Avoid calling ibuf_add() with NULL and zero length.

ok patrick@

diff --git a/sbin/iked/imsg_util.c b/sbin/iked/imsg_util.c
index 90b7f6e..2f0ee32 100644 (file)
--- a/sbin/iked/imsg_util.c
+++ b/sbin/iked/imsg_util.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: imsg_util.c,v 1.12 2019/11/30 15:44:07 tobhe Exp $    */
+/*     $OpenBSD: imsg_util.c,v 1.13 2021/05/17 08:14:37 tobhe Exp $    */
 
 /*
  * Copyright (c) 2010-2013 Reyk Floeter <reyk@openbsd.org>
@@ -59,7 +59,10 @@ ibuf_new(const void *data, size_t len)
 
        ibuf_zero(buf);
 
-       if (data == NULL && len) {
+       if (len == 0)
+               return (buf);
+
+       if (data == NULL) {
                if (ibuf_advance(buf, len) == NULL) {
                        ibuf_free(buf);
                        return (NULL);