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wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_tx_check_aggr()

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Move the NULL check for 'sta' before dereferencing it to prevent a
possible crash.

Fixes: 44eb173bdd ("wifi: mt76: mt7925: add link handling in mt7925_txwi_free")
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250904030649.655436-4-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Ming Yen Hsieh 2025-09-04 11:06:48 +08:00 committed by Felix Fietkau
parent 3416394219
commit 83ae3a18ba
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/mediatek/mt76/mt7925/mac.c
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@ -846,11 +846,14 @@ static void mt7925_tx_check_aggr(struct ieee80211_sta *sta, struct sk_buff *skb,
bool is_8023;
u16 fc, tid;
if (!sta)
return;
link_sta = rcu_dereference(sta->link[wcid->link_id]);
if (!link_sta)
return;
if (!sta || !(link_sta->ht_cap.ht_supported || link_sta->he_cap.has_he))
if (!(link_sta->ht_cap.ht_supported || link_sta->he_cap.has_he))
return;
tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;