On Thu, 12 Jan 2017 15:22:49 +0100
Phil Sutter <p...@nwl.cc> wrote:

> Said iptables version introduced struct xtables_globals field
> 'compat_rev', a function pointer. Initializing it is mandatory as
> libxtables calls it without existence check.
> 
> Without this, tc segfaults when using the xt action like so:
> 
> | tc filter add dev d0 parent ffff: u32 match u32 0 0 \
> |     action xt -j MARK --set-mark 20
> 
> Signed-off-by: Phil Sutter <p...@nwl.cc>
> ---
>  tc/m_xt.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tc/m_xt.c b/tc/m_xt.c
> index dbb54981462ee..57ed40d7aa3a8 100644
> --- a/tc/m_xt.c
> +++ b/tc/m_xt.c
> @@ -77,6 +77,9 @@ static struct xtables_globals tcipt_globals = {
>       .orig_opts = original_opts,
>       .opts = original_opts,
>       .exit_err = NULL,
> +#if (XTABLES_VERSION_CODE >= 11)
> +     .compat_rev = xtables_compatible_revision,
> +#endif
>  };
>  
>  /*

Ah the xtables API is not really an application friendly API by
any stretch of the imagination

Parenthesis not really necessary there.

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