[PATCH v2] X.509: Fix error code in x509_cert_parse()

[Dan Carpenter]

We forgot to set the error code on this path so it could result in
returning NULL which leads to a NULL dereference.

Fixes: db6c43bd2132 ("crypto: KEYS: convert public key and digsig asym to the 
akcipher api")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
v2:  Style change

Sorry for the delay, I'm been out of office.

diff --git a/crypto/asymmetric_keys/x509_cert_parser.c 
b/crypto/asymmetric_keys/x509_cert_parser.c
index c80765b211cf..dd03fead1ca3 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -102,6 +102,7 @@ struct x509_certificate *x509_cert_parse(const void *data, 
size_t datalen)
                }
        }
 
+       ret = -ENOMEM;
        cert->pub->key = kmemdup(ctx->key, ctx->key_size, GFP_KERNEL);
        if (!cert->pub->key)
                goto error_decode;