Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=linux-6.5.y 2021-12-10T14:38:26+00:00 2021-12-10T14:38:26+00:00 Eric Dumazet edumazet@google.com 2021-12-10T07:44:21+00:00 urn:sha1:9ba74e6c9e9d0c5c1e5792a7111fc7d1a0589cb8 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. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>