cgroup: add missing skcd->no_refcnt check in cgroup_sk_clone()
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>
BUG=b/166429001
TEST=tryjob
SOURCE=UPSTREAM(38de4308c5c3)
RELEASE_NOTE=None
Change-Id: Ia33c0beb2bdb857da06c54d8928c707e83427706
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/7424
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 6ae98c7..2a879d3 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5957,6 +5957,8 @@
{
/* 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.
