acl: Fix crash when group ACLs are used, but user's acl_groups is empty

diff --git a/src/plugins/acl/acl-backend.c b/src/plugins/acl/acl-backend.c
index 2ad901cd962c8260f3bdab6afde758018ad0dfc8..cc08d702dd3e58bdcbd624f8ffa0c53af4e34cb6 100644 (file)
--- a/src/plugins/acl/acl-backend.c
+++ b/src/plugins/acl/acl-backend.c
@@ -155,7 +155,8 @@ bool acl_backend_user_name_equals(struct acl_backend *backend,
 bool acl_backend_user_is_in_group(struct acl_backend *backend,
                                  const char *group_name)
 {
-       return array_bsearch(&backend->set->acl_groups, group_name,
+       return array_not_empty(&backend->set->acl_groups) &&
+              array_bsearch(&backend->set->acl_groups, group_name,
                             search_strcmp) != NULL;
 }