netdev - Re: [PATCH net] tcp: ulp: fix possible crash in tcp_diag_get_aux

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Message-ID: <CANn89iLqqe9U+vzwVv6afDjf_qXNbSF+wQr+pAjBvqXajAsSqA@mail.gmail.com>
Date:   Thu, 5 Sep 2019 22:21:49 +0200
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Luke Hsiao <lukehsiao@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Davide Caratti <dcaratti@...hat.com>
Subject: Re: [PATCH net] tcp: ulp: fix possible crash in tcp_diag_get_aux_size()

On Thu, Sep 5, 2019 at 10:20 PM Eric Dumazet <edumazet@...gle.com> wrote:
>
> tcp_diag_get_aux_size() can be called with sockets in any state.
>
> icsk_ulp_ops is only present for full sockets.
>
> For SYN_RECV or TIME_WAIT ones we would access garbage.
>
> Fixes: 61723b393292 ("tcp: ulp: add functions to dump ulp-specific information")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: Luke Hsiao <lukehsiao@...gle.com>
> Reported-by: Neal Cardwell <ncardwell@...gle.com>
> Cc: Davide Caratti <dcaratti@...hat.com>
> ---

Sorry for the 'net' tag. This patch targets net-next tree only.