From 4af918d51e8cca1da7780b1fe7419f22077fb9fe Mon Sep 17 00:00:00 2001
From: Deng Guangxing <dengguangxing@huawei.com>
Date: Wed, 6 Sep 2017 15:04:47 +0800
Subject: [PATCH] runc: update state eariler to avoid cgroup leak when process
 failed

if process stuck in somewhere. upper caller like containerd may
have a timeout for process launching.

process will be killed after this timeout, and then call `runc
delete` to retrieve its resource like cgroup and perform poststop
hook.

if process got stuck right before updating state, and after cgroup
applied, like prestart-hook. In such case, `runc delete xxx` will
do nothing because state file is missing, runc is not aware of this
container. so process cgroup will stay and never get removed.

This patch perform state updating right after cgroup applying. so
`runc delete` will do the cleaning job

Change-Id: I7b247f501986e712a86da3958d1be573af4e84a6
Signed-off-by: Deng Guangxing <dengguangxing@huawei.com>

---
 libcontainer/process_linux.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcontainer/process_linux.go b/libcontainer/process_linux.go
index 446649a..29408d7 100644
--- a/libcontainer/process_linux.go
+++ b/libcontainer/process_linux.go
@@ -411,6 +411,11 @@ func (p *initProcess) start() (retErr error) {
 	if err := p.manager.Apply(p.pid()); err != nil {
 		return fmt.Errorf("unable to apply cgroup configuration: %w", err)
 	}
+	// update state here, so we can retrieve process resource
+	// even it get killed by accident
+	if _, err := p.container.updateState(p); err != nil {
+		return err
+	}
 	if p.intelRdtManager != nil {
 		if err := p.intelRdtManager.Apply(p.pid()); err != nil {
 			return fmt.Errorf("unable to apply Intel RDT configuration: %w", err)
-- 
2.33.0

