linux-kernel - [PATCH 3.2 008/152] Input: xpad - validate USB endpoint count during probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <lsq.1479082447.713135524@decadent.org.uk>
Date:   Mon, 14 Nov 2016 00:14:07 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Dmitry Torokhov" <dmitry.torokhov@...il.com>,
        "Cameron Gutman" <aicommander@...il.com>
Subject: [PATCH 3.2 008/152] Input: xpad - validate USB endpoint count
 during probe

3.2.84-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Cameron Gutman <aicommander@...il.com>

commit caca925fca4fb30c67be88cacbe908eec6721e43 upstream.

This prevents a malicious USB device from causing an oops.

Signed-off-by: Cameron Gutman <aicommander@...il.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/input/joystick/xpad.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -825,6 +825,9 @@ static int xpad_probe(struct usb_interfa
 	struct usb_endpoint_descriptor *ep_irq_in;
 	int i, error;
 
+	if (intf->cur_altsetting->desc.bNumEndpoints != 2)
+		return -ENODEV;
+
 	for (i = 0; xpad_device[i].idVendor; i++) {
 		if ((le16_to_cpu(udev->descriptor.idVendor) == xpad_device[i].idVendor) &&
 		    (le16_to_cpu(udev->descriptor.idProduct) == xpad_device[i].idProduct))