Input: allocate absinfo data when setting ABS capability
authorDmitry Torokhov <dmitry.torokhov@gmail.com>
Fri, 27 Dec 2013 01:44:29 +0000 (17:44 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Jan 2014 20:24:24 +0000 (12:24 -0800)
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@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/input/input.c

index c044699..66984e2 100644 (file)
@@ -1866,6 +1866,10 @@ 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;