USB: cdc-wdm: fix memory leak

cleanup() is not called if the last close() comes after
disconnect(). That leads to a memory leak. Rectified
by checking for an earlier disconnect() in release()

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index b29a9815e4d2..650e1da4d2bf 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -622,6 +622,8 @@ static int wdm_release(struct inode *inode, struct file *file)
                 kill_urbs(desc);
                 if (!test_bit(WDM_DISCONNECTING, &desc->flags))
                         desc->manage_power(desc->intf, 0);
+                else
+                        cleanup(desc);
         }
         mutex_unlock(&wdm_mutex);
         return 0;