Cong Wang <xiyou.wangc...@gmail.com> wrote: > On Thu, Jun 1, 2017 at 1:52 AM, Florian Westphal <f...@strlen.de> 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?
That would work as well. I'm not sure its nice to disallow rmmod of helper modules if they are used by a connection however. Right now you can "rmmod nf_conntrack_foo" at any time and this should work just fine without first having to flush affected conntracks manually.
