If we don't do this, we will use freed memory on restart. Part of 24581.
@@ -3470,6 +3470,8 @@ crypto_global_cleanup(void)
if (dh_param_g)
BN_clear_free(dh_param_g);
+ dh_param_p = dh_param_p_tls = dh_param_g = NULL;
+
#ifndef DISABLE_ENGINES
ENGINE_cleanup();
#endif