From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sat, 7 Dec 2019 23:17:58 +0000 (+0100)
Subject: cgroups/cgfsng: rework cgfsng_num_hierarchies()
X-Git-Tag: lxc-4.0.0~78^2~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3ffb28bd03b6ed491367f81fbf1e7889fb3e5b0;p=thirdparty%2Flxc.git

cgroups/cgfsng: rework cgfsng_num_hierarchies()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 932425e81..f52d61dad 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -1966,6 +1966,9 @@ __cgfsng_ops static int cgfsng_num_hierarchies(struct cgroup_ops *ops)
 {
 	int i = 0;
 
+	if (!ops)
+		return ret_set_errno(-1, ENOENT);
+
 	if (!ops->hierarchies)
 		return 0;