netdev - Re: [PATCH net] cls_flower: fix use after free in flower S/W path

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Message-ID: <CAM_iQpVMrTHYHE+DXDGyqXzsOnM624yaX4ddyd=C9zpB9wAjzg@mail.gmail.com>
Date:   Wed, 20 Jun 2018 11:06:15 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Paul Blakey <paulb@...lanox.com>
Subject: Re: [PATCH net] cls_flower: fix use after free in flower S/W path

On Wed, Jun 20, 2018 at 10:34 AM, Paolo Abeni <pabeni@...hat.com> wrote:
>
> +static void fl_mask_free(struct fl_flow_mask *mask)
> +{
> +       rhashtable_destroy(&mask->ht);

I don't believe you can call rhashtable_destroy() in BH
context, it acquires a mutex...