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wifi: iwlwifi: add a few rate index validity checks

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commit efbe8f8195 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@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230614123447.79f16b3aef32.If1137f894775d6d07b78cbf3a6163ffce6399507@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Anjaneyulu
2023-06-14 12:41:37 +03:00
committed by Greg Kroah-Hartman
parent 81d4dd05c4
commit 091a023cf2
2 changed files with 11 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/wireless/intel/iwlwifi/dvm/rs.c
+5 -2
View File
@@ -130,7 +130,7 @@ 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,
@@ -3151,7 +3151,10 @@ 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);
drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+6 -3
View File
@@ -1119,10 +1119,13 @@ 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 */