kdf objects missing a return if malloc fails.

I have searched through all references of ERR_R_MALLOC_FAILURE for any
other instances..

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18638)

2 files changed, 7 insertions, 3 deletions

diff --git a/providers/implementations/kdfs/tls1_prf.c b/providers/implementations/kdfs/tls1_prf.c
index 96eab4ea41..fd46283d3a 100644
--- a/providers/implementations/kdfs/tls1_prf.c
+++ b/providers/implementations/kdfs/tls1_prf.c
@@ -103,8 +103,10 @@ static void *kdf_tls1_prf_new(void *provctx)
     if (!ossl_prov_is_running())
         return NULL;
 
-    if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
+    if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
+        return NULL;
+    }
     ctx->provctx = provctx;
     return ctx;
 }
diff --git a/providers/implementations/kdfs/x942kdf.c b/providers/implementations/kdfs/x942kdf.c
index 487c3295f2..51b2ebf26b 100644
--- a/providers/implementations/kdfs/x942kdf.c
+++ b/providers/implementations/kdfs/x942kdf.c
@@ -333,10 +333,12 @@ static void *x942kdf_new(void *provctx)
     KDF_X942 *ctx;
 
     if (!ossl_prov_is_running())
-        return 0;
+        return NULL;
 
-    if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
+    if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
+        return NULL;
+    }
     ctx->provctx = provctx;
     ctx->use_keybits = 1;
     return ctx;