Commit 200abe6a authored Feb 20, 2019 by Lorenzo Bianconi Committed by Felix Fietkau Feb 26, 2019

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



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>

parent 04eb16fc

drivers/net/wireless/mediatek/mt76/usb.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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]),