From 8b1c80cc5a07c881ffa66487edc9b7f81d48f448 Mon Sep 17 00:00:00 2001
From: Kir Kolyshkin <kolyshkin@gmail.com>
Date: Sun, 12 Apr 2020 18:19:48 -0700
Subject: [PATCH] cgroupv2: fix systemd driver not putting pid into cgroup

Fixes: #2310

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
---
 libcontainer/cgroups/systemd/unified_hierarchy.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libcontainer/cgroups/systemd/unified_hierarchy.go b/libcontainer/cgroups/systemd/unified_hierarchy.go
index 2dffc34e076..5487a9780b7 100644
--- a/libcontainer/cgroups/systemd/unified_hierarchy.go
+++ b/libcontainer/cgroups/systemd/unified_hierarchy.go
@@ -151,6 +151,9 @@ func (m *UnifiedManager) Apply(pid int) error {
 	if err := createCgroupsv2Path(path); err != nil {
 		return err
 	}
+	if err := cgroups.WriteCgroupProc(path, pid); err != nil {
+		return err
+	}
 	m.Paths = map[string]string{
 		"pids":    path,
 		"memory":  path,