36 lines
1.0 KiB
Diff
36 lines
1.0 KiB
Diff
Subject: [PATCH v2] mct_u232: sanity checking in probe
|
|
From: Oliver Neukum <oneukum@suse.com>
|
|
Date: 2016-03-21 13:14:37
|
|
|
|
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@suse.com>
|
|
CC: stable@vger.kernel.org
|
|
|
|
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
|