On 5/4/17 11:36 AM, Cong Wang wrote: > For each netns (except init_net), we initialize its null entry > in 3 places: > > 1) The template itself, as we use kmemdup() > 2) Code around dst_init_metrics() in ip6_route_net_init() > 3) ip6_route_dev_notify(), which is supposed to initialize it after > loopback registers > > Unfortunately the last one still happens in a wrong order because > we expect to initialize net->ipv6.ip6_null_entry->rt6i_idev to > net->loopback_dev's idev, so we have to do that after we add > idev to it. However, this notifier has priority == 0 same as > ipv6_dev_notf, and ipv6_dev_notf is registered after > ip6_route_dev_notifier so it is called actually after > ip6_route_dev_notifier. > > Fix it by picking a smaller priority for ip6_route_dev_notifier. > Also, we have to release the refcnt accordingly when unregistering > loopback_dev because device exit functions are called before subsys > exit functions. > > Cc: David Ahern <dsah...@gmail.com> > Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com> > ---
Commit message needs a tie in to the problem that Andrey reported. It solves the same problem for namespaces other than init_net. Acked-by: David Ahern <dsah...@gmail.com> Tested-by: David Ahern <dsah...@gmail.com>
