From: Ryder Lee Date: Sat, 3 Dec 2022 03:22:23 +0000 (+0800) Subject: wifi: mt76: mt7996: fix insecure data handling of mt7996_mcu_ie_countdown() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5202b983f9894d31110e49c4ec6b57955b5eaa1a;p=linux.git wifi: mt76: mt7996: fix insecure data handling of mt7996_mcu_ie_countdown() Coverity message: using tainted "hdr->band" variable as an index into an array "(*dev).mt76.phys". Reported-by: coverity-bot Addresses-Coverity-ID: 1527797 ("Insecure data handling") Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Signed-off-by: Ryder Lee Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c index 04e1d10bbd21e..a90b7ca2df63c 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c @@ -412,6 +412,9 @@ mt7996_mcu_ie_countdown(struct mt7996_dev *dev, struct sk_buff *skb) struct header *hdr = (struct header *)data; struct tlv *tlv = (struct tlv *)(data + 4); + if (hdr->band >= ARRAY_SIZE(dev->mt76.phys)) + return; + if (hdr->band && dev->mt76.phys[hdr->band]) mphy = dev->mt76.phys[hdr->band];