From: PW Hu <jlu.hpw@foxmail.com>
Date: Fri, 3 Sep 2021 09:50:40 +0000 (+0800)
Subject: crypto/bio/bss_bio.c/bio_write: improve border check
X-Git-Tag: openssl-3.2.0-alpha1~3587
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a04b06573e2b3c6a5c703a60bd95354c6c6e91dc;p=thirdparty%2Fopenssl.git

crypto/bio/bss_bio.c/bio_write: improve border check

CLA:trivial

Reviewed-by: Ben Kaduk <kaduk@mit.edu>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16503)
---

diff --git a/crypto/bio/bss_bio.c b/crypto/bio/bss_bio.c
index 7fa8778cae1..92dd2623091 100644
--- a/crypto/bio/bss_bio.c
+++ b/crypto/bio/bss_bio.c
@@ -273,7 +273,7 @@ static int bio_write(BIO *bio, const char *buf, int num_)
 
     BIO_clear_retry_flags(bio);
 
-    if (!bio->init || buf == NULL || num == 0)
+    if (!bio->init || buf == NULL || num_ <= 0)
         return 0;
 
     b = bio->ptr;