|
 |
d752a74 |
From 3620ebad64a327113bed34edefd45c3605086fc6 Mon Sep 17 00:00:00 2001
|
|
|
d752a74 |
From: Josh Boyer <jwboyer@fedoraproject.org>
|
|
|
d752a74 |
Date: Mon, 14 Mar 2016 10:38:31 -0400
|
|
|
d752a74 |
Subject: [PATCH] USB: iowarrior: fix oops with malicious USB descriptors
|
|
|
d752a74 |
|
|
|
d752a74 |
The iowarrior driver expects at least one valid endpoint. If given
|
|
|
d752a74 |
malicious descriptors that specify 0 for the number of endpoints,
|
|
|
d752a74 |
it will crash in the probe function. Ensure there is at least
|
|
|
d752a74 |
one endpoint on the interface before using it.
|
|
|
d752a74 |
|
|
|
d752a74 |
The full report of this issue can be found here:
|
|
|
d752a74 |
http://seclists.org/bugtraq/2016/Mar/87
|
|
|
d752a74 |
|
|
|
d752a74 |
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
|
|
|
d752a74 |
Cc: stable <stable@vger.kernel.org>
|
|
|
d752a74 |
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
|
|
|
d752a74 |
---
|
|
|
d752a74 |
drivers/usb/misc/iowarrior.c | 6 ++++++
|
|
|
d752a74 |
1 file changed, 6 insertions(+)
|
|
|
d752a74 |
|
|
|
d752a74 |
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
|
|
|
d752a74 |
index c6bfd13f6c92..1950e87b4219 100644
|
|
|
d752a74 |
--- a/drivers/usb/misc/iowarrior.c
|
|
|
d752a74 |
+++ b/drivers/usb/misc/iowarrior.c
|
|
|
d752a74 |
@@ -787,6 +787,12 @@ static int iowarrior_probe(struct usb_interface *interface,
|
|
|
d752a74 |
iface_desc = interface->cur_altsetting;
|
|
|
d752a74 |
dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
|
|
|
d752a74 |
|
|
|
d752a74 |
+ if (iface_desc->desc.bNumEndpoints < 1) {
|
|
|
d752a74 |
+ dev_err(&interface->dev, "Invalid number of endpoints\n");
|
|
|
d752a74 |
+ retval = -EINVAL;
|
|
|
d752a74 |
+ goto error;
|
|
|
d752a74 |
+ }
|
|
|
d752a74 |
+
|
|
|
d752a74 |
/* set up the endpoint information */
|
|
|
d752a74 |
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
|
d752a74 |
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
d752a74 |
--
|
|
|
d752a74 |
2.5.0
|
|
|
d752a74 |
|