if_ovpn: fix memory leak on unload
When we're unloading the if_ovpn module we sometimes end up only freeing the softc after the module is unloaded and the M_OVPN malloc type no longer exists. Don't return from ovpn_clone_destroy() until the epoch callbacks have been called, which ensures that we've freed the softc before we destroy M_OVPN. Sponsored by: Rubicon Communications, LLC ("Netgate")
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@ -2421,6 +2421,8 @@ ovpn_clone_destroy(struct if_clone *ifc, struct ifnet *ifp)
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if (unit != IF_DUNIT_NONE)
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ifc_free_unit(ifc, unit);
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NET_EPOCH_DRAIN_CALLBACKS();
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return (0);
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}
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