From patchwork Mon Feb 8 15:00:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 379271 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=-19.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 56A08C433E0 for ; Mon, 8 Feb 2021 15:05:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 10A2D64EC8 for ; Mon, 8 Feb 2021 15:05:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229888AbhBHPFl (ORCPT ); Mon, 8 Feb 2021 10:05:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:52452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232893AbhBHPE3 (ORCPT ); Mon, 8 Feb 2021 10:04:29 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 539A064EBD; Mon, 8 Feb 2021 15:02:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1612796566; bh=9SelmvBUFoaDeZyabkj9AwxAyMifaS6yjXJuq/hywkc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=crwxxsH/MjU4WdrnjDDZVpxItJPOWxGsaKXwenOatleNbyRDWL8uOOQoyjHxBl7G+ zLzHytqctcbu4f8AyncKtoiyi0bp3ywK/MPc0nmiJIYZJA+LeSQnSUi92ic6ox3LhV bFR1dCrcWSCcG++td8gOzOIzC7zTt4WeTye/35pg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Felix Fietkau , Johannes Berg Subject: [PATCH 4.4 26/38] mac80211: fix station rate table updates on assoc Date: Mon, 8 Feb 2021 16:00:48 +0100 Message-Id: <20210208145806.306295923@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210208145805.279815326@linuxfoundation.org> References: <20210208145805.279815326@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Felix Fietkau commit 18fe0fae61252b5ae6e26553e2676b5fac555951 upstream. If the driver uses .sta_add, station entries are only uploaded after the sta is in assoc state. Fix early station rate table updates by deferring them until the sta has been uploaded. Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau Link: https://lore.kernel.org/r/20210201083324.3134-1-nbd@nbd.name [use rcu_access_pointer() instead since we won't dereference here] Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- net/mac80211/driver-ops.c | 5 ++++- net/mac80211/rate.c | 3 ++- 2 files changed, 6 insertions(+), 2 deletions(-) --- a/net/mac80211/driver-ops.c +++ b/net/mac80211/driver-ops.c @@ -128,8 +128,11 @@ int drv_sta_state(struct ieee80211_local } else if (old_state == IEEE80211_STA_AUTH && new_state == IEEE80211_STA_ASSOC) { ret = drv_sta_add(local, sdata, &sta->sta); - if (ret == 0) + if (ret == 0) { sta->uploaded = true; + if (rcu_access_pointer(sta->sta.rates)) + drv_sta_rate_tbl_update(local, sdata, &sta->sta); + } } else if (old_state == IEEE80211_STA_ASSOC && new_state == IEEE80211_STA_AUTH) { drv_sta_remove(local, sdata, &sta->sta); --- a/net/mac80211/rate.c +++ b/net/mac80211/rate.c @@ -888,7 +888,8 @@ int rate_control_set_rates(struct ieee80 if (old) kfree_rcu(old, rcu_head); - drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta); + if (sta->uploaded) + drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta); return 0; }