From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 11C7FC433E3 for ; Thu, 27 Aug 2020 15:22:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E93AF22B4E for ; Thu, 27 Aug 2020 15:22:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728190AbgH0PWN (ORCPT ); Thu, 27 Aug 2020 11:22:13 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:10330 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728620AbgH0Lat (ORCPT ); Thu, 27 Aug 2020 07:30:49 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id EFA9321DABEC54E4AC31; Thu, 27 Aug 2020 19:30:40 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Thu, 27 Aug 2020 19:30:32 +0800 From: Miaohe Lin To: , , , , , , , , , , CC: , , Subject: [PATCH] net: Set trailer iff skb1 is the last one Date: Thu, 27 Aug 2020 07:29:22 -0400 Message-ID: <20200827112922.48889-1-linmiaohe@huawei.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Set trailer iff skb1 is the skbuff where the tailbits space begins. Signed-off-by: Miaohe Lin --- net/core/skbuff.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 0b24aed04060..18ed56316e56 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -4488,8 +4488,9 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer) skb1 = skb2; } elt++; - *trailer = skb1; skb_p = &skb1->next; + if (!*skb_p) + *trailer = skb1; } return elt; -- 2.19.1