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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: 44eb173bdd4f ("wifi: mt76: mt7925: add link handling in mt7925_txwi_free")
Signed-off-by: Ming Yen Hsieh <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Ming Yen Hsieh
2025-09-09 07:19:41 +02:00
committed by Felix Fietkau
parent d48b221e39
commit 719cda7c9f
1 changed files with 4 additions and 1 deletions
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mt7925/mac.c
+4 -1
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@@ -844,11 +844,14 @@ 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;