From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:36230 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726529AbeJIBuT (ORCPT ); Mon, 8 Oct 2018 21:50:19 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yuan-Chi Pang , Johannes Berg , Sasha Levin Subject: [PATCH 4.4 078/113] mac80211: mesh: fix HWMP sequence numbering to follow standard Date: Mon, 8 Oct 2018 20:31:19 +0200 Message-Id: <20181008175535.216280370@linuxfoundation.org> In-Reply-To: <20181008175530.864641368@linuxfoundation.org> References: <20181008175530.864641368@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yuan-Chi Pang [ Upstream commit 1f631c3201fe5491808df143d8fcba81b3197ffd ] IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says: If it is a target mesh STA, it shall update its own HWMP SN to maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1 immediately before it generates a PREP element in response to a PREQ element. Signed-off-by: Yuan-Chi Pang Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/mac80211/mesh_hwmp.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -552,6 +552,10 @@ static void hwmp_preq_frame_process(stru forward = false; reply = true; target_metric = 0; + + if (SN_GT(target_sn, ifmsh->sn)) + ifmsh->sn = target_sn; + if (time_after(jiffies, ifmsh->last_sn_update + net_traversal_jiffies(sdata)) || time_before(jiffies, ifmsh->last_sn_update)) {