linux-kernel - [PATCH AUTOSEL 4.4 22/28] Input: iforce

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Message-Id: <20190814022550.17463-22-sashal@kernel.org>
Date