netdev - [PATCH 2/2] rtl8xxxu: Fix for bogus data used to determine macpower

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>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161030102112.GA5789@cube>
Date:   Sun, 30 Oct 2016 20:21:12 +1000
From:   John Heenan <john@...s.com>
To:     Jes Sorensen <Jes.Sorensen@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] rtl8xxxu: Fix for bogus data used to determine macpower

Code tests show data returned by rtl8xxxu_read8(priv, REG_CR), used to set
macpower, is never 0xea. It is only ever 0x01 (first time after modprobe)
using wpa_supplicant and 0x00 thereafter using wpa_supplicant. These results
occurs with 'Fix for authentication failure' [PATCH 1/2] in place.

Whatever was returned, code tests always showed that at least
rtl8xxxu_init_queue_reserved_page(priv);
is always required. Not called if macpower set to true.

Please see cover letter, [PATCH 0/2], for more information from tests.

For rtl8xxxu-devel branch of git.kernel.org/pub/scm/linux/kernel/git/jes/linux.git

Signed-off-by: John Heenan <john@...s.com>
---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index f25b4df..aae05f3 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -3904,6 +3904,7 @@ static int rtl8xxxu_init_device(struct ieee80211_hw *hw)
 		macpower = false;
 	else
 		macpower = true;
+	macpower = false; // Code testing shows macpower must always be set to false to avoid failure

 	ret = fops->power_on(priv);
 	if (ret < 0) {
-- 
2.10.1