netdev - Re: [net v3 0/2] net/tls: fix encryption error path

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Date:   Thu, 21 May 2020 12:29:22 -0400
From:   Pooja Trivedi <poojatrivedi@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Vadim Fedorenko <vfedorenko@...ek.ru>,
        Boris Pismenny <borisp@...lanox.com>,
        Aviad Yehezkel <aviadye@...lanox.com>,
        John Fastabend <john.fastabend@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [net v3 0/2] net/tls: fix encryption error path

On Wed, May 20, 2020 at 4:46 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 20 May 2020 11:41:42 +0300 Vadim Fedorenko wrote:
> > The problem with data stream corruption was found in KTLS
> > transmit path with small socket send buffers and large
> > amount of data. bpf_exec_tx_verdict() frees open record
> > on any type of error including EAGAIN, ENOMEM and ENOSPC
> > while callers are able to recover this transient errors.
> > Also wrong error code was returned to user space in that
> > case. This patchset fixes the problems.
>
> Thanks:
>
> Acked-by: Jakub Kicinski <kuba@...nel.org>
>
> Pooja, I think Vadim's fix to check the socket error will make changes
> to handling of -EAGAIN unnecessary, right?

Correct, yes.

> Still would be good to get
> that selftest, triggering EAGAIN should be quite simple.

Agree.