Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753960AbdFSPcr (ORCPT ); Mon, 19 Jun 2017 11:32:47 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:44066 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751108AbdFSPcn (ORCPT ); Mon, 19 Jun 2017 11:32:43 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Emmanuel Grumbach , Johannes Berg Subject: [PATCH 4.4 05/30] mac80211: dont look at the PM bit of BAR frames Date: Mon, 19 Jun 2017 23:20:39 +0800 Message-Id: <20170619152033.500742481@linuxfoundation.org> X-Mailer: git-send-email 2.13.1 In-Reply-To: <20170619152033.211450261@linuxfoundation.org> References: <20170619152033.211450261@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1553 Lines: 41 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Emmanuel Grumbach commit 769dc04db3ed8484798aceb015b94deacc2ba557 upstream. When a peer sends a BAR frame with PM bit clear, we should not modify its PM state as madated by the spec in 802.11-20012 10.2.1.2. Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- net/mac80211/rx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1455,12 +1455,16 @@ ieee80211_rx_h_sta_process(struct ieee80 */ if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) && !ieee80211_has_morefrags(hdr->frame_control) && + !ieee80211_is_back_req(hdr->frame_control) && !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && (rx->sdata->vif.type == NL80211_IFTYPE_AP || rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && - /* PM bit is only checked in frames where it isn't reserved, + /* + * PM bit is only checked in frames where it isn't reserved, * in AP mode it's reserved in non-bufferable management frames * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) + * BAR frames should be ignored as specified in + * IEEE 802.11-2012 10.2.1.2. */ (!ieee80211_is_mgmt(hdr->frame_control) || ieee80211_is_bufferable_mmpdu(hdr->frame_control))) {