MODE_AX_6G;
else
--
2.34.1