From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130411202605.468338392@goodmis.org> Date: Thu, 11 Apr 2013 16:27:00 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ming Lei , Johan Hovold , Greg Kroah-Hartman Subject: [ 117/171 ] USB: serial: fix hang when opening port References: <20130411202503.783159048@goodmis.org> Content-Disposition: inline; filename=0117-USB-serial-fix-hang-when-opening-port.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.2 stable review patch. If anyone has any objections, please let me know. ------------------ From: Ming Lei [ Upstream commit eba0e3c3a0ba7b96f01cbe997680f6a4401a0bfc ] Johan's 'fix use-after-free in TIOCMIWAIT' patchset[1] introduces one bug which can cause kernel hang when opening port. This patch initialized the 'port->delta_msr_wait' waitqueue head to fix the bug which is introduced in 3.9-rc4. [1], http://marc.info/?l=linux-usb&m=136368139627876&w=2 Cc: stable Signed-off-by: Ming Lei Acked-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman Signed-off-by: Steven Rostedt --- drivers/usb/serial/usb-serial.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index da1e728..5f38894 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -889,6 +889,7 @@ static int usb_serial_probe(struct usb_interface *interface, port->port.ops = &serial_port_ops; port->serial = serial; spin_lock_init(&port->lock); + init_waitqueue_head(&port->delta_msr_wait); /* Keep this for private driver use for the moment but should probably go away */ INIT_WORK(&port->work, usb_serial_port_work); -- 1.7.10.4