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10 changes: 10 additions & 0 deletions 4.18/wacom_wac.c
Original file line number Diff line number Diff line change
Expand Up @@ -1224,10 +1224,20 @@ static int wacom_intuos_bt_irq(struct wacom_wac *wacom, size_t len)

switch (data[0]) {
case 0x04:
if (len < 32) {
dev_warn(wacom->pen_input->dev.parent,
"Report 0x04 too short: %zu bytes\n", len);
break;
}
wacom_intuos_bt_process_data(wacom, data + i);
i += 10;
fallthrough;
case 0x03:
if (i == 1 && len < 22) {
dev_warn(wacom->pen_input->dev.parent,
"Report 0x03 too short: %zu bytes\n", len);
break;
}
wacom_intuos_bt_process_data(wacom, data + i);
i += 10;
wacom_intuos_bt_process_data(wacom, data + i);
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