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wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()

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TID getting from ieee80211_get_tid() might be out of range of array size
of sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise,
UBSAN warn:

 UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30
 index 10 is out of range for type 'rtl_tid_data [9]'

Fixes: 8ca4cdef9329 ("wifi: rtlwifi: rtl8192cu: Fix TX aggregation")
Signed-off-by: Morning Star <alexbestoso@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/1764232628-13625-1-git-send-email-pkshih@realtek.com
This commit is contained in:
Morning Star 2025-11-27 16:37:08 +08:00 committed by Ping-Ke Shih
parent f3ccdfda34
commit dd39edb445
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c
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@ -511,7 +511,8 @@ void rtl92cu_tx_fill_desc(struct ieee80211_hw *hw,
if (sta) {
sta_entry = (struct rtl_sta_info *)sta->drv_priv;
tid = ieee80211_get_tid(hdr);
agg_state = sta_entry->tids[tid].agg.agg_state;
if (tid < MAX_TID_COUNT)
agg_state = sta_entry->tids[tid].agg.agg_state;
ampdu_density = sta->deflink.ht_cap.ampdu_density;
}