Re: [PATCH net-next v4] selftests: net: add tests for PPP

Qingfang Deng <[email protected]> Thu, 26 Mar 2026 16:26:23 +0800

Newsgroups	org.kernel.vger.linux-ppp,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.netdev
Message-ID	<CALW65jYdzn_rZWa2zwYd5J+Gd=kyaGMsVFyX0fMJfKfgULMO6w@mail.gmail.com>

Hi Sebastian,

On Thu, Mar 26, 2026 at 4:13 PM Sebastian Andrzej Siewior
<[email protected]> wrote:
>
> On 2026-03-26 10:16:24 [+0800], Qingfang Deng wrote:
> > Add ping and iperf3 tests for ppp_async.c and pppoe.c.
>
> Oh thank you for doing this.
> I haven't look in detail but this cover the "invalid loop" cases that
> ppp tries to catch?

By "invalid loop", do you mean transmit recursion?
https://lore.kernel.org/all/[email protected]/

AFAIK, this can only happen with PPTP or L2TP, which were not included
in this patch.

Add Cc: Guillaume Nault

Regards,
Qingfang