netdev - RE: [PATCH net 2/8] net/tls: free the record on encryption error

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Date:   Wed, 27 Nov 2019 20:41:06 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>, davem@...emloft.net,
        john.fastabend@...il.com
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        borisp@...lanox.com, aviadye@...lanox.com, daniel@...earbox.net,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        syzbot+df0d4ec12332661dd1f9@...kaller.appspotmail.com,
        Simon Horman <simon.horman@...ronome.com>
Subject: RE: [PATCH net 2/8] net/tls: free the record on encryption error

Jakub Kicinski wrote:
> When tls_do_encryption() fails the SG lists are left with the
> SG_END and SG_CHAIN marks in place. One could hope that once
> encryption fails we will never see the record again, but that
> is in fact not true. Commit d3b18ad31f93 ("tls: add bpf support
> to sk_msg handling") added special handling to ENOMEM and ENOSPC
> errors which mean we may see the same record re-submitted.
> 
> As suggested by John free the record, the BPF code is already
> doing just that.
> 
> Reported-by: syzbot+df0d4ec12332661dd1f9@...kaller.appspotmail.com
> Fixes: d3b18ad31f93 ("tls: add bpf support to sk_msg handling")
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Reviewed-by: Simon Horman <simon.horman@...ronome.com>
> ---
>  net/tls/tls_sw.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)


Acked-by: John Fastabend <john.fastabend@...il.com>