Add a missing NULL check for group

ok jsing

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libcrypto/ecdh/ech_key.c b/src/lib/libcrypto/ecdh/ech_key.c
index f0c760b8da..fc023af986 100644
--- a/src/lib/libcrypto/ecdh/ech_key.c
+++ b/src/lib/libcrypto/ecdh/ech_key.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ech_key.c,v 1.23 2023/07/01 14:52:34 tb Exp $ */
+/* $OpenBSD: ech_key.c,v 1.24 2023/07/01 14:53:48 tb Exp $ */
 /* ====================================================================
  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  *
@@ -121,7 +121,8 @@ ossl_ecdh_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
                 goto err;
         }
 
-        group = EC_KEY_get0_group(ecdh);
+        if ((group = EC_KEY_get0_group(ecdh)) == NULL)
+                goto err;
 
         if (!EC_POINT_is_on_curve(group, pub_key, ctx))
                 goto err;