netdev - Re: [PATCH net v3] net/tls: sendfile fails with ktls offload

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Message-ID: <20201007132440.38f5f645@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 7 Oct 2020 13:24:40 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Rohit Maheshwari <rohitm@...lsio.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, secdev@...lsio.com
Subject: Re: [PATCH net v3] net/tls: sendfile fails with ktls offload

On Thu,  8 Oct 2020 00:10:21 +0530 Rohit Maheshwari wrote:
> At first when sendpage gets called, if there is more data, 'more' in
> tls_push_data() gets set which later sets pending_open_record_frags, but
> when there is no more data in file left, and last time tls_push_data()
> gets called, pending_open_record_frags doesn't get reset. And later when
> 2 bytes of encrypted alert comes as sendmsg, it first checks for
> pending_open_record_frags, and since this is set, it creates a record with
> 0 data bytes to encrypt, meaning record length is prepend_size + tag_size
> only, which causes problem.
>  We should set/reset pending_open_record_frags based on more bit.
> 
> Fixes: d829e9c4112b ("tls: convert to generic sk_msg interface")
> Signed-off-by: Rohit Maheshwari <rohitm@...lsio.com>

Signed-off-by: Jakub Kicinski <kuba@...nel.org>