radio_si470x: Fix free memory corruption

The release path for a disconnected device frees the object then unlocks
the mutex in the freed object...

Found by Dan Carpenter using Smatch

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c
index 92c2977..bd945d0 100644 (file)
--- a/drivers/media/radio/radio-si470x.c
+++ b/drivers/media/radio/radio-si470x.c
@@ -1200,7 +1200,7 @@ static int si470x_fops_release(struct file *file)
                        video_unregister_device(radio->videodev);
                        kfree(radio->buffer);
                        kfree(radio);
-                       goto unlock;
+                       goto done;
                }
 
                /* stop rds reception */