From: Lorenzo Bianconi Date: Wed, 20 Feb 2019 09:20:37 +0000 (+0100) Subject: mt76: usb: check urb->num_sgs limit in mt76u_process_rx_entry X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=200abe6a963a8720397f7156403ff14d09457704;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index 096bc99378f5..ac3da948d43a 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -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]),