Fix memory leak in error path of ec_gen_init()

ec_gen_set_params() can fail after some big numbers have already been
copied over. Those need to be cleaned to avoid a memory leak on failure.
This can be done with ec_gen_cleanup(), which is also consistent in how
the ecx_gen code does it.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29335)

diff --git a/providers/implementations/keymgmt/ec_kmgmt.c b/providers/implementations/keymgmt/ec_kmgmt.c
index 7e9b7236225b3323b1913439eb41a298e0898f3b..cc3cf75cd8082f02ae8d0912a2df94417bd85281 100644 (file)
--- a/providers/implementations/keymgmt/ec_kmgmt.c
+++ b/providers/implementations/keymgmt/ec_kmgmt.c
@@ -985,7 +985,7 @@ static void *ec_gen_init(void *provctx, int selection,
         gctx->ecdh_mode = 0;
         OSSL_FIPS_IND_INIT(gctx)
         if (!ec_gen_set_params(gctx, params)) {
-            OPENSSL_free(gctx);
+            ec_gen_cleanup(gctx);
             gctx = NULL;
         }
     }