diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 20ac60d6b6a8..940d163788a8 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -401,7 +401,7 @@ static ssize_t dwc3_mode_write(struct file *file,
 	struct dwc3		*dwc = s->private;
 	unsigned long		flags;
 	u32			mode = 0;
-	char			buf[32];
+	char buf[32] = {};
 
 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 		return -EFAULT;
@@ -481,7 +481,7 @@ static ssize_t dwc3_testmode_write(struct file *file,
 	struct dwc3		*dwc = s->private;
 	unsigned long		flags;
 	u32			testmode = 0;
-	char			buf[32];
+	char			buf[32] = {};
 
 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 		return -EFAULT;
@@ -588,7 +588,7 @@ static ssize_t dwc3_link_state_write(struct file *file,
 	struct dwc3		*dwc = s->private;
 	unsigned long		flags;
 	enum dwc3_link_state	state = 0;
-	char			buf[32];
+	char			buf[32] = {};
 
 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 		return -EFAULT;
@@ -629,12 +629,10 @@ static ssize_t dwc3_store_ep_num(struct file *file, const char __user *ubuf,
 {
 	struct seq_file		*s = file->private_data;
 	struct dwc3		*dwc = s->private;
-	char			kbuf[10];
+	char			kbuf[10] = {};
 	unsigned int		num, dir, temp;
 	unsigned long		flags;
 
-	memset(kbuf, 0, 10);
-
 	if (copy_from_user(kbuf, ubuf, count > 10 ? 10 : count))
 		return -EFAULT;