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55 lines
1.7 KiB
Diff
55 lines
1.7 KiB
Diff
From 5a07975ad0a36708c6b0a5b9fea1ff811d0b0c1f Mon Sep 17 00:00:00 2001
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From: Oliver Neukum <oneukum@suse.com>
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Date: Thu, 31 Mar 2016 12:04:26 -0400
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Subject: USB: digi_acceleport: do sanity checking for the number of ports
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The driver can be crashed with devices that expose crafted descriptors
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with too few endpoints.
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See: http://seclists.org/bugtraq/2016/Mar/61
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Signed-off-by: Oliver Neukum <ONeukum@suse.com>
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[johan: fix OOB endpoint check and add error messages ]
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Cc: stable <stable@vger.kernel.org>
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Signed-off-by: Johan Hovold <johan@kernel.org>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/usb/serial/digi_acceleport.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
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index 010a42a..16e8e37 100644
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--- a/drivers/usb/serial/digi_acceleport.c
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+++ b/drivers/usb/serial/digi_acceleport.c
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@@ -1251,8 +1251,27 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
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static int digi_startup(struct usb_serial *serial)
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{
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+ struct device *dev = &serial->interface->dev;
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struct digi_serial *serial_priv;
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int ret;
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+ int i;
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+
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+ /* check whether the device has the expected number of endpoints */
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+ if (serial->num_port_pointers < serial->type->num_ports + 1) {
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+ dev_err(dev, "OOB endpoints missing\n");
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+ return -ENODEV;
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+ }
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+
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+ for (i = 0; i < serial->type->num_ports + 1 ; i++) {
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+ if (!serial->port[i]->read_urb) {
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+ dev_err(dev, "bulk-in endpoint missing\n");
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+ return -ENODEV;
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+ }
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+ if (!serial->port[i]->write_urb) {
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+ dev_err(dev, "bulk-out endpoint missing\n");
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+ return -ENODEV;
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+ }
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+ }
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serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
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if (!serial_priv)
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--
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cgit v1.1
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