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

[openssl.git] / crypto / bio / bss_bio.c

diff --git a/crypto/bio/bss_bio.c b/crypto/bio/bss_bio.c
index 7fa8778cae10d476270d6f952118455d438f9859..92dd26230916d42def96bd874c63837cda543215 100644 (file)
--- 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;