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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A582AC43381 for ; Wed, 23 Dec 2020 02:53:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A893205CA for ; Wed, 23 Dec 2020 02:53:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729277AbgLWCVQ (ORCPT ); Tue, 22 Dec 2020 21:21:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:49658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729251AbgLWCVO (ORCPT ); Tue, 22 Dec 2020 21:21:14 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 37393225AA; Wed, 23 Dec 2020 02:20:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1608690054; bh=B6gMvVcQGWw+yIct8QLLq777HCeZBqK6uUk2SPyejB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cLnXRjfN8GmC9w0n2b4XtmcNiRnfOSgesQpq/UPRPAMTaicyd2wwRxxFnbrHuQqI4 Fnr3+enAbxKuVjQlEjpOnjwryLFNlKFNzvN/xEsPgNGnNT8qP9XSpa01eUuvHva+dP 0urvIgEosJ8ji/EfGtJXla62A97Y1Vqw5zvyadkEx5htoPmV6uVrnEO56Ez6PeX3DB BsNjip2SOuryIHYuvR9AxywXNTQhOUKoVL7O+WlgJMkPhmwEP2xX0jjS0dqnjID4Oc poZHWvAAAdpLi8TSoDwvf8lVMoxTtJGW4K9LJpox8O2vQtzTi+PzIm/S5Jp/GprabG /MWBKhHoCOWWA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Emmanuel Grumbach , Luca Coelho , Johannes Berg , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 124/130] mac80211: don't filter out beacons once we start CSA Date: Tue, 22 Dec 2020 21:18:07 -0500 Message-Id: <20201223021813.2791612-124-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201223021813.2791612-1-sashal@kernel.org> References: <20201223021813.2791612-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Emmanuel Grumbach [ Upstream commit 189a164d0fc6c59a22c4486d641d0a0a0d33387a ] I hit a bug in which we started a CSA with an action frame, but the AP changed its mind and didn't change the beacon. The CSA wasn't cancelled and we lost the connection. The beacons were ignored because they never changed: they never contained any CSA IE. Because they never changed, the CRC of the beacon didn't change either which made us ignore the beacons instead of processing them. Now what happens is: 1) beacon has CRC X and it is valid. No CSA IE in the beacon 2) as long as beacon's CRC X, don't process their IEs 3) rx action frame with CSA 4) invalidate the beacon's CRC 5) rx beacon, CRC is still X, but now it is invalid 6) process the beacon, detect there is no CSA IE 7) abort CSA Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20201206145305.83470b8407e6.I739b907598001362744692744be15335436b8351@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/mlme.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index ba1e5cac32adb..ed12519e3a634 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1415,6 +1415,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, sdata->csa_chandef = csa_ie.chandef; sdata->csa_block_tx = csa_ie.mode; ifmgd->csa_ignored_same_chan = false; + ifmgd->beacon_crc_valid = false; if (sdata->csa_block_tx) ieee80211_stop_vif_queues(local, sdata, -- 2.27.0