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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 BC8D3C28CF6 for ; Wed, 1 Aug 2018 18:19:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A6A420841 for ; Wed, 1 Aug 2018 18:19:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A6A420841 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731722AbeHAUGd (ORCPT ); Wed, 1 Aug 2018 16:06:33 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:46140 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404463AbeHATDk (ORCPT ); Wed, 1 Aug 2018 15:03:40 -0400 Received: from localhost (D57E6652.static.ziggozakelijk.nl [213.126.102.82]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 421D111F9; Wed, 1 Aug 2018 17:08:35 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tamizh chelvam , Kalle Valo , Sasha Levin Subject: [PATCH 4.17 248/336] ath10k: fix kernel panic while reading tpc_stats Date: Wed, 1 Aug 2018 18:49:43 +0200 Message-Id: <20180801165038.549593776@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180801165028.930831994@linuxfoundation.org> References: <20180801165028.930831994@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tamizh Chelvam [ Upstream commit 4b190675ad06f5a6ecbeef0b01890c5fb372e3eb ] When attempt to read tpc_stats for the chipsets which support more than 3 tx chain will trigger kernel panic(kernel stack is corrupted) due to writing values on rate_code array out of range. This patch changes the array size depends on the WMI_TPC_TX_N_CHAIN and added check to avoid write values on the array if the num tx chain get in tpc config event is greater than WMI_TPC_TX_N_CHAIN. Tested on QCA9984 with firmware-5.bin_10.4-3.5.3-00057 Kernel panic log : [ 323.510944] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: bf90c654 [ 323.510944] [ 323.524390] CPU: 0 PID: 1908 Comm: cat Not tainted 3.14.77 #31 [ 323.530224] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 323.537941] [] (show_stack) from [] (dump_stack+0x80/0xa0) [ 323.545146] [] (dump_stack) from [] (panic+0x84/0x1e4) [ 323.552000] [] (panic) from [] (__stack_chk_fail+0x10/0x14) [ 323.559350] [] (__stack_chk_fail) from [] (ath10k_wmi_event_pdev_tpc_config+0x424/0x438 [ath10k_core]) [ 323.570471] [] (ath10k_wmi_event_pdev_tpc_config [ath10k_core]) from [] (ath10k_wmi_10_4_op_rx+0x2f0/0x39c [ath10k_core]) [ 323.583047] [] (ath10k_wmi_10_4_op_rx [ath10k_core]) from [] (ath10k_htc_rx_completion_handler+0x170/0x1a0 [ath10k_core]) [ 323.595702] [] (ath10k_htc_rx_completion_handler [ath10k_core]) from [] (ath10k_pci_hif_send_complete_check+0x1f0/0x220 [ath10k_pci]) [ 323.609421] [] (ath10k_pci_hif_send_complete_check [ath10k_pci]) from [] (ath10k_ce_per_engine_service+0x74/0xc4 [ath10k_pci]) [ 323.622490] [] (ath10k_ce_per_engine_service [ath10k_pci]) from [] (ath10k_ce_per_engine_service_any+0x74/0x80 [ath10k_pci]) [ 323.635423] [] (ath10k_ce_per_engine_service_any [ath10k_pci]) from [] (ath10k_pci_napi_poll+0x44/0xe8 [ath10k_pci]) [ 323.647665] [] (ath10k_pci_napi_poll [ath10k_pci]) from [] (net_rx_action+0xac/0x160) [ 323.657208] [] (net_rx_action) from [] (__do_softirq+0x104/0x294) [ 323.665017] [] (__do_softirq) from [] (irq_exit+0x9c/0x11c) [ 323.672314] [] (irq_exit) from [] (handle_IRQ+0x6c/0x90) [ 323.679341] [] (handle_IRQ) from [] (gic_handle_irq+0x3c/0x60) [ 323.686893] [] (gic_handle_irq) from [] (__irq_svc+0x40/0x70) [ 323.694349] Exception stack(0xdd489c58 to 0xdd489ca0) [ 323.699384] 9c40: 00000000 a0000013 [ 323.707547] 9c60: 00000000 dc4bce40 60000013 ddc1d800 dd488000 00000990 