diff -uprN a/bindings.c b/bindings.c
--- a/bindings.c	2019-01-07 16:16:48.039448823 +0800
+++ b/bindings.c	2019-01-07 16:34:25.904397244 +0800
@@ -3128,9 +3128,10 @@ static unsigned long get_memlimit(const
 	char *memlimit_str = NULL;
 	unsigned long memlimit = 0;
 
-	if ((memlimit_str = cgfs_get_value("memory", cgroup, file)))
-		memlimit = strtoul(memlimit_str, NULL, 10);
+	if (!(memlimit_str = cgfs_get_value("memory", cgroup, file)))
+		return memlimit;
 
+	memlimit = strtoul(memlimit_str, NULL, 10);
 	free(memlimit_str);
 	memlimit_str = NULL;
 
@@ -3375,9 +3376,10 @@ static long get_cpulimit(const char *cgr
         char *cpulimit_str = NULL;
         long cpulimit = -1;
 
-        if (cgfs_get_value("cpu", cgroup, file, &cpulimit_str))
-                cpulimit = strtol(cpulimit_str, NULL, 10);
+        if (!cgfs_get_value("cpu", cgroup, file, &cpulimit_str))
+		return cpulimit;
 
+        cpulimit = strtol(cpulimit_str, NULL, 10);
         free(cpulimit_str);
 
         return cpulimit;
@@ -3385,12 +3387,13 @@ static long get_cpulimit(const char *cgr
 
 static long get_cpu_count(const char *cgroup)
 {
-	char *copy = strdupa(cgroup);
+	char *copy = must_copy_string(cgroup);
 	long double count = -1;
 	int period, quota;
 
 	period = get_cpulimit(copy, "cpu.cfs_period_us");
 	quota = get_cpulimit(copy, "cpu.cfs_quota_us");
+	free(copy);
 
 	if (quota != -1)
 		count = quota / period;
@@ -3607,6 +3610,8 @@ err:
 	cpuset = NULL;
 	free(cg);
 	cg = NULL;
+	free(ccg);
+	ccg = NULL;
 	return rv;
 }
 
@@ -3922,6 +3927,8 @@ err:
 	cpuset = NULL;
 	free(cg);
 	cg = NULL;
+	free(ccg);
+	ccg = NULL;
 	return rv;
 }