media: radio/si470x: kill urb on error

In the probe() function radio->int_in_urb was not killed if an
error occurred in the probe sequence. It was also missing in
the disconnect.

This caused this syzbot issue:

https://syzkaller.appspot.com/bug?extid=2d4fc2a0c45ad8da7e99

Reported-and-tested-by: syzbot+2d4fc2a0c45ad8da7e99@syzkaller.appspotmail.com
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c
index 4907374..fedff68 100644 (file)
--- a/drivers/media/radio/si470x/radio-si470x-usb.c
+++ b/drivers/media/radio/si470x/radio-si470x-usb.c
@@ -734,7 +734,7 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
        /* start radio */
        retval = si470x_start_usb(radio);
        if (retval < 0)
-               goto err_all;
+               goto err_buf;
 
        /* set initial frequency */
        si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
@@ -749,6 +749,8 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
 
        return 0;
 err_all:
+       usb_kill_urb(radio->int_in_urb);
+err_buf:
        kfree(radio->buffer);
 err_ctrl:
        v4l2_ctrl_handler_free(&radio->hdl);
@@ -822,6 +824,7 @@ static void si470x_usb_driver_disconnect(struct usb_interface *intf)
        mutex_lock(&radio->lock);
        v4l2_device_disconnect(&radio->v4l2_dev);
        video_unregister_device(&radio->videodev);
+       usb_kill_urb(radio->int_in_urb);
        usb_set_intfdata(intf, NULL);
        mutex_unlock(&radio->lock);
        v4l2_device_put(&radio->v4l2_dev);