Re: [PATCH net-next 00/17] net: netns refcount tracking series

On Mon,  6 Dec 2021 16:51:25 -0800 Eric Dumazet wrote:

We have 100+ syzbot reports about netns being dismantled too soon,
still unresolved as of today.

We think a missing get_net() or an extra put_net() is the root cause.

In order to find the bug(s), and be able to spot future ones,
this patch adds CONFIG_NET_NS_REFCNT_TRACKER and new helpers
to precisely pair all put_net() with corresponding get_net().

To use these helpers, each data structure owning a refcount
should also use a "netns_tracker" to pair the get() and put().

Small sections of codes where the get()/put() are in sight
do not need to have a tracker, because they are short lived,
but in theory it is also possible to declare an on-stack tracker.

Ugh, I realized after a week of waiting that vfs / sunrpc / audit folks
are not even CCed here. I think we should give them the courtesy of
being able to ack the patches.. Can you split out 1-4,6,7 for immediate
merging and repost the rest with the right CCs?