1 files changed, 72 insertions, 1 deletions

diff --git a/src/regress/lib/libcrypto/bio/biotest.c b/src/regress/lib/libcrypto/bio/biotest.c
index 442c64e93b..d31e51e454 100644
--- a/src/regress/lib/libcrypto/bio/biotest.c
+++ b/src/regress/lib/libcrypto/bio/biotest.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: biotest.c,v 1.7 2022/02/17 18:51:58 jsing Exp $       */
+/*      $OpenBSD: biotest.c,v 1.8 2022/02/19 16:00:57 jsing Exp $       */
 /*
  * Copyright (c) 2014, 2022 Joel Sing <jsing@openbsd.org>
  *
@@ -274,6 +274,76 @@ bio_mem_test(void)
 }
 
 static int
+bio_mem_small_io_test(void)
+{
+        uint8_t buf[2];
+        int i, j, ret;
+        BIO *bio;
+        int failed = 1;
+
+        memset(buf, 0xdb, sizeof(buf));
+
+        if ((bio = BIO_new(BIO_s_mem())) == NULL) {
+                fprintf(stderr, "FAIL: BIO_new() returned NULL\n");
+                goto failure;
+        }
+
+        for (i = 0; i < 100; i++) {
+                if (!BIO_reset(bio)) {
+                        fprintf(stderr, "FAIL: BIO_reset() failed\n");
+                        goto failure;
+                }
+                for (j = 0; j < 25000; j++) {
+                        ret = BIO_write(bio, buf, sizeof(buf));
+                        if (ret != sizeof(buf)) {
+                                fprintf(stderr, "FAIL: BIO_write() = %d, "
+                                    "want %zu\n", ret, sizeof(buf));
+                                goto failure;
+                        }
+                }
+                for (j = 0; j < 25000; j++) {
+                        ret = BIO_read(bio, buf, sizeof(buf));
+                        if (ret != sizeof(buf)) {
+                                fprintf(stderr, "FAIL: BIO_read() = %d, "
+                                    "want %zu\n", ret, sizeof(buf));
+                                goto failure;
+                        }
+                        ret = BIO_write(bio, buf, sizeof(buf));
+                        if (ret != sizeof(buf)) {
+                                fprintf(stderr, "FAIL: BIO_write() = %d, "
+                                    "want %zu\n", ret, sizeof(buf));
+                                goto failure;
+                        }
+                }
+                for (j = 0; j < 25000; j++) {
+                        ret = BIO_read(bio, buf, sizeof(buf));
+                        if (ret != sizeof(buf)) {
+                                fprintf(stderr, "FAIL: BIO_read() = %d, "
+                                    "want %zu\n", ret, sizeof(buf));
+                                goto failure;
+                        }
+                }
+                if (!BIO_eof(bio)) {
+                        fprintf(stderr, "FAIL: BIO not EOF\n");
+                        goto failure;
+                }
+        }
+
+        if (buf[0] != 0xdb || buf[1] != 0xdb) {
+                fprintf(stderr, "FAIL: buf = {0x%x, 0x%x}, want {0xdb, 0xdb}\n",
+                    buf[0], buf[1]);
+                goto failure;
+        }
+
+        failed = 0;
+
+ failure:
+        BIO_free(bio);
+
+        return failed;
+}
+
+static int
 bio_mem_readonly_test(void)
 {
         uint8_t *data = NULL;
@@ -389,6 +459,7 @@ do_bio_mem_tests(void)
         int failed = 0;
 
         failed |= bio_mem_test();
+        failed |= bio_mem_small_io_test();
         failed |= bio_mem_readonly_test();
 
         return failed;