From: David Ahern <dsah...@gmail.com> Date: Thu, 4 May 2017 13:41:15 -0600
> 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. Cong, please update the commit message as David is requesting. Thanks.
