Initialize readbytes in BIO_gets()

If the bgets() callback returns <= 0, we currently rely on the user
provided callback to set readbytes, which isn't ideal. This also
matches what's done in BIO_read() and BIO_write().

ok jsing

diff --git a/lib/libcrypto/bio/bio_lib.c b/lib/libcrypto/bio/bio_lib.c
index 0b6c9ec..2ac0abd 100644 (file)
--- a/lib/libcrypto/bio/bio_lib.c
+++ b/lib/libcrypto/bio/bio_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bio_lib.c,v 1.35 2022/01/14 08:40:57 tb Exp $ */
+/* $OpenBSD: bio_lib.c,v 1.36 2022/08/15 10:48:45 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -464,7 +464,7 @@ BIO_puts(BIO *b, const char *in)
 int
 BIO_gets(BIO *b, char *in, int inl)
 {
-       size_t readbytes;
+       size_t readbytes = 0;
        int ret;
 
        if (b == NULL || b->method == NULL || b->method->bgets == NULL) {