linux-kernel - [PATCH 3.5 61/96] Input: allocate absinfo data when setting ABS capability

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Message-Id: <1389623099-18783-62-git-send-email-luis.henriques@canonical.com>
Date:	Mon, 13 Jan 2014 14:24:24 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.5 61/96] Input: allocate absinfo data when setting ABS capability

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

------------------

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

commit 28a2a2e1aedbe2d8b2301e6e0e4e63f6e4177aca upstream.

We need to make sure we allocate absinfo data when we are setting one of
EV_ABS/ABS_XXX capabilities, otherwise we may bomb when we try to emit this
event.

Rested-by: Paul Cercueil <pcercuei@...il.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/input/input.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 8921c61..d56c407 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1707,6 +1707,10 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
 		break;
 
 	case EV_ABS:
+		input_alloc_absinfo(dev);
+		if (!dev->absinfo)
+			return;
+
 		__set_bit(code, dev->absbit);
 		break;
 
-- 
1.8.3.2

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