From 645ef433009929f569c786127963f011c001bd50 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Wed, 20 Feb 2019 10:20:37 +0100 Subject: [PATCH] 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 --- usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/usb.c b/usb.c index b587f0c3..ae6ada37 100644 --- a/usb.c +++ b/usb.c @@ -467,7 +467,7 @@ 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]),