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Message-Id: <20210712061019.174305633@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:08:32 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Lorenzo Bianconi <lorenzo@...nel.org>,
Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 489/800] mt76: fix possible NULL pointer dereference in mt76_tx
From: Lorenzo Bianconi <lorenzo@...nel.org>
[ Upstream commit d7400a2f3e295b8cee692c7a66e10f60015a3c37 ]
Even if this is not a real issue since mt76_tx is never run with wcid set
to NULL, fix a theoretical NULL pointer dereference in mt76_tx routine
Fixes: db9f11d3433f7 ("mt76: store wcid tx rate info in one u32 reduce locking")
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/net/wireless/mediatek/mt76/tx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c
index 53ea8de82df0..441d06e30b1a 100644
--- a/drivers/net/wireless/mediatek/mt76/tx.c
+++ b/drivers/net/wireless/mediatek/mt76/tx.c
@@ -285,7 +285,7 @@ mt76_tx(struct mt76_phy *phy, struct ieee80211_sta *sta,
skb_set_queue_mapping(skb, qid);
}
- if (!(wcid->tx_info & MT_WCID_TX_INFO_SET))
+ if (wcid && !(wcid->tx_info & MT_WCID_TX_INFO_SET))
ieee80211_get_tx_rates(info->control.vif, sta, skb,
info->control.rates, 1);
--
2.30.2
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