From: Kisang Lee <kisang80.lee@samsung.com>
Date: Mon, 25 Jun 2018 05:36:04 +0000 (+0900)
Subject: [COMMON] usb: typec: check invalid accessory id
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6ff144ae87a71fad6e2b80ffa35a3fb7754ef1ee;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[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 24e355ba109d..393c79e191d9 100644
--- 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]);
 }