00000000 c085c800 [ 323.715707] 9c80: 00000000 dd489d44 0000092d dd489ca0 c026e664 c026e668 60000013 ffffffff [ 323.723877] [] (__irq_svc) from [] (rcu_note_context_switch+0x170/0x184) [ 323.732298] [] (rcu_note_context_switch) from [] (__schedule+0x50/0x4d4) [ 323.740716] [] (__schedule) from [] (schedule_timeout+0x148/0x178) [ 323.748611] [] (schedule_timeout) from [] (wait_for_common+0x114/0x154) [ 323.756972] [] (wait_for_common) from [] (ath10k_tpc_stats_open+0xc8/0x340 [ath10k_core]) [ 323.766873] [] (ath10k_tpc_stats_open [ath10k_core]) from [] (do_dentry_open+0x1ac/0x274) [ 323.776741] [] (do_dentry_open) from [] (do_last+0x8c0/0xb08) [ 323.784201] [] (do_last) from [] (path_openat+0x210/0x598) [ 323.791408] [] (path_openat) from [] (do_filp_open+0x2c/0x78) [ 323.798873] [] (do_filp_open) from [] (do_sys_open+0x114/0x1b4) [ 323.806509] [] (do_sys_open) from [] (ret_fast_syscall+0x0/0x44) [ 323.814241] CPU1: stopping [ 323.816927] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.14.77 #31 [ 323.823008] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 323.830731] [] (show_stack) from [] (dump_stack+0x80/0xa0) [ 323.837934] [] (dump_stack) from [] (handle_IPI+0xb8/0x140) [ 323.845224] [] (handle_IPI) from [] (gic_handle_irq+0x58/0x60) [ 323.852774] [] (gic_handle_irq) from [] (__irq_svc+0x40/0x70) [ 323.860233] Exception stack(0xdd499fa0 to 0xdd499fe8) [ 323.865273] 9fa0: ffffffed 00000000 1d3c9000 00000000 dd498000 dd498030 10c0387d c08b62c8 [ 323.873432] 9fc0: 4220406a 512f04d0 00000000 00000000 00000001 dd499fe8 c021838c c0218390 [ 323.881588] 9fe0: 60000013 ffffffff [ 323.885070] [] (__irq_svc) from [] (arch_cpu_idle+0x30/0x50) [ 323.892454] [] (arch_cpu_idle) from [] (cpu_startup_entry+0xa4/0x108) [ 323.900690] [] (cpu_startup_entry) from [<422085a4>] (0x422085a4) Signed-off-by: Tamizh chelvam Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath10k/debug.c | 8 +++++++- drivers/net/wireless/ath/ath10k/wmi.c | 6 ++++++ drivers/net/wireless/ath/ath10k/wmi.h | 2 +- 3 files changed, 14 insertions(+), 2 deletions(-) --- a/drivers/net/wireless/ath/ath10k/debug.c +++ b/drivers/net/wireless/ath/ath10k/debug.c @@ -1519,7 +1519,13 @@ static void ath10k_tpc_stats_print(struc *len += scnprintf(buf + *len, buf_len - *len, "********************************\n"); *len += scnprintf(buf + *len, buf_len - *len, - "No. Preamble Rate_code tpc_value1 tpc_value2 tpc_value3\n"); + "No. Preamble Rate_code "); + + for (i = 0; i < WMI_TPC_TX_N_CHAIN; i++) + *len += scnprintf(buf + *len, buf_len - *len, + "tpc_value%d ", i); + + *len += scnprintf(buf + *len, buf_len - *len, "\n"); for (i = 0; i < tpc_stats->rate_max; i++) { *len += scnprintf(buf + *len, buf_len - *len, --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -4479,6 +4479,12 @@ void ath10k_wmi_event_pdev_tpc_config(st num_tx_chain = __le32_to_cpu(ev->num_tx_chain); + if (num_tx_chain > WMI_TPC_TX_N_CHAIN) { + ath10k_warn(ar, "number of tx chain is %d greater than TPC configured tx chain %d\n", + num_tx_chain, WMI_TPC_TX_N_CHAIN); + return; + } + ath10k_wmi_tpc_config_get_rate_code(rate_code, pream_table, num_tx_chain); --- a/drivers/net/wireless/ath/ath10k/wmi.h +++ b/drivers/net/wireless/ath/ath10k/wmi.h @@ -4008,9 +4008,9 @@ struct wmi_pdev_get_tpc_config_cmd { } __packed; #define WMI_TPC_CONFIG_PARAM 1 -#define WMI_TPC_RATE_MAX 160 #define WMI_TPC_FINAL_RATE_MAX 240 #define WMI_TPC_TX_N_CHAIN 4 +#define WMI_TPC_RATE_MAX (WMI_TPC_TX_N_CHAIN * 65) #define WMI_TPC_PREAM_TABLE_MAX 10 #define WMI_TPC_FLAG 3 #define WMI_TPC_BUF_SIZE 10