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virtio-net: drop NETIF_F_FRAGLIST
virtio declares support for NETIF_F_FRAGLIST, but assumes that there are at most MAX_SKB_FRAGS + 2 fragments which isn't always true with a fraglist. A longer fraglist in the skb will make the call to skb_to_sgvec overflow the sg array, leading to memory corruption. Drop NETIF_F_FRAGLIST so we only get what we can handle. Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 2 additions and 2 deletions
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@ -1756,9 +1756,9 @@ static int virtnet_probe(struct virtio_device *vdev)
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/* Do we support "hardware" checksums? */
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if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) {
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/* This opens up the world of extra features. */
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dev->hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
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dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_SG;
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if (csum)
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dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
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dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG;
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if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
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dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO
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