From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 12 Feb 2022 06:32:48 +0000 (+0900)
Subject: cgroup-util: refuse the case that both path and suffix are empty strings
X-Git-Tag: v251-rc1~305
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=74c60fcbec9544b73e701158f80fea03282cd20d;p=thirdparty%2Fsystemd.git

cgroup-util: refuse the case that both path and suffix are empty strings

Fixes CID#1322378.
---

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 1890cb09ff4..289e4fe073a 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -533,7 +533,7 @@ int cg_get_path(const char *controller, const char *path, const char *suffix, ch
                 /* If no controller is specified, we return the path *below* the controllers, without any
                  * prefix. */
 
-                if (!path && !suffix)
+                if (isempty(path) && isempty(suffix))
                         return -EINVAL;
 
                 if (isempty(suffix))