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,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 52738C282CE for ; Mon, 11 Feb 2019 15:59:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24BCD218D8 for ; Mon, 11 Feb 2019 15:59:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549900799; bh=kYaegojv1mYe31QyiQefdE9ThACyYSqoiTsRdzbkuO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=x/ky44WltmBlBnCks5CCjzNvg6PEAm5cYANBYDi8ZhlmOwQ5hJJUQnk3JA1flyExN Em5k28sm5R7S7sRxph0jl3zvsZsXoLBuXtce9Ckcv0wP2+5J1nBgLm7XhnO91zI54/ KBdaKO61jmnKfxJ8J2Eu50uXpDDvbF8vm/xXEyaY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729870AbfBKOb6 (ORCPT ); Mon, 11 Feb 2019 09:31:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:39100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730389AbfBKOb4 (ORCPT ); Mon, 11 Feb 2019 09:31:56 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 40C5A20838; Mon, 11 Feb 2019 14:31:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549895515; bh=kYaegojv1mYe31QyiQefdE9ThACyYSqoiTsRdzbkuO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jtsRyQ7GrTpUTwyCIxAiRk3naXij2HunZKJNYw/oSo1p5Md/Olc+3uJURpOKPfmVi pKoIRMSdkxTvdLLBWhLooZjff9O819v/S7iFPIin5weqhIBc6xq/LJKYPGjQ98NgSZ vD2nbuc7b7ipIbVwdvL17B6xrhs1SvMMIlDdyr+c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhi Chen , Kalle Valo , Sasha Levin Subject: [PATCH 4.20 230/352] ath10k: fix tx_stats memory leak Date: Mon, 11 Feb 2019 15:17:37 +0100 Message-Id: <20190211141901.859926316@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190211141846.543045703@linuxfoundation.org> References: <20190211141846.543045703@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: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 386f97e3b201d18578abb0e7037b85a1ae50c0a3 ] Memory of tx_stats was allocated when a STA was added. But it's not freed if the STA failed to be added to driver. This issue could be seen in MDK3 attack case when STA number reached the limit. Tested: QCA9984 with firmware ver 10.4-3.9.0.1-00005 Signed-off-by: Zhi Chen Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath10k/mac.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 6436dc229be5..400495858e4e 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -6293,15 +6293,6 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, ar->num_stations + 1, ar->max_num_stations, ar->num_peers + 1, ar->max_num_peers); - if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { - arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), - GFP_KERNEL); - if (!arsta->tx_stats) { - ret = -ENOMEM; - goto exit; - } - } - num_tdls_stations = ath10k_mac_tdls_vif_stations_count(hw, vif); num_tdls_vifs = ath10k_mac_tdls_vifs_count(hw); @@ -6323,12 +6314,22 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, goto exit; } + if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { + arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), + GFP_KERNEL); + if (!arsta->tx_stats) { + ret = -ENOMEM; + goto exit; + } + } + ret = ath10k_peer_create(ar, vif, sta, arvif->vdev_id, sta->addr, peer_type); if (ret) { ath10k_warn(ar, "failed to add peer %pM for vdev %d when adding a new sta: %i\n", sta->addr, arvif->vdev_id, ret); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); goto exit; } @@ -6341,6 +6342,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, spin_unlock_bh(&ar->data_lock); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); ret = -ENOENT; goto exit; } @@ -6361,6 +6363,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); goto exit; } @@ -6372,6 +6375,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, sta->addr, arvif->vdev_id, ret); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); if (num_tdls_stations != 0) goto exit; -- 2.19.1