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Use updated version of digiport CVE fix

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This commit is contained in:
Josh Boyer 2016-03-22 14:09:20 -04:00
parent ae683f28f5
commit 12fb1ce4b0
1 changed files with 47 additions and 11 deletions
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58
digi_acceleport-do-sanity-checking-for-the-number-of.patch
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@ -1,7 +1,7 @@
From e9c2a3972496927631a1a98fef43e9538e9fd5d5 Mon Sep 17 00:00:00 2001 From e9c2a3972496927631a1a98fef43e9538e9fd5d5 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@suse.com> From: Oliver Neukum <oneukum@suse.com>
Date: Mon, 14 Mar 2016 15:53:38 +0100 Date: Mon, 14 Mar 2016 15:53:38 +0100
Subject: [PATCH] digi_acceleport: do sanity checking for the number of ports Subject: [PATCH v2] digi_acceleport: do sanity checking for the number of ports
The driver can be crashed with devices that expose crafted The driver can be crashed with devices that expose crafted
descriptors with too few endpoints. descriptors with too few endpoints.
@ -9,26 +9,62 @@ See:
http://seclists.org/bugtraq/2016/Mar/61 http://seclists.org/bugtraq/2016/Mar/61
Signed-off-by: Oliver Neukum <ONeukum@suse.com> Signed-off-by: Oliver Neukum <ONeukum@suse.com>
v1 - added sanity checks
v2 - moved them to probe() to fix problems Johan pointed out
--- ---
drivers/usb/serial/digi_acceleport.c | 5 +++++ drivers/usb/serial/digi_acceleport.c | 24 +++++++++++++++++++-----
1 file changed, 5 insertions(+) 1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 12b0e67473ba..c4d4d4547d40 100644 index 12b0e67..dab1dcf 100644
--- a/drivers/usb/serial/digi_acceleport.c --- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c
@@ -1260,6 +1260,11 @@ static int digi_startup(struct usb_serial *serial) @@ -1252,7 +1252,8 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
static int digi_startup(struct usb_serial *serial)
{
struct digi_serial *serial_priv;
- int ret;
+ int ret = -ENODEV;
+ int i;
serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
if (!serial_priv)
@@ -1260,18 +1261,31 @@ static int digi_startup(struct usb_serial *serial)
spin_lock_init(&serial_priv->ds_serial_lock); spin_lock_init(&serial_priv->ds_serial_lock);
serial_priv->ds_oob_port_num = serial->type->num_ports; serial_priv->ds_oob_port_num = serial->type->num_ports;
+ if (!(serial_priv->ds_oob_port_num == 2 && serial->type == &digi_acceleport_2_device) +
+ && !(serial_priv->ds_oob_port_num == 4 && serial->type == &digi_acceleport_4_device)) { + /* Check whether the expected number of ports matches the device */
+ kfree(serial_priv); + if (serial->num_ports < serial_priv->ds_oob_port_num)
+ return -EINVAL; + goto error;
+ /* all features must be present */
+ for (i = 0; i < serial->type->num_ports + 1 ; i++) {
+ if (!serial->port[i]->read_urb)
+ goto error;
+ if (!serial->port[i]->write_urb)
+ goto error;
+ } + }
+
serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num];
ret = digi_port_init(serial_priv->ds_oob_port, ret = digi_port_init(serial_priv->ds_oob_port,
-- serial_priv->ds_oob_port_num);
2.5.0 - if (ret) {
- kfree(serial_priv);
- return ret;
- }
+ if (ret)
+ goto error;
usb_set_serial_data(serial, serial_priv);
return 0;
+error:
+ kfree(serial_priv);
+ return ret;
}
--
2.1.4