From patchwork Fri Dec 18 20:16:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Lemon X-Patchwork-Id: 345890 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 2196FC3526C for ; Fri, 18 Dec 2020 20:17:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E066B23A82 for ; Fri, 18 Dec 2020 20:17:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387453AbgLRURV convert rfc822-to-8bit (ORCPT ); Fri, 18 Dec 2020 15:17:21 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:21810 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729424AbgLRURU (ORCPT ); Fri, 18 Dec 2020 15:17:20 -0500 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BIKEJED009793 for ; Fri, 18 Dec 2020 12:16:39 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 35gxyf1k8k-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 18 Dec 2020 12:16:39 -0800 Received: from intmgw001.03.ash8.facebook.com (2620:10d:c085:108::8) by mail.thefacebook.com (2620:10d:c085:21d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 18 Dec 2020 12:16:38 -0800 Received: by devvm2494.atn0.facebook.com (Postfix, from userid 172786) id 05E2259FBE7D; Fri, 18 Dec 2020 12:16:34 -0800 (PST) From: Jonathan Lemon To: , , CC: Subject: [PATCH 9/9 v1 RFC] skbuff: Call skb_zcopy_clear() before unref'ing fragments Date: Fri, 18 Dec 2020 12:16:33 -0800 Message-ID: <20201218201633.2735367-10-jonathan.lemon@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20201218201633.2735367-1-jonathan.lemon@gmail.com> References: <20201218201633.2735367-1-jonathan.lemon@gmail.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-18_12:2020-12-18,2020-12-18 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 phishscore=0 mlxlogscore=450 suspectscore=0 impostorscore=0 priorityscore=1501 spamscore=0 clxscore=1034 mlxscore=0 bulkscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012180136 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jonathan Lemon RX zerocopy fragment pages which are not allocated from the system page pool require special handling. Give the callback in skb_zcopy_clear() a chance to process them first. Signed-off-by: Jonathan Lemon --- 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 463078ba663f..ee75279c7c78 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -605,13 +605,14 @@ static void skb_release_data(struct sk_buff *skb) &shinfo->dataref)) return; + skb_zcopy_clear(skb, true); + for (i = 0; i < shinfo->nr_frags; i++) __skb_frag_unref(&shinfo->frags[i]); if (shinfo->frag_list) kfree_skb_list(shinfo->frag_list); - skb_zcopy_clear(skb, true); skb_free_head(skb); }