From c4c99764f84a9b88317a94903d39718b2b467817 Mon Sep 17 00:00:00 2001
From: Berbe <4251220+Berbe@users.noreply.github.com>
Date: Sat, 29 Nov 2025 15:45:24 +0000
Subject: [PATCH 1/2] Add: cgroup2: Test Load

Signed-off-by: Berbe <4251220+Berbe@users.noreply.github.com>
---
 cgroup2/manager_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/cgroup2/manager_test.go b/cgroup2/manager_test.go
index 4902e576..bfcce9e4 100644
--- a/cgroup2/manager_test.go
+++ b/cgroup2/manager_test.go
@@ -466,3 +466,14 @@ func BenchmarkStat(b *testing.B) {
 func toPtr[T any](v T) *T {
 	return &v
 }
+
+func TestLoadOKWhenExistent(t *testing.T) {
+	checkCgroupMode(t)
+	group := "/existent"
+
+	_, err := NewManager(defaultCgroup2Path, group, &Resources{})
+	require.NoError(t, err)
+
+	_, err = Load(group)
+	require.NoError(t, err)
+}

From dbf9ebdbae06822ebff480cc5b1a2756c66076f3 Mon Sep 17 00:00:00 2001
From: Berbe <4251220+Berbe@users.noreply.github.com>
Date: Sat, 29 Nov 2025 15:01:21 +0000
Subject: [PATCH 2/2] Fix: cgroup2: Check cgroup existence on Load

Signed-off-by: Berbe <4251220+Berbe@users.noreply.github.com>
---
 cgroup2/manager.go      | 4 ++++
 cgroup2/manager_test.go | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/cgroup2/manager.go b/cgroup2/manager.go
index 3536fc97..8cf91349 100644
--- a/cgroup2/manager.go
+++ b/cgroup2/manager.go
@@ -224,6 +224,10 @@ func Load(group string, opts ...InitOpts) (*Manager, error) {
 		return nil, err
 	}
 	path := filepath.Join(c.mountpoint, group)
+	_, err := os.Stat(path)
+	if err != nil {
+		return nil, err
+	}
 	return &Manager{
 		unifiedMountpoint: c.mountpoint,
 		path:              path,
diff --git a/cgroup2/manager_test.go b/cgroup2/manager_test.go
index bfcce9e4..aa9a0615 100644
--- a/cgroup2/manager_test.go
+++ b/cgroup2/manager_test.go
@@ -19,6 +19,7 @@ package cgroup2
 import (
 	"context"
 	"fmt"
+	"io/fs"
 	"os"
 	"os/exec"
 	"syscall"
@@ -477,3 +478,11 @@ func TestLoadOKWhenExistent(t *testing.T) {
 	_, err = Load(group)
 	require.NoError(t, err)
 }
+
+func TestLoadErrorsWhenNonExistent(t *testing.T) {
+	checkCgroupMode(t)
+	group := "/nonexistent"
+
+	_, err := Load(group)
+	require.ErrorIs(t, err, fs.ErrNotExist)
+}