Input: egalax_ts_serial - fix potential NULL dereference on error

We didn't check input_allocate_device() for failures so it could lead to
a NULL deref.

Fixes: 6b0f8f9c52ef ('Input: add eGalaxTouch serial touchscreen driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/egalax_ts_serial.c b/drivers/input/touchscreen/egalax_ts_serial.c
index a078c1c..657bbae 100644 (file)
--- a/drivers/input/touchscreen/egalax_ts_serial.c
+++ b/drivers/input/touchscreen/egalax_ts_serial.c
@@ -105,7 +105,7 @@ static int egalax_connect(struct serio *serio, struct serio_driver *drv)
 
        egalax = kzalloc(sizeof(struct egalax), GFP_KERNEL);
        input_dev = input_allocate_device();
-       if (!egalax) {
+       if (!egalax || !input_dev) {
                error = -ENOMEM;
                goto err_free_mem;
        }