From 41f2f1273caee29ce9e2854c9aba996b56303b4a Mon Sep 17 00:00:00 2001 From: Jason Wang <jasowang@redhat.com> Date: Wed, 24 Dec 2014 11:03:52 +0800 Subject: [PATCH] virtio-net: don't do header check for dodgy gso packets There's no need to do header check for virtio-net since: - Host sets dodgy for all gso packets from guest and check the header. - Host should be prepared for all kinds of evil packets from guest, since malicious guest can send any kinds of packet. So this patch sets NETIF_F_GSO_ROBUST for virtio-net to skip the check. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michael S. Tsirkin <mst@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/virtio_net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 5ca97713bfb33..11e2e8131359c 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1759,6 +1759,8 @@ static int virtnet_probe(struct virtio_device *vdev) if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) dev->hw_features |= NETIF_F_TSO_ECN; + dev->features |= NETIF_F_GSO_ROBUST; + if (gso) dev->features |= dev->hw_features & NETIF_F_ALL_TSO; /* (!csum && gso) case will be fixed by register_netdev() */ -- 2.30.2