[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20190814021548.16001-35-sashal@kernel.org>
Date: Tue, 13 Aug 2019 22:15:13 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>,
syzbot+c7df50363aaff50aa363@...kaller.appspotmail.com,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Sasha Levin <sashal@...nel.org>, linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 35/68] Input: kbtab - sanity check for endpoint type
From: Oliver Neukum <oneukum@...e.com>
[ Upstream commit c88090dfc84254fa149174eb3e6a8458de1912c4 ]
The driver should check whether the endpoint it uses has the correct
type.
Reported-by: syzbot+c7df50363aaff50aa363@...kaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@...e.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/input/tablet/kbtab.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c
index 75b500651e4e4..b1cf0c9712740 100644
--- a/drivers/input/tablet/kbtab.c
+++ b/drivers/input/tablet/kbtab.c
@@ -116,6 +116,10 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i
if (intf->cur_altsetting->desc.bNumEndpoints < 1)
return -ENODEV;
+ endpoint = &intf->cur_altsetting->endpoint[0].desc;
+ if (!usb_endpoint_is_int_in(endpoint))
+ return -ENODEV;
+
kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
input_dev = input_allocate_device();
if (!kbtab || !input_dev)
@@ -154,8 +158,6 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i
input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
- endpoint = &intf->cur_altsetting->endpoint[0].desc;
-
usb_fill_int_urb(kbtab->irq, dev,
usb_rcvintpipe(dev, endpoint->bEndpointAddress),
kbtab->data, 8,
--
2.20.1
Powered by blists - more mailing lists