From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sat, 7 Dec 2019 23:18:52 +0000 (+0100)
Subject: cgroups/cgfsng: rework cgfsng_get_hierarchies()
X-Git-Tag: lxc-4.0.0~78^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa48a34fac85d825d4bbf116521e1176db1230f2;p=thirdparty%2Flxc.git

cgroups/cgfsng: rework cgfsng_get_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 f52d61dad..a3611c130 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -1978,24 +1978,27 @@ __cgfsng_ops static int cgfsng_num_hierarchies(struct cgroup_ops *ops)
 	return i;
 }
 
-__cgfsng_ops static bool cgfsng_get_hierarchies(struct cgroup_ops *ops, int n, char ***out)
+__cgfsng_ops static bool cgfsng_get_hierarchies(struct cgroup_ops *ops, int n,
+						char ***out)
 {
 	int i;
 
+	if (!ops)
+		return ret_set_errno(false, ENOENT);
+
 	if (!ops->hierarchies)
 		return false;
 
 	/* sanity check n */
 	for (i = 0; i < n; i++)
 		if (!ops->hierarchies[i])
-			return false;
+			return ret_set_errno(false, ENOENT);
 
 	*out = ops->hierarchies[i]->controllers;
 
 	return true;
 }
 
-
 static bool cg_legacy_freeze(struct cgroup_ops *ops)
 {
 	__do_free char *path = NULL;