linux-kernel - [PATCH net] wifi: rtw89: Fix array index mistake in rtw89_sta_info_get

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Message-ID: <20240703210510.11089-1-amishin@t-argos.ru>
Date: Thu, 4 Jul 2024 00:05:10 +0300
From: Aleksandr Mishin <amishin@...rgos.ru>
To: Ping-Ke Shih <pkshih@...ltek.com>
CC: Aleksandr Mishin <amishin@...rgos.ru>, Kalle Valo <kvalo@...nel.org>,
	<linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<lvc-project@...uxtesting.org>
Subject: [PATCH net] wifi: rtw89: Fix array index mistake in rtw89_sta_info_get_iter()

In rtw89_sta_info_get_iter() 'status->he_gi' is compared to array size.
But then 'rate->he_gi' is used as array index instead of 'status->he_gi'.
This can lead to go beyond array boundaries in case of 'rate->he_gi' is
not equal to 'status->he_gi' and is bigger than array size. Looks like
"copy-paste" mistake.

Fix this mistake by replacing 'rate->he_gi' with 'status->he_gi'.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: e3ec7017f6a2 ("rtw89: add Realtek 802.11ax driver")
Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>
---
 drivers/net/wireless/realtek/rtw89/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c
index affffc4092ba..5b4077c9fd28 100644
--- a/drivers/net/wireless/realtek/rtw89/debug.c
+++ b/drivers/net/wireless/realtek/rtw89/debug.c
@@ -3531,7 +3531,7 @@ static void rtw89_sta_info_get_iter(void *data, struct ieee80211_sta *sta)
 	case RX_ENC_HE:
 		seq_printf(m, "HE %dSS MCS-%d GI:%s", status->nss, status->rate_idx,
 			   status->he_gi <= NL80211_RATE_INFO_HE_GI_3_2 ?
-			   he_gi_str[rate->he_gi] : "N/A");
+			   he_gi_str[status->he_gi] : "N/A");
 		break;
 	case RX_ENC_EHT:
 		seq_printf(m, "EHT %dSS MCS-%d GI:%s", status->nss, status->rate_idx,
-- 
2.30.2