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authorFelix Fietkau <nbd@nbd.name>2023-04-14 14:10:54 +0200
committerFelix Fietkau <nbd@nbd.name>2023-04-17 15:39:05 +0200
commit5b8ccdfb943f6a03c676d2ea816dd38c149e920b (patch)
tree09f857888b4b3ae9e2260fc22ddf009e6300e956 /drivers/net/wireless/mediatek
parent9e47dd9f64a47ae00ca0123017584c37209ee900 (diff)
wifi: mt76: add missing locking to protect against concurrent rx/status calls
According to the documentation, ieee80211_rx_list must not run concurrently with ieee80211_tx_status (or its variants). Cc: stable@vger.kernel.org Fixes: 88046b2c9f6d ("mt76: add support for reporting tx status with skb") Reported-by: Brian Coverstone <brian@mainsequence.net> Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek')
-rw-r--r--drivers/net/wireless/mediatek/mt76/dma.c2
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt7603/mac.c5
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt7615/mac.c5
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt76x02_mac.c5
-rw-r--r--drivers/net/wireless/mediatek/mt76/tx.c4
5 files changed, 18 insertions, 3 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 738d7e1569bf..6c0174313d09 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -578,7 +578,9 @@ free:
free_skb:
status.skb = tx_info.skb;
hw = mt76_tx_status_get_hw(dev, tx_info.skb);
+ spin_lock_bh(&dev->rx_lock);
ieee80211_tx_status_ext(hw, &status);
+ spin_unlock_bh(&dev->rx_lock);
return ret;
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index 70a7f84af028..12e0af52082a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -1279,8 +1279,11 @@ void mt7603_mac_add_txs(struct mt7603_dev *dev, void *data)
if (wcidx >= MT7603_WTBL_STA || !sta)
goto out;
- if (mt7603_fill_txs(dev, msta, &info, txs_data))
+ if (mt7603_fill_txs(dev, msta, &info, txs_data)) {
+ spin_lock_bh(&dev->mt76.rx_lock);
ieee80211_tx_status_noskb(mt76_hw(dev), sta, &info);
+ spin_unlock_bh(&dev->mt76.rx_lock);
+ }
out:
rcu_read_unlock();
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index 6d6b46d7bd1a..ce216bad3b73 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -1558,8 +1558,11 @@ static void mt7615_mac_add_txs(struct mt7615_dev *dev, void *data)
if (wcid->phy_idx && dev->mt76.phys[MT_BAND1])
mphy = dev->mt76.phys[MT_BAND1];
- if (mt7615_fill_txs(dev, msta, &info, txs_data))
+ if (mt7615_fill_txs(dev, msta, &info, txs_data)) {
+ spin_lock_bh(&dev->mt76.rx_lock);
ieee80211_tx_status_noskb(mphy->hw, sta, &info);
+ spin_unlock_bh(&dev->mt76.rx_lock);
+ }
out:
rcu_read_unlock();
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
index d3f74473e6fb..3e41d809ade3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
@@ -631,8 +631,11 @@ void mt76x02_send_tx_status(struct mt76x02_dev *dev,
mt76_tx_status_unlock(mdev, &list);
- if (!status.skb)
+ if (!status.skb) {
+ spin_lock_bh(&dev->mt76.rx_lock);
ieee80211_tx_status_ext(mt76_hw(dev), &status);
+ spin_unlock_bh(&dev->mt76.rx_lock);
+ }
if (!len)
goto out;
diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c
index 3ad9742364ba..72b3ec715e47 100644
--- a/drivers/net/wireless/mediatek/mt76/tx.c
+++ b/drivers/net/wireless/mediatek/mt76/tx.c
@@ -77,7 +77,9 @@ mt76_tx_status_unlock(struct mt76_dev *dev, struct sk_buff_head *list)
}
hw = mt76_tx_status_get_hw(dev, skb);
+ spin_lock_bh(&dev->rx_lock);
ieee80211_tx_status_ext(hw, &status);
+ spin_unlock_bh(&dev->rx_lock);
}
rcu_read_unlock();
}
@@ -263,7 +265,9 @@ void __mt76_tx_complete_skb(struct mt76_dev *dev, u16 wcid_idx, struct sk_buff *
if (cb->pktid < MT_PACKET_ID_FIRST) {
hw = mt76_tx_status_get_hw(dev, skb);
status.sta = wcid_to_sta(wcid);
+ spin_lock_bh(&dev->rx_lock);
ieee80211_tx_status_ext(hw, &status);
+ spin_unlock_bh(&dev->rx_lock);
goto out;
}