bio chain test: ensure the length of empty chains is 0

1 files changed, 9 insertions, 3 deletions

diff --git a/src/regress/lib/libcrypto/bio/bio_chain.c b/src/regress/lib/libcrypto/bio/bio_chain.c
index 81b3b862f7..81f9b82040 100644
--- a/src/regress/lib/libcrypto/bio/bio_chain.c
+++ b/src/regress/lib/libcrypto/bio/bio_chain.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bio_chain.c,v 1.8 2022/12/09 07:46:54 tb Exp $        */
+/*      $OpenBSD: bio_chain.c,v 1.9 2022/12/09 07:47:59 tb Exp $        */
 /*
  * Copyright (c) 2022 Theo Buehler <tb@openbsd.org>
  *
@@ -200,8 +200,11 @@ walk_forward(BIO *start, BIO *end, size_t expected_len, size_t i, size_t j,
         size_t len;
         int ret = 0;
 
-        if (start == NULL || end == NULL)
+        if (start == NULL || end == NULL) {
+                if (expected_len != 0)
+                        goto err;
                 goto done;
+        }
 
         next = start;
         len = 0;
@@ -240,8 +243,11 @@ walk_backward(BIO *start, BIO *end, size_t expected_len, size_t i, size_t j,
         size_t len;
         int ret = 0;
 
-        if (start == NULL || end == NULL)
+        if (start == NULL || end == NULL) {
+                if (expected_len != 0)
+                        goto err;
                 goto done;
+        }
 
         prev = end;
         len = 0;