Re: [iptables PATCH 14/23] ebtables: Fix segfault when parsing a rule

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On Fri, Jul 27, 2018 at 12:53:22PM +0200, Phil Sutter wrote:
> Hi,
> 
> On Fri, Jul 27, 2018 at 11:45:16AM +0200, Pablo Neira Ayuso wrote:
> > On Fri, Jul 27, 2018 at 12:22:33AM +0200, Phil Sutter wrote:
> > > This should happen in ebtables-restore only: If a previous rule
> > > contained a standard target, the standard target object is inserted into
> > > xtables_targets. Though since that doesn't have a 'parse' callback, the
> > > code segfaults. Therefore make the code ignore that special object
> > > (which is not an issue since standard targets don't support parameters).
> > 
> > Hm, I see.
> > 
> > How can this the standard target get into this list?
> 
> IIRC, the code flow is like this:
> 
> -> do_commandeb() encounters '-j' parameter
>   -> command_jump()
>     -> xtables_find_target()
>       -> xtables_fully_register_pending_target()

I see, but what is the rule that loads the standard target or it is
already there?

Asking this because we don't seem to need this in the
iptables/xtables.c parser.
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