From: Zichen Xie <zichenxie0106@xxxxxxxxx>
mt76_connac_get_he_phy_cap() may return a NULL pointer,
leading to NULL Pointer Dereference.
Add a NULL check for the returned pointer.
Fixes: a5c372f77aa7 ("wifi: mt76: mt7925: extend mt7925_mcu_bss_he_tlv for per-link BSS")
Fixes: e6d557a78b60 ("mt76: mt7915: rely on mt76_connac_get_phy utilities")
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Signed-off-by: Zichen Xie <zichenxie0106@xxxxxxxxx>
---
v5: Add version tag.
v6: Adjust NULL check position for readability.
---
drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 5 +++++
drivers/net/wireless/mediatek/mt76/mt7925/mcu.c | 2 ++
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 2 ++
3 files changed, 9 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 87d0dd040001..4d53f819c5f1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -551,6 +551,8 @@ mt7915_mcu_bss_he_tlv(struct sk_buff *skb, struct ieee80211_vif *vif,
struct tlv *tlv;
cap = mt76_connac_get_he_phy_cap(phy->mt76, vif);
+ if (!cap)
+ return;
tlv = mt76_connac_mcu_add_tlv(skb, BSS_INFO_HE_BASIC, sizeof(*he));
@@ -1140,6 +1142,9 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
struct ieee80211_he_cap_elem *pe = &pc->he_cap_elem;
const struct ieee80211_sta_he_cap *vc =
mt76_connac_get_he_phy_cap(phy->mt76, vif);
+ if (!vc)
+ return;
+
const struct ieee80211_he_cap_elem *ve = &vc->he_cap_elem;
u16 mcs_map = le16_to_cpu(pc->he_mcs_nss_supp.rx_mcs_80);
u8 nss_mcs = mt7915_mcu_get_sta_nss(mcs_map);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 748ea6adbc6b..55e4cda2f20f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -2508,6 +2508,8 @@ mt7925_mcu_bss_he_tlv(struct sk_buff *skb, struct ieee80211_bss_conf *link_conf,
struct tlv *tlv;
cap = mt76_connac_get_he_phy_cap(phy->mt76, link_conf->vif);
+ if (!cap)
+ return;
tlv = mt76_connac_mcu_add_tlv(skb, UNI_BSS_INFO_HE_BASIC, sizeof(*he));
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 6c445a9dbc03..55bb2d0e67e5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -798,6 +798,8 @@ mt7996_mcu_bss_he_tlv(struct sk_buff *skb, struct ieee80211_vif *vif,
struct tlv *tlv;
cap = mt76_connac_get_he_phy_cap(phy->mt76, vif);
+ if (!cap)
+ return;
tlv = mt7996_mcu_add_uni_tlv(skb, UNI_BSS_INFO_HE_BASIC, sizeof(*he));
--
2.25.1
