Fix the BIO callback return code handling

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

diff --git a/crypto/bio/bio_lib.c b/crypto/bio/bio_lib.c
index 95eef7d4bf5b85da2a2ba46f0887fd2577bea64d..ca375b911ae8b510b39c0456f90b897a3aff6756 100644 (file)
--- a/crypto/bio/bio_lib.c
+++ b/crypto/bio/bio_lib.c
@@ -52,7 +52,7 @@ static long bio_call_callback(BIO *b, int oper, const char *argp, size_t len,
         argi = (int)len;
     }
 
-    if (inret && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
+    if (inret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
         if (*processed > INT_MAX)
             return -1;
         inret = *processed;
@@ -60,7 +60,7 @@ static long bio_call_callback(BIO *b, int oper, const char *argp, size_t len,
 
     ret = b->callback(b, oper, argp, argi, argl, inret);
 
-    if (ret >= 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
+    if (ret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
         *processed = (size_t)ret;
         ret = 1;
     }