netdev - [PATCH AUTOSEL 5.4 097/130] rtlwifi: rtl8192de: fix ofdm power compensation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20201223021813.2791612-97-sashal@kernel.org>
Date:   Tue, 22 Dec 2020 21:17:40 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Ping-Ke Shih <pkshih@...ltek.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 097/130] rtlwifi: rtl8192de: fix ofdm power compensation

From: Ping-Ke Shih <pkshih@...ltek.com>

[ Upstream commit 3f79e541593fecc2a90687eb7162e15a499caa33 ]

ofdm_index[] is used to indicate how many power compensation is needed to
current thermal value. For internal PA module or 2.4G band, the min_index
is different from other cases.

This issue originally is reported by Dan. He found the size of ofdm_index[]
is 2, but access index 'i' may be equal to 2 if 'rf' is 2 in case of
'is2t'.

In fact, the chunk of code is added to wrong place, so move it back to
proper place, and then power compensation and buffer overflow are fixed.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Ping-Ke Shih <pkshih@...ltek.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20201207031903.7599-1-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c
index 71f3b6b5d7bd9..5baa1b127fff0 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c
@@ -986,18 +986,19 @@ static void rtl92d_dm_txpower_tracking_callback_thermalmeter(
 			 rtlpriv->dm.cck_index);
 	}
 	for (i = 0; i < rf; i++) {
-		if (ofdm_index[i] > OFDM_TABLE_SIZE_92D - 1)
+		if (ofdm_index[i] > OFDM_TABLE_SIZE_92D - 1) {
 			ofdm_index[i] = OFDM_TABLE_SIZE_92D - 1;
-		else if (ofdm_index[i] < ofdm_min_index)
+		} else if (internal_pa ||
+			   rtlhal->current_bandtype == BAND_ON_2_4G) {
+			if (ofdm_index[i] < ofdm_min_index_internal_pa)
+				ofdm_index[i] = ofdm_min_index_internal_pa;
+		} else if (ofdm_index[i] < ofdm_min_index) {
 			ofdm_index[i] = ofdm_min_index;
+		}
 	}
 	if (rtlhal->current_bandtype == BAND_ON_2_4G) {
 		if (cck_index > CCK_TABLE_SIZE - 1) {
 			cck_index = CCK_TABLE_SIZE - 1;
-		} else if (internal_pa ||
-			   rtlhal->current_bandtype == BAND_ON_2_4G) {
-			if (ofdm_index[i] < ofdm_min_index_internal_pa)
-				ofdm_index[i] = ofdm_min_index_internal_pa;
 		} else if (cck_index < 0) {
 			cck_index = 0;
 		}
-- 
2.27.0