[COMMON] usb: typec: check invalid accessory id

Change-Id: I243f47c1782cf59f0be9b2caf754d5bf4ba05a19
Signed-off-by: Kisang Lee <kisang80.lee@samsung.com>

diff --git a/drivers/usb/typec/typec.c b/drivers/usb/typec/typec.c
index 24e355ba109d3fc36d8bccf68a75068c295d1fc3..393c79e191d97d37bb4139313868b0cd3b14bff6 100644 (file)
--- a/drivers/usb/typec/typec.c
+++ b/drivers/usb/typec/typec.c
@@ -432,7 +432,14 @@ static ssize_t accessory_mode_show(struct device *dev,
                                   struct device_attribute *attr,
                                   char *buf)
 {
-       struct typec_partner *p = to_typec_partner(dev);
+       struct typec_partner *p;
+
+       p = to_typec_partner(dev);
+
+       if (p->accessory > TYPEC_MAX_ACCESSORY) {
+               pr_err("%s Invalid accessory number...", __func__);
+               return sprintf(buf, "%s\n", typec_accessory_modes[0]);
+       }
 
        return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
 }