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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 3A8D6C43603 for ; Fri, 20 Dec 2019 12:32:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 13F7624680 for ; Fri, 20 Dec 2019 12:32:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727432AbfLTMcW (ORCPT ); Fri, 20 Dec 2019 07:32:22 -0500 Received: from charlotte.tuxdriver.com ([70.61.120.58]:57384 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727301AbfLTMcV (ORCPT ); Fri, 20 Dec 2019 07:32:21 -0500 Received: from 2606-a000-111b-43ee-0000-0000-0000-115f.inf6.spectrum.com ([2606:a000:111b:43ee::115f] helo=localhost) by smtp.tuxdriver.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.63) (envelope-from ) id 1iiHRt-00077n-5i; Fri, 20 Dec 2019 07:32:15 -0500 Date: Fri, 20 Dec 2019 07:32:03 -0500 From: Neil Horman To: Kevin Kou Cc: vyasevich@gmail.com, marcelo.leitner@gmail.com, davem@davemloft.net, linux-sctp@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] sctp: do trace_sctp_probe after SACK validation and check Message-ID: <20191220123203.GA5616@hmswarspite.think-freely.org> References: <20191220044703.88-1-qdkevin.kou@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191220044703.88-1-qdkevin.kou@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 20, 2019 at 04:47:03AM +0000, Kevin Kou wrote: > The function sctp_sf_eat_sack_6_2 now performs > the Verification Tag validation, Chunk length validation, Bogu check, > and also the detection of out-of-order SACK based on the RFC2960 > Section 6.2 at the beginning, and finally performs the further > processing of SACK. The trace_sctp_probe now triggered before > the above necessary validation and check. > > This patch is to do the trace_sctp_probe after the necessary check > and validation to SACK. > > Signed-off-by: Kevin Kou > --- > net/sctp/sm_statefuns.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c > index 42558fa..b4a54df 100644 > --- a/net/sctp/sm_statefuns.c > +++ b/net/sctp/sm_statefuns.c > @@ -3281,7 +3281,6 @@ enum sctp_disposition sctp_sf_eat_sack_6_2(struct net *net, > struct sctp_sackhdr *sackh; > __u32 ctsn; > > - trace_sctp_probe(ep, asoc, chunk); > > if (!sctp_vtag_verify(chunk, asoc)) > return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands); > @@ -3319,6 +3318,8 @@ enum sctp_disposition sctp_sf_eat_sack_6_2(struct net *net, > if (!TSN_lt(ctsn, asoc->next_tsn)) > return sctp_sf_violation_ctsn(net, ep, asoc, type, arg, commands); > > + trace_sctp_probe(ep, asoc, chunk); > + > /* Return this SACK for further processing. */ > sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_SACK, SCTP_CHUNK(chunk)); > > -- > 1.8.3.1 > > Acked-by: Neil Horman