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mt76: add sanity check for a-mpdu rx wcid index

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Avoid dereferencing invalid ids

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2019-10-10 21:59:46 +02:00
parent 237312c5e4
commit bf5238b25a
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/mediatek/mt76/mac80211.c
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@ -644,7 +644,7 @@ mt76_airtime_flush_ampdu(struct mt76_dev *dev)
return;
wcid_idx = dev->rx_ampdu_status.wcid_idx;
if (dev->rx_ampdu_status.wcid_idx != 0xff)
if (wcid_idx < ARRAY_SIZE(dev->wcid))
wcid = rcu_dereference(dev->wcid[wcid_idx]);
else
wcid = NULL;