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Date: Sun, 11 Nov 2018 19:49:05 +0000
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org,
"Benjamin Tissoires" <benjamin.tissoires@...hat.com>,
"Tomasz Kramkowski" <tk@...-tk.com>,
"Valtteri Heikkilä" <rnd@....fi>,
"Jiri Kosina" <jkosina@...e.cz>
Subject: [PATCH 3.16 333/366] HID: reject input outside logical range only
if null state is set
3.16.61-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Valtteri Heikkilä <rnd@....fi>
commit 3f3752705dbd50b66b66ad7b4d54fe33d2f746ed upstream.
This patch fixes an issue in drivers/hid/hid-input.c where USB HID
control null state flag is not checked upon rejecting inputs outside
logical minimum-maximum range. The check should be made according to USB
HID specification 1.11, section 6.2.2.5, p.31. The fix will resolve
issues with some game controllers, such as:
https://bugzilla.kernel.org/show_bug.cgi?id=68621
[tk@...-tk.com: shortened and fixed spelling in commit message]
Signed-off-by: Valtteri Heikkilä <rnd@....fi>
Signed-off-by: Tomasz Kramkowski <tk@...-tk.com>
Acked-By: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
drivers/hid/hid-input.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1094,6 +1094,7 @@ void hidinput_hid_event(struct hid_devic
* don't specify logical min and max.
*/
if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
+ (field->flags & HID_MAIN_ITEM_NULL_STATE) &&
(field->logical_minimum < field->logical_maximum) &&
(value < field->logical_minimum ||
value > field->logical_maximum)) {
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