diff options
author | Jason Wang <jasowang@redhat.com> | 2015-08-05 10:34:04 +0800 |
---|---|---|
committer | Ben Hutchings <ben@decadent.org.uk> | 2015-10-13 03:46:11 +0100 |
commit | e4afe1f118e136464da2faeb18c6c9a791ce25bc (patch) | |
tree | 11ed555d226c4abed95fb9a1b8cefcbbbfd8607c | |
parent | 1c825dacb615430cb384e0e3be07700013291742 (diff) |
virtio-net: drop NETIF_F_FRAGLIST
commit 48900cb6af4282fa0fb6ff4d72a81aa3dadb5c39 upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
-rw-r--r-- | drivers/net/virtio_net.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index f13a6734dcbc..715e5c4200fc 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -981,9 +981,9 @@ static int virtnet_probe(struct virtio_device *vdev) /* Do we support "hardware" checksums? */ if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { /* This opens up the world of extra features. */ - dev->hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; + dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_SG; if (csum) - dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; + dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG; if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO |