netdev - Re: [PATCH net 1/4] net/sched: act_gact: disallow 'goto chain' on fallback control action

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Message-ID: <CAM_iQpVMWvhQAXcL+cqeV8Ziae=xDG-NMEfjESY2MaoFgx_zqw@mail.gmail.com>
Date:   Mon, 22 Oct 2018 09:22:06 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Davide Caratti <dcaratti@...hat.com>
Cc:     Jiri Pirko <jiri@...nulli.us>, Jamal Hadi Salim <jhs@...atatu.com>,
        David Miller <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net 1/4] net/sched: act_gact: disallow 'goto chain' on
 fallback control action

On Sat, Oct 20, 2018 at 2:33 PM Davide Caratti <dcaratti@...hat.com> wrote:
>
> in the following command:
>
>  # tc action add action <c1> random <rand_type> <c2> <rand_param>
>
> 'goto chain x' is allowed only for c1: setting it for c2 makes the kernel
> crash with NULL pointer dereference, since TC core doesn't initialize the
> chain handle.
>
> Signed-off-by: Davide Caratti <dcaratti@...hat.com>

Acked-by: Cong Wang <xiyou.wangcong@...il.com>