linux-kernel - [PATCH 3.12 86/94] Input: fix defuzzing logic

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]

Message-Id: <e4bd405b570f7e5132e4117b07a544fb6e5f6295.1406722270.git.jslaby@suse.cz>
Date:	Wed, 30 Jul 2014 14:15:15 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Dmitry Torokhov <dtor@...omium.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 86/94] Input: fix defuzzing logic

From: Dmitry Torokhov <dtor@...omium.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 50c5d36dab930b1f1b1e3348b8608aa8b9ee7610 upstream.

We attempt to remove noise from coordinates reported by devices in
input_handle_abs_event(), unfortunately, unless we were dropping the
event altogether, we were ignoring the adjusted value and were passing
on the original value instead.

Reviewed-by: Andrew de los Reyes <adlr@...omium.org>
Reviewed-by: Benson Leung <bleung@...omium.org>
Reviewed-by: David Herrmann <dh.herrmann@...il.com>
Reviewed-by: Henrik Rydberg <rydberg@...omail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/input/input.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 74f47980117b..fcf77af28866 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -257,9 +257,10 @@ static int input_handle_abs_event(struct input_dev *dev,
 }
 
 static int input_get_disposition(struct input_dev *dev,
-			  unsigned int type, unsigned int code, int value)
+			  unsigned int type, unsigned int code, int *pval)
 {
 	int disposition = INPUT_IGNORE_EVENT;
+	int value = *pval;
 
 	switch (type) {
 
@@ -357,6 +358,7 @@ static int input_get_disposition(struct input_dev *dev,
 		break;
 	}
 
+	*pval = value;
 	return disposition;
 }
 
@@ -365,7 +367,7 @@ static void input_handle_event(struct input_dev *dev,
 {
 	int disposition;
 
-	disposition = input_get_disposition(dev, type, code, value);
+	disposition = input_get_disposition(dev, type, code, &value);
 
 	if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event)
 		dev->event(dev, type, code, value);
-- 
2.0.1

--
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/