# Re: \[PATCH net-next v3 4/8\] udp: never accept GSO\_FRAGLIST packets

- From: Willem de Bruijn \<willemdebruijn.kernel@gmail.com\>
- Date: 2021-03-30 15:15:40 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/03/11200252
- Thread: https://ratatoskr.run/netdev/2021/03/11200217/t.md

```text
On Tue, Mar 30, 2021 at 6:30 AM Paolo Abeni [ref] wrote:
>
> Currently the UDP protocol delivers GSO_FRAGLIST packets to
> the sockets without the expected segmentation.
>
> This change addresses the issue introducing and maintaining
> a couple of new fields to explicitly accept SKB_GSO_UDP_L4
> or GSO_FRAGLIST packets. Additionally updates  udp_unexpected_gso()
> accordingly.
>
> UDP sockets enabling UDP_GRO stil keep accept_udp_fraglist
> zeroed.
>
> v1 -> v2:
>  - use 2 bits instead of a whole GSO bitmask (Willem)
>
> Fixes: 9fd1ff5d2ac7 ("udp: Support UDP fraglist GRO/GSO.")
> Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>
```