[PATCH] mct_u232: sanity checking in probe

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



An attack using the lack of sanity checking in probe
is known. This patch checks for the existance of a
second port.
CVE-2016-3136

Signed-off-by: Oliver Neukum <ONeukum@xxxxxxxx>
CC: stable@xxxxxxxxxxxxxxx

v1 - add sanity check for presence of a second port
v2 - add sanity check for an interrupt endpoint
---
 drivers/usb/serial/mct_u232.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 4446b8d..3e64538 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -378,6 +378,10 @@ static int mct_u232_port_probe(struct usb_serial_port *port)
 {
 	struct mct_u232_private *priv;
 
+	/* check first to simplify error handling */
+	if (!port->serial->port[1] || !port->serial->port[1]->interrupt_in_urb)
+		return -ENODEV;
+
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux