Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965067AbbEECG6 (ORCPT ); Mon, 4 May 2015 22:06:58 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:50995 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752210AbbEEBV7 (ORCPT ); Mon, 4 May 2015 21:21:59 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Johannes Berg" Date: Tue, 05 May 2015 02:16:39 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 134/221] nl80211: ignore HT/VHT capabilities without QoS/WMM In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.249 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1630 Lines: 44 3.2.69-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg commit 496fcc294daab18799e190c0264863d653588d1f upstream. As HT/VHT depend heavily on QoS/WMM, it's not a good idea to let userspace add clients that have HT/VHT but not QoS/WMM. Since it does so in certain cases we've observed (client is using HT IEs but not QoS/WMM) just ignore the HT/VHT info at this point and don't pass it down to the drivers which might unconditionally use it. Signed-off-by: Johannes Berg [bwh: Backported to 3.2: - Adjust context - VHT is not supported] Signed-off-by: Ben Hutchings --- --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2650,6 +2650,14 @@ static int nl80211_new_station(struct sk if (parse_station_flags(info, ¶ms)) return -EINVAL; + /* HT requires QoS, but if we don't have that just ignore HT/VHT + * as userspace might just pass through the capabilities from the IEs + * directly, rather than enforcing this restriction and returning an + * error in this case. + */ + if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) + params.ht_capa = NULL; + /* parse WME attributes if sta is WME capable */ if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) && (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) && -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/