Re: [PATCH net-next v2] net: WireGuard secure network tunnel

[Jason A. Donenfeld]

On Thu, Dec 19, 2019 at 11:42 AM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
> Well, unfortunately it does not test wireguard at the moment. I've
> enabled the config as I saw it appeared in linux-next:
> https://github.com/google/syzkaller/commit/240ba66ba8a0a99f27e1aac01f376331051a65c2
> but that's it for now.

I do see that in the linux-next and net-next instances you have
running, it's at least hitting interface creation and netlink.

> There are 3000 subsystems, are you ready to describe precise interface
> for all of them with all the necessary setup and prerequisites? Nobody
> can do it for all subsystems. Developer of a particular subsystem is
> the best candidate for also describing what it takes to test it ;)

Sure, I'd be happy to help get things rolling on WireGuard. What do
you need from me? A small shell script to set up a few interfaces that
are peered with each other? Sample packets to begin mutations from?
Since most of WireGuard's surface is behind constant-time/branchless
crypto, I doubt you'll fuzz your way to having valid key agreement,
which makes me think some sort of setup is necessary.