few missing allocation failure checks and releases on error paths

- Missing checks for allocation failure.
- releasing memory in few missing error paths

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/crypto/evp/bio_b64.c b/crypto/evp/bio_b64.c
index cdb50b4584..6a95cf6dd6 100644
--- a/crypto/evp/bio_b64.c
+++ b/crypto/evp/bio_b64.c
@@ -118,10 +118,15 @@ static int b64_new(BIO *bi)
 
     ctx = OPENSSL_zalloc(sizeof(*ctx));
     if (ctx == NULL)
-        return (0);
+        return 0;
 
     ctx->cont = 1;
     ctx->start = 1;
+    if (ctx->base64 == NULL) {
+        OPENSSL_free(ctx);
+        return 0;
+    }
+
     ctx->base64 = EVP_ENCODE_CTX_new();
     BIO_set_data(bi, ctx);
     BIO_set_init(bi, 1);