Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - fix gtco tablet driver, tightening parsing of HID descriptors

 - add ACPI ID added to Elan driver to be able to handle touchpads found
   in Lenovo Ideapad 320/520

 - fix the Symaptics RMI4 driver to adjust handling of buttons

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics-rmi4 - limit the range of what GPIOs are buttons
  Input: gtco - fix potential out-of-bound access
  Input: elan_i2c - add ELAN0611 to the ACPI table

Author: torvalds

drivers/input/mouse/elan_i2c_core.c

@@ -1258,6 +1258,7 @@ static const struct acpi_device_id elan_acpi_id[] = {
 	{ "ELAN0605", 0 },
 	{ "ELAN0609", 0 },
 	{ "ELAN060B", 0 },
+	{ "ELAN0611", 0 },
 	{ "ELAN1000", 0 },
 	{ }
 };

drivers/input/rmi4/rmi_f30.c

@@ -232,17 +232,18 @@ static int rmi_f30_map_gpios(struct rmi_function *fn,
 	unsigned int trackstick_button = BTN_LEFT;
 	bool button_mapped = false;
 	int i;
+	int button_count = min_t(u8, f30->gpioled_count, TRACKSTICK_RANGE_END);
 
 	f30->gpioled_key_map = devm_kcalloc(&fn->dev,
-					    f30->gpioled_count,
+					    button_count,
 					    sizeof(f30->gpioled_key_map[0]),
 					    GFP_KERNEL);
 	if (!f30->gpioled_key_map) {
 		dev_err(&fn->dev, "Failed to allocate gpioled map memory.\n");
 		return -ENOMEM;
 	}
 
-	for (i = 0; i < f30->gpioled_count; i++) {
+	for (i = 0; i < button_count; i++) {
 		if (!rmi_f30_is_valid_button(i, f30->ctrl))
 			continue;
 

drivers/input/tablet/gtco.c

@@ -230,22 +230,25 @@ static void parse_hid_report_descriptor(struct gtco *device, char * report,
 
 	/* Walk  this report and pull out the info we need */
 	while (i < length) {
-		prefix = report[i];
-
-		/* Skip over prefix */
-		i++;
+		prefix = report[i++];
 
 		/* Determine data size and save the data in the proper variable */
-		size = PREF_SIZE(prefix);
+		size = (1U << PREF_SIZE(prefix)) >> 1;
+		if (i + size > length) {
+			dev_err(ddev,
+				"Not enough data (need %d, have %d)\n",
+				i + size, length);
+			break;
+		}
+
 		switch (size) {
 		case 1:
 			data = report[i];
 			break;
 		case 2:
 			data16 = get_unaligned_le16(&report[i]);
 			break;
-		case 3:
-			size = 4;
+		case 4:
 			data32 = get_unaligned_le32(&report[i]);
 			break;
 		}