HID: hid-logitech-hidpp: add NULL check on devm_kmemdup() return value

GustavoARSilva · Jiri Kosina · commit 929b60a85b73 · 2017-07-20T15:45:39.000+02:00
Check return value from call to devm_kmemdup() in order to prevent a NULL
pointer dereference.

Signed-off-by: Gustavo A. R. Silva &lt;garsilva@embeddedor.com&gt;
Reviewed-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
@@ -2732,6 +2732,9 @@ static int hidpp_initialize_battery(struct hidpp_device *hidpp)
 				     hidpp_battery_props,
 				     sizeof(hidpp_battery_props),
 				     GFP_KERNEL);
+	if (!battery_props)
+		return -ENOMEM;
+
 	num_battery_props = ARRAY_SIZE(hidpp_battery_props) - 2;
 
 	if (hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_MILEAGE)
