mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-11 00:44:23 -05:00
57 lines
2.1 KiB
Diff
57 lines
2.1 KiB
Diff
From b7321e81fc369abe353cf094d4f0dc2fe11ab95f Mon Sep 17 00:00:00 2001
|
|
From: Johan Hovold <johan@kernel.org>
|
|
Date: Tue, 7 Mar 2017 16:11:03 +0100
|
|
Subject: USB: iowarrior: fix NULL-deref at probe
|
|
|
|
Make sure to check for the required interrupt-in endpoint to avoid
|
|
dereferencing a NULL-pointer should a malicious device lack such an
|
|
endpoint.
|
|
|
|
Note that a fairly recent change purported to fix this issue, but added
|
|
an insufficient test on the number of endpoints only, a test which can
|
|
now be removed.
|
|
|
|
Fixes: 4ec0ef3a8212 ("USB: iowarrior: fix oops with malicious USB descriptors")
|
|
Fixes: 946b960d13c1 ("USB: add driver for iowarrior devices.")
|
|
Cc: stable <stable@vger.kernel.org> # 2.6.21
|
|
Signed-off-by: Johan Hovold <johan@kernel.org>
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/usb/misc/iowarrior.c | 13 +++++++------
|
|
1 file changed, 7 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
|
|
index 095778f..3ad058c 100644
|
|
--- a/drivers/usb/misc/iowarrior.c
|
|
+++ b/drivers/usb/misc/iowarrior.c
|
|
@@ -781,12 +781,6 @@ static int iowarrior_probe(struct usb_interface *interface,
|
|
iface_desc = interface->cur_altsetting;
|
|
dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
|
|
|
|
- if (iface_desc->desc.bNumEndpoints < 1) {
|
|
- dev_err(&interface->dev, "Invalid number of endpoints\n");
|
|
- retval = -EINVAL;
|
|
- goto error;
|
|
- }
|
|
-
|
|
/* set up the endpoint information */
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
@@ -797,6 +791,13 @@ static int iowarrior_probe(struct usb_interface *interface,
|
|
/* this one will match for the IOWarrior56 only */
|
|
dev->int_out_endpoint = endpoint;
|
|
}
|
|
+
|
|
+ if (!dev->int_in_endpoint) {
|
|
+ dev_err(&interface->dev, "no interrupt-in endpoint found\n");
|
|
+ retval = -ENODEV;
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
/* we have to check the report_size often, so remember it in the endianness suitable for our machine */
|
|
dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint);
|
|
if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) &&
|
|
--
|
|
cgit v1.1
|
|
|