The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 5b8ccdfb943f6a03c676d2ea816dd38c149e920b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023050659-drinkable-babied-438b@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 5b8ccdfb943f6a03c676d2ea816dd38c149e920b Mon Sep 17 00:00:00 2001 From: Felix Fietkau nbd@nbd.name Date: Fri, 14 Apr 2023 14:10:54 +0200 Subject: [PATCH] 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
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 @@ mt76_dma_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, 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; }