[PATCH AUTOSEL 5.16 154/217] mt76: connac: fix a theoretical NULL pointer dereference in mt76_connac_get_phy_mode
STALE1720d
From: Sasha Levin <sashal@kernel.org>
Date: 2022-01-18 02:34:25
Also in:
linux-arm-kernel, linux-mediatek, linux-wireless, lkml, stable
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
From: Lorenzo Bianconi <lorenzo@kernel.org> [ 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@kernel.org> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 26b4b875dcc02..bcb596664b3e9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c@@ -1179,7 +1179,7 @@ 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;
@@ -1190,7 +1190,7 @@ 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