Re: [PATCH net-next] tuntap: add sanity checks about msg_controllen in sendmsg

Harold Huang
2022-03-02T03:37:48Z

On Wed, Mar 2, 2022 at 10:05 AM Jakub Kicinski <kuba@kernel.org> wrote:
>
> On Tue, 1 Mar 2022 14:43:14 +0800 Harold Huang wrote:
> > In patch [1], tun_msg_ctl was added to allow pass batched xdp buffers to
> > tun_sendmsg. Although we donot use msg_controllen in this path, we should
> > check msg_controllen to make sure the caller pass a valid msg_ctl.
> >
> > [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fe8dd45bb7556246c6b76277b1ba4296c91c2505
> >
> > Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
> > Suggested-by: Jason Wang <jasowang@redhat.com>
> > Signed-off-by: Harold Huang <baymaxhuang@gmail.com>
>
> Would you mind resending the same patch? It looks like it depended on
> your other change so the build bot was unable to apply and test it.

Yes, it depends on this patch [1] which has been applied to netdev. I
see this patch could be applied to netdev by git am. But if I use
another patch that could be applied to linux master, it could not be
applied to netdev anymore.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=fb3f903769e8