Re: [PATCH nf-next] netns: add and use net_ns_barrier

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On Thu, Jun 1, 2017 at 1:52 AM, Florian Westphal <fw@xxxxxxxxx> wrote:
> Joe described it nicely, problem is that after unload we may have
> conntracks that still have a nf_conn_help extension attached that
> has a pointer to a structure that resided in the (unloaded) module.

Why not hold a refcnt for its module?
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