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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 1A146C43381 for ; Fri, 22 Mar 2019 13:14:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3F212183E for ; Fri, 22 Mar 2019 13:14:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553260471; bh=wwfsgdD3P4YyMvk/Kxol5IIq/mmUxQVBibATJvG1JTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Rh43FpmSzYcCi9u44wbEYOSAEI5aRyi9XkvCsh/6ucaSQvrhuIpPrNT1TwFCeJCo/ ubcB95mw1VR2UFhBexD0QtY6D2mBjvusr/N5a8KQ0uRxMs+q/gEnGcXfV/Utv042SU m1QW72j/5DgKSAh7gNV23U1kX2wbv0oUwpj+2Yiw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729845AbfCVNO3 (ORCPT ); Fri, 22 Mar 2019 09:14:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:57122 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729345AbfCVL3R (ORCPT ); Fri, 22 Mar 2019 07:29:17 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 334B9218B0; Fri, 22 Mar 2019 11:29:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553254156; bh=wwfsgdD3P4YyMvk/Kxol5IIq/mmUxQVBibATJvG1JTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RhDLWNUhGdlSycy1iZbN4CpXt/bmSuziQaVc/hmIOxVALUYormLOzI3KEl9YYRlcA FkSytS/CbaV6ylPeD19KK1HSBxFui9YnkHWGyOqOORCBTAfC7ylPbrue1F34ortMGZ xGELaXvwjlhus3kAxzEfwDBFskWnPSyyPOok8y0I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bob Copeland , Johannes Berg , Sasha Levin Subject: [PATCH 4.4 041/230] mac80211: fix miscounting of ttl-dropped frames Date: Fri, 22 Mar 2019 12:12:59 +0100 Message-Id: <20190322111239.593592022@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190322111236.796964179@linuxfoundation.org> References: <20190322111236.796964179@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit a0dc02039a2ee54fb4ae400e0b755ed30e73e58c ] In ieee80211_rx_h_mesh_fwding, we increment the 'dropped_frames_ttl' counter when we decrement the ttl to zero. For unicast frames destined for other hosts, we stop processing the frame at that point. For multicast frames, we do not rebroadcast it in this case, but we do pass the frame up the stack to process it on this STA. That doesn't match the usual definition of "dropped," so don't count those as such. With this change, something like `ping6 -i0.2 ff02::1%mesh0` from a peer in a ttl=1 network no longer increments the counter rapidly. Signed-off-by: Bob Copeland Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/rx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index acacceec8cd86..833ad779659c8 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2340,7 +2340,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) skb_set_queue_mapping(skb, q); if (!--mesh_hdr->ttl) { - IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); + if (!is_multicast_ether_addr(hdr->addr1)) + IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, + dropped_frames_ttl); goto out; } -- 2.19.1