fix potential memory leak

Submitted by: Goetz Babin-Ebell

diff --git a/crypto/pkcs7/pk7_smime.c b/crypto/pkcs7/pk7_smime.c
index d37be48239928b599b6ded6f49c84f6008e57583..b6146d75c4176d1956388d27b623ab12f3a9eb20 100644 (file)
--- a/crypto/pkcs7/pk7_smime.c
+++ b/crypto/pkcs7/pk7_smime.c
@@ -88,6 +88,7 @@ PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 
        if (!(si = PKCS7_add_signature(p7,signcert,pkey,EVP_sha1()))) {
                PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
+               PKCS7_free(p7);
                return NULL;
        }
 
@@ -105,6 +106,7 @@ PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
                {
                if(!(smcap = sk_X509_ALGOR_new_null())) {
                        PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
+                       PKCS7_free(p7);
                        return NULL;
                }
 #ifndef OPENSSL_NO_DES
@@ -130,6 +132,7 @@ PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 
        if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
                PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
+               PKCS7_free(p7);
                return NULL;
        }
 
@@ -139,10 +142,12 @@ PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 
         if (!PKCS7_dataFinal(p7,p7bio)) {
                PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_DATASIGN);
+               PKCS7_free(p7);
+               BIO_free_all(p7bio);
                return NULL;
        }
 
-        BIO_free_all(p7bio);
+       BIO_free_all(p7bio);
        return p7;
 }