From: Anjaneyulu pagadala.yesu.anjaneyulu@intel.com

commit efbe8f81952fe469d38655744627d860879dcde8 upstream.

Validate index before access iwl_rate_mcs to keep rate->index inside the valid boundaries. Use MCS_0_INDEX if index is less than MCS_0_INDEX and MCS_9_INDEX if index is greater than MCS_9_INDEX.

Signed-off-by: Anjaneyulu pagadala.yesu.anjaneyulu@intel.com Signed-off-by: Gregory Greenman gregory.greenman@intel.com Link: https://lore.kernel.org/r/20230614123447.79f16b3aef32.If1137f894775d6d07b78c... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Dmitry Antipov dmantipov@yandex.ru --- v2: (re)adjust copyright notice --- drivers/net/wireless/intel/iwlwifi/dvm/rs.c | 9 ++++++--- drivers/net/wireless/intel/iwlwifi/mvm/rs.c | 11 +++++++---- 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/rs.c b/drivers/net/wireless/intel/iwlwifi/dvm/rs.c index 687c906a9d72..4b1f006c105b 100644 --- a/drivers/net/wireless/intel/iwlwifi/dvm/rs.c +++ b/drivers/net/wireless/intel/iwlwifi/dvm/rs.c @@ -2,7 +2,7 @@ /****************************************************************************** * * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. - * Copyright (C) 2019 - 2020, 2022 Intel Corporation + * Copyright (C) 2019 - 2020, 2022 - 2023 Intel Corporation *****************************************************************************/ #include <linux/kernel.h> #include <linux/skbuff.h> @@ -125,7 +125,7 @@ static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) return idx; }

- return -1; + return IWL_RATE_INVALID; }

static void rs_rate_scale_perform(struct iwl_priv *priv, @@ -3146,7 +3146,10 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { index = iwl_hwrate_to_plcp_idx( le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); - if (is_legacy(tbl->lq_type)) { + if (index == IWL_RATE_INVALID) { + desc += sprintf(buff + desc, " rate[%d] 0x%X invalid rate\n", + i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); + } else if (is_legacy(tbl->lq_type)) { desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), iwl_rate_mcs[index].mbps); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c index 2be6801d48ac..ef9ecc4650d1 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /****************************************************************************** * - * Copyright(c) 2005 - 2014, 2018 - 2021 Intel Corporation. All rights reserved. + * Copyright(c) 2005 - 2014, 2018 - 2023 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * Copyright(c) 2016 - 2017 Intel Deutschland GmbH *****************************************************************************/ @@ -1072,10 +1072,13 @@ static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,

rate->bw = RATE_MCS_CHAN_WIDTH_20;

- WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || - rate->index > IWL_RATE_MCS_9_INDEX); + if (WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX)) + rate->index = rs_ht_to_legacy[IWL_RATE_MCS_0_INDEX]; + else if (WARN_ON_ONCE(rate->index > IWL_RATE_MCS_9_INDEX)) + rate->index = rs_ht_to_legacy[IWL_RATE_MCS_9_INDEX]; + else + rate->index = rs_ht_to_legacy[rate->index];

- rate->index = rs_ht_to_legacy[rate->index]; rate->ldpc = false; } else { /* Downgrade to SISO with same MCS if in MIMO */