media: stkwebcam: fix memory leak in stk_camera_probe

commit 514e97674400462cc09c459a1ddfb9bf39017223 upstream.

My local syzbot instance hit memory leak in usb_set_configuration().
The problem was in unputted usb interface. In case of errors after
usb_get_intf() the reference should be putted to correclty free memory
allocated for this interface.

Fixes: ec16dae5453e ("V4L/DVB (7019): V4L: add support for Syntek DC1125 webcams")
Cc: stable@vger.kernel.org
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index 17ee9cde41565fd5c2633cdff91d73d7172c37ae..51ac9d067acfa78e513efe8e43335fd148922734 100644 (file)
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -1353,7 +1353,7 @@ static int stk_camera_probe(struct usb_interface *interface,
        if (!dev->isoc_ep) {
                STK_ERROR("Could not find isoc-in endpoint");
                err = -ENODEV;
-               goto error;
+               goto error_put;
        }
        dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
        dev->vsettings.mode = MODE_VGA;
@@ -1366,10 +1366,12 @@ static int stk_camera_probe(struct usb_interface *interface,
 
        err = stk_register_video_device(dev);
        if (err)
-               goto error;
+               goto error_put;
 
        return 0;
 
+error_put:
+       usb_put_intf(interface);
 error:
        v4l2_ctrl_handler_free(hdl);
        v4l2_device_unregister(&dev->v4l2_dev);