Don't fail in ober_scanf_elements() when encountering empty sequences.

Ok martijn@

diff --git a/lib/libutil/ber.c b/lib/libutil/ber.c
index 3a19274..cd3bcd0 100644 (file)
--- a/lib/libutil/ber.c
+++ b/lib/libutil/ber.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ber.c,v 1.24 2022/11/03 17:58:10 martijn Exp $ */
+/*     $OpenBSD: ber.c,v 1.25 2023/08/22 12:50:27 gerhard Exp $ */
 
 /*
  * Copyright (c) 2007, 2012 Reyk Floeter <reyk@openbsd.org>
@@ -797,7 +797,7 @@ ober_scanf_elements(struct ber_element *ber, char *fmt, ...)
                        if (ber->be_encoding != BER_TYPE_SEQUENCE &&
                            ber->be_encoding != BER_TYPE_SET)
                                goto fail;
-                       if (ber->be_sub == NULL || level >= _MAX_SEQ-1)
+                       if (level >= _MAX_SEQ-1)
                                goto fail;
                        parent[++level] = ber;
                        ber = ber->be_sub;