networkd: fix memory leak in promote_secondaries_enabled

diff --git a/src/network/networkd-dhcp4.c b/src/network/networkd-dhcp4.c
index 5ce03e5d40cb07490667f62ea5b0d893ebe71109..ac1781d83ee432f7b95e718637185050696dc496 100644 (file)
--- a/src/network/networkd-dhcp4.c
+++ b/src/network/networkd-dhcp4.c
@@ -590,7 +590,8 @@ static int dhcp4_set_hostname(Link *link) {
 }
 
 static bool promote_secondaries_enabled(const char *ifname) {
-        char *promote_secondaries_sysctl, *promote_secondaries_path;
+        _cleanup_free_ char *promote_secondaries_sysctl = NULL;
+        char *promote_secondaries_path;
         int r;
 
         promote_secondaries_path = strjoina("net/ipv4/conf/", ifname, "/promote_secondaries");