5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anjaneyulu <pagadala.yesu.anjaneyulu@xxxxxxxxx> 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 then MCS_9_INDEX. Signed-off-by: Anjaneyulu <pagadala.yesu.anjaneyulu@xxxxxxxxx> Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx> Link: https://lore.kernel.org/r/20230614123447.79f16b3aef32.If1137f894775d6d07b78cbf3a6163ffce6399507@changeid Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/dvm/rs.c | 7 +++++-- drivers/net/wireless/intel/iwlwifi/mvm/rs.c | 9 ++++++--- 2 files changed, 11 insertions(+), 5 deletions(-) --- a/drivers/net/wireless/intel/iwlwifi/dvm/rs.c +++ b/drivers/net/wireless/intel/iwlwifi/dvm/rs.c @@ -130,7 +130,7 @@ static int iwl_hwrate_to_plcp_idx(u32 ra return idx; } - return -1; + return IWL_RATE_INVALID; } static void rs_rate_scale_perform(struct iwl_priv *priv, @@ -3151,7 +3151,10 @@ static ssize_t rs_sta_dbgfs_scale_table_ 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); --- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c @@ -1120,10 +1120,13 @@ static void rs_get_lower_rate_down_colum 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 */
