3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "[email protected]" <[email protected]>

commit 5d5440a835710d09f0ef18da5000541ec98b537a upstream.

URB unlinking is always racing with its completion and tx_complete
may be called before or during running usb_unlink_urb, so tx_complete
must not clear urb->dev since it will be used in unlink path,
otherwise invalid memory accesses or usb device leak may be caused
inside usb_unlink_urb.

Cc: Alan Stern <[email protected]>
Cc: Oliver Neukum <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/net/usb/usbnet.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1033,7 +1033,6 @@ static void tx_complete (struct urb *urb
        }
 
        usb_autopm_put_interface_async(dev->intf);
-       urb->dev = NULL;
        entry->state = tx_done;
        defer_bh(dev, skb, &dev->txq);
 }


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