From patchwork Tue Jun 29 13:52:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 469063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B790DC11F66 for ; Tue, 29 Jun 2021 13:52:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99B4F61DC8 for ; Tue, 29 Jun 2021 13:52:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234197AbhF2Nyp (ORCPT ); Tue, 29 Jun 2021 09:54:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233050AbhF2Nyp (ORCPT ); Tue, 29 Jun 2021 09:54:45 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2960AC061760 for ; Tue, 29 Jun 2021 06:52:18 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id y17so6276819pgf.12 for ; Tue, 29 Jun 2021 06:52:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=rEANJ6ZYXzAbzUCFX9DpA/6cGg1pyPGuwHqrG52x8oI=; b=HGV5+hGsO4tG9zTtWUb+SXYuwLHobEFsyxhcALqTDgO52uvjgETEBE4TTT9sMfkCdf WtefeL7QQzD+OZJHA0JXCpryuXUv/zaDHjbEX9hK86SmI+uoNrHTTLeEtiKNAmN5da1l Lcvs+cWviRKKEaLMl75fGfkc0qmgq2xrHuv6SHmRk/Wjfof5tSG3eJxl/jyR0FNM+IAU 1aX3eE4u5XwzSLjE7xkOILjkb8dfJzml52fWamqhzkm8vhaA9BdgI76DUxTiSux2lOGR 1Q7NlPbQJWpZRaxH0NvhMgwI5B3pc9UP12OyAc4JekU/1C+GzHYtSUt4+1OoTymMAlED QdOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=rEANJ6ZYXzAbzUCFX9DpA/6cGg1pyPGuwHqrG52x8oI=; b=N2iNA8/LgmplDT0yH4lKMkW6CZqe2FvmJjxMECoL2dHlPFN3+stZIjr5Q4hqgjRkgg mLZx2OO9RYgpMCGXI8d3O8aUuEviGDCBrOw+HA1bTnFXQfhG38FL5RDhlcbbs2aGOkMa 7ayJqsX7T5H6eZQCdqPXR5CYH237GLAlx4/sSqo+fE+mWP+Oq27t3VYLjI54c/iINlxz Ga+0WbMqEPIx4us2JRKwZXn0ASYN/4gOLZz0mbojMlnDOi2PfgpI9xnyJB281FOSq+4g JEE9aBK6MYG9SHSVDBzCFFY+EkWs2fPbHjkvY73aYQaVnpRtiAzHjuBxK9s4FddG4poY HBtg== X-Gm-Message-State: AOAM532YRaEyhdP3ldzuoxGYHSy5pYwEJDmSBDrM4XqzH3A1+RRLmbCa plw/r+vPh7Xt/jdKbW6Vg2WOUvJUGXc= X-Google-Smtp-Source: ABdhPJzdZ5OdFnSJwRlxRq8bFpiAHP1PqT9Vfr9UHsIzcgYz/+l7bDbJX4qbKOYvpFY5L9P4H4Q/7A== X-Received: by 2002:a65:4389:: with SMTP id m9mr4204651pgp.184.1624974737731; Tue, 29 Jun 2021 06:52:17 -0700 (PDT) Received: from edumazet1.svl.corp.google.com ([2620:15c:2c4:201:6838:b492:569f:2a9a]) by smtp.gmail.com with ESMTPSA id 7sm18744447pfu.24.2021.06.29.06.52.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jun 2021 06:52:17 -0700 (PDT) From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski Cc: netdev , Eric Dumazet , Eric Dumazet Subject: [PATCH net-next] tcp_yeah: check struct yeah size at compile time Date: Tue, 29 Jun 2021 06:52:13 -0700 Message-Id: <20210629135213.1070529-1-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.32.0.93.g670b81a890-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eric Dumazet Compiler can perform the sanity check instead of waiting to load the module and crash the host. Signed-off-by: Eric Dumazet --- net/ipv4/tcp_yeah.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp_yeah.c b/net/ipv4/tcp_yeah.c index 3bb448761ca38ab169ebac02c5f39020e7469ba9..07c4c93b9fdb65a513d99532ed7c066cec7d89f4 100644 --- a/net/ipv4/tcp_yeah.c +++ b/net/ipv4/tcp_yeah.c @@ -221,7 +221,7 @@ static struct tcp_congestion_ops tcp_yeah __read_mostly = { static int __init tcp_yeah_register(void) { - BUG_ON(sizeof(struct yeah) > ICSK_CA_PRIV_SIZE); + BUILD_BUG_ON(sizeof(struct yeah) > ICSK_CA_PRIV_SIZE); tcp_register_congestion_control(&tcp_yeah); return 0; }