From 25d5d15fd5847acf7eb46cda8d9e5aa2489dd740 Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Thu, 8 Mar 2012 14:01:44 +0000
Subject: [PATCH] check return value of BIO_write in PKCS7_decrypt

---
 crypto/pkcs7/pk7_smime.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crypto/pkcs7/pk7_smime.c b/crypto/pkcs7/pk7_smime.c
index fd56b42066..6b458af3d7 100644
--- a/crypto/pkcs7/pk7_smime.c
+++ b/crypto/pkcs7/pk7_smime.c
@@ -507,7 +507,11 @@ int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
 					
 				break;
 				}
-			BIO_write(data, buf, i);
+			if (BIO_write(data, buf, i) != i)
+				{
+				ret = 0;
+				break;
+				}
 		}
 		BIO_free_all(tmpmem);
 		return ret;