[PATCH net 1/2] virtio_net: check AF_XDP queue index before use

Validate the AF_XDP queue index before dereferencing the receive or
send queue arrays in virtnet_xsk_pool_enable().  This keeps an out of
range queue id from reaching vi->rq[qid] while checking page_pool.

Signed-off-by: Xiong Weimin <[email protected]>
---
 drivers/net/virtio_net.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3e2a5876c..6160aa8ba 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -5896,15 +5896,15 @@ static int virtnet_xsk_pool_enable(struct net_device *dev,
 	if (vi->hdr_len > xsk_pool_get_headroom(pool))
 		return -EINVAL;
 
+	if (qid >= vi->curr_queue_pairs)
+		return -EINVAL;
+
 	/* In big_packets mode, xdp cannot work, so there is no need to
 	 * initialize xsk of rq.
 	 */
 	if (!vi->rq[qid].page_pool)
 		return -ENOENT;
 
-	if (qid >= vi->curr_queue_pairs)
-		return -EINVAL;
-
 	sq = &vi->sq[qid];
 	rq = &vi->rq[qid];
 
-- 
2.43.0