linux-kernel - [PATCH 03/11] aiptek: Fix probable mask then right shift defects

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

Date:	Sun, 26 Oct 2014 22:24:59 -0700
From:	Joe Perches <joe@...ches.com>
To:	linux-kernel@...r.kernel.org
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org
Subject: [PATCH 03/11] aiptek: Fix probable mask then right shift defects

Precedence of & and >> is not the same and is not left to right.
shift has higher precedence and should be done after the mask.

Here the shifts are unnecessary and a non-zero value can be used
as the test to set 1 or zero.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 drivers/input/tablet/aiptek.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index e7f966d..dee2bb9 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -489,9 +489,9 @@ static void aiptek_irq(struct urb *urb)
 			 */
 			jitterable = data[1] & 0x07;
 
-			left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
-			right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
-			middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 0 ? 1 : 0;
+			left = data[1] & aiptek->curSetting.mouseButtonLeft ? 1 : 0;
+			right = data[1] & aiptek->curSetting.mouseButtonRight ? 1 : 0;
+			middle = data[1] & aiptek->curSetting.mouseButtonMiddle ? 1 : 0;
 
 			input_report_key(inputdev, BTN_LEFT, left);
 			input_report_key(inputdev, BTN_MIDDLE, middle);
-- 
2.1.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/