The function wacom_bpt3_touch_msg calls input_abs_get_res(input, ABS_MT_POSITION_X) to obtain x_res, which may equal to 0 if input->absinfo is NULL. Since x_res is used as a divisor, this may lead to divide by zero problem. Signed-off-by: Yiyuan GUO <yguoaz@xxxxxxxxxx> --- drivers/hid/wacom_wac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 81d7d12bc..a5a6fb8bc 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2892,7 +2892,7 @@ static void wacom_bpt3_touch_msg(struct wacom_wac *wacom, unsigned char *data) bool touch = data[1] & 0x80; int slot = input_mt_get_slot_by_key(input, data[0]); - if (slot < 0) + if (slot < 0 || !input->absinfo) return; touch = touch && report_touch_events(wacom); -- 2.25.1
