linux-kernel - Re: [PATCH v2 net] tcp: md5: incorrect tcp_header

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Date:   Wed, 20 Apr 2022 19:00:01 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Francesco Ruggeri <fruggeri@...sta.com>
Cc:     Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        David Ahern <dsahern@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Miller <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net] tcp: md5: incorrect tcp_header_len for incoming connections

On Wed, Apr 20, 2022 at 5:50 PM Francesco Ruggeri <fruggeri@...sta.com> wrote:
>
> In tcp_create_openreq_child we adjust tcp_header_len for md5 using the
> remote address in newsk. But that address is still 0 in newsk at this
> point, and it is only set later by the callers (tcp_v[46]_syn_recv_sock).
> Use the address from the request socket instead.
>
>
>
> Fixes: cfb6eeb4c860 ("[TCP]: MD5 Signature Option (RFC2385) support.")
> Signed-off-by: Francesco Ruggeri <fruggeri@...sta.com>

Thanks for fixing this Francesco.

Reviewed-by: Eric Dumazet <edumazet@...gle.com>