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wifi: iwlegacy: Check rate_idx range after addition

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Limit rate_idx to IL_LAST_OFDM_RATE for 5GHz band for thinkable case
the index is incorrect.

Reported-by: Fedor Pchelkin <pchelkin@ispras.ru>
Reported-by: Alexei Safin <a.safin@rosa.ru>
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Reviewed-by: Fedor Pchelkin <pchelkin@ispras.ru>
Link: https://patch.msgid.link/20250525144524.GA172583@wp.pl
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Stanislaw Gruszka 2025-05-25 16:45:24 +02:00 committed by Johannes Berg
parent 62deb67fc5
commit 0de19d5ae0
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/intel/iwlegacy/4965-mac.c
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@ -1575,8 +1575,11 @@ il4965_tx_cmd_build_rate(struct il_priv *il,
|| rate_idx > RATE_COUNT_LEGACY)
rate_idx = rate_lowest_index(&il->bands[info->band], sta);
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == NL80211_BAND_5GHZ)
if (info->band == NL80211_BAND_5GHZ) {
rate_idx += IL_FIRST_OFDM_RATE;
if (rate_idx > IL_LAST_OFDM_RATE)
rate_idx = IL_LAST_OFDM_RATE;
}
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = il_rates[rate_idx].plcp;
/* Zero out flags for this packet */