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mt76: usb: check urb->num_sgs limit in mt76u_process_rx_entry

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check nsgs value is less than urb->num_sgs in mt76u_process_rx_entry
in order to avoid an out-of-bound access of urb->sg array

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2019-02-20 10:20:37 +01:00 • committed by Felix Fietkau
commit 200abe6a96
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/mediatek/mt76/usb.c
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@ -468,7 +468,7 @@ mt76u_process_rx_entry(struct mt76_dev *dev, struct mt76u_buf *buf)
__skb_put(skb, data_len);
len -= data_len;
while (len > 0 && urb->num_sgs) {
while (len > 0 && nsgs < urb->num_sgs) {
data_len = min_t(int, len, urb->sg[nsgs].length);
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
sg_page(&urb->sg[nsgs]),