linux-kernel - [PATCH] media: uvcvideo: Modified uvc_ctrl_fill_xu

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Message-Id: <20230915161213.42503-1-jerry.liu@technexion.com>
Date:   Fri, 15 Sep 2023 09:12:14 -0700
From:   Jerry Liu <jerry.liu@...hnexion.com>
To:     laurent.pinchart@...asonboard.com
Cc:     mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jerry Liu <jerry.liu@...hnexion.com>
Subject: [PATCH] media: uvcvideo: Modified uvc_ctrl_fill_xu_info 'kmalloc' to 'kzalloc'

If the request length of UVC XU is 1 (even though this is illegal), due
to 'data' may be the non-zero value, UVC_GET_LEN could potentially result
in a length that is not 1 because of the high byte is not zero. In order
to ensure that 2-byte data array is set to 0, 'kmalloc' is modified to 'kzalloc'.

Signed-off-by: Jerry Liu <jerry.liu@...hnexion.com>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 5e9d3da862dd..054bc14f7a58 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -2088,7 +2088,7 @@ static int uvc_ctrl_fill_xu_info(struct uvc_device *dev,
 	u8 *data;
 	int ret;
 
-	data = kmalloc(2, GFP_KERNEL);
+	data = kzalloc(2, GFP_KERNEL);
 	if (data == NULL)
 		return -ENOMEM;
 
-- 
2.25.1