diff options
| author | Badhri Jagan Sridharan <Badhri@google.com> | 2016-08-29 17:33:52 -0700 |
|---|---|---|
| committer | Mark Salyzyn <salyzyn@google.com> | 2016-09-19 15:04:13 -0700 |
| commit | 8d72f1b28690d61f74128032a171e5c2aa3c4211 (patch) | |
| tree | 186069023d57e6bcb43a98900afda0dd54b76d92 | |
| parent | 490e3c76dd44156b77f3ebf25e498894368a8621 (diff) | |
| download | tegra-8d72f1b28690d61f74128032a171e5c2aa3c4211.tar.gz | |
UPSTREAM: USB: cypress_m8: add endpoint sanity check
commit c55aee1bf0e6b6feec8b2927b43f7a09a6d5f754 upstream.
An attack using missing endpoints exists.
CVE-2016-3137
BUG: 28242610
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I1cc7957a5924175d24f12fdc41162ece67c907e5
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index 082120198f87..09f0f631389e 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -449,6 +449,11 @@ static int cypress_generic_port_probe(struct usb_serial_port *port) struct usb_serial *serial = port->serial; struct cypress_private *priv; + if (!port->interrupt_out_urb || !port->interrupt_in_urb) { + dev_err(&port->dev, "required endpoint is missing\n"); + return -ENODEV; + } + priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); if (!priv) return -ENOMEM; @@ -606,12 +611,6 @@ static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) cypress_set_termios(tty, port, &priv->tmp_termios); /* setup the port and start reading from the device */ - if (!port->interrupt_in_urb) { - dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", - __func__); - return -1; - } - usb_fill_int_urb(port->interrupt_in_urb, serial->dev, usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), port->interrupt_in_urb->transfer_buffer, |