Avoid duplicate free when netgroup_base is invalid.

diff --git a/plugins/sudoers/ldap.c b/plugins/sudoers/ldap.c
index 42582933560b59c778764e78ad46a2be91a9d8ff..0c5047d42bf8ed769f635454bf9ef24ce1b211a9 100644 (file)
--- a/plugins/sudoers/ldap.c
+++ b/plugins/sudoers/ldap.c
@@ -830,6 +830,7 @@ sudo_netgroup_lookup(LDAP *ld, struct passwd *pw,
        if (rc != LDAP_SUCCESS) {
            DPRINTF1("ldap netgroup search failed: %s", ldap_err2string(rc));
            ldap_msgfree(result);
+           result = NULL;
            continue;
        }