From: Willem de Bruijn <willemdebruijn.ker...@gmail.com>
Date: Mon, 18 Feb 2019 23:37:12 -0500
> From: Willem de Bruijn <will...@google.com>
>
> GSO packets with vnet_hdr must conform to a small set of gso_types.
> The below commit uses flow dissection to drop packets that do not.
>
> But it has false positives when the skb is not fully initialized.
> Dissection needs skb->protocol and skb->network_header.
>
> Infer skb->protocol from gso_type as the two must agree.
> SKB_GSO_UDP can use both ipv4 and ipv6, so try both.
>
> Exclude callers for which network header offset is not known.
>
> Fixes: d5be7f632bad ("net: validate untrusted gso packets without csum
> offload")
> Signed-off-by: Willem de Bruijn <will...@google.com>
Applied and queued up for -stable, thanks.
