From: Yang Yingliang yangyingliang@huawei.com
Add skcd->no_refcnt check which is missed when backporting ad0f75e5f57c ("cgroup: fix cgroup_sk_alloc() for sk_clone_lock()").
This patch is needed in stable-4.9, stable-4.14 and stable-4.19.
Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/cgroup/cgroup.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index a2fed8fbd2bde..ada060e628ce3 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5827,6 +5827,8 @@ void cgroup_sk_clone(struct sock_cgroup_data *skcd) { /* Socket clone path */ if (skcd->val) { + if (skcd->no_refcnt) + return; /* * We might be cloning a socket which is left in an empty * cgroup and the cgroup might have already been rmdir'd.