netdev - Re: [PATCH net resend] virtio_net: reject XDP programs using header adjustment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 26 Jan 2017 10:57:54 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        netdev@...r.kernel.org, john.fastabend@...il.com,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        John Fastabend <john.r.fastabend@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        oss-drivers@...ronome.com
Subject: Re: [PATCH net resend] virtio_net: reject XDP programs using header
 adjustment



On 2017年01月26日 06:56, Jakub Kicinski wrote:
> commit 17bedab27231 ("bpf: xdp: Allow head adjustment in XDP prog")
> added a new XDP helper to prepend and remove data from a frame.
> Make virtio_net reject programs making use of this helper until
> proper support is added.
>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Acked-by: John Fastabend <john.r.fastabend@...el.com>
> ---
>   drivers/net/virtio_net.c | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index f9bf94887ff1..a2aac4fd8e42 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1710,6 +1710,11 @@ static int virtnet_xdp_set(struct net_device *dev, struct bpf_prog *prog)
>   	u16 xdp_qp = 0, curr_qp;
>   	int i, err;
>   
> +	if (prog && prog->xdp_adjust_head) {
> +		netdev_warn(dev, "Does not support bpf_xdp_adjust_head()\n");
> +		return -EOPNOTSUPP;
> +	}
> +
>   	if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_TSO4) ||
>   	    virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_TSO6) ||
>   	    virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_ECN) ||

Acked-by: Jason Wang <jasowang@...hat.com>