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>

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index b29a981..650e1da 100644 (file)
--- 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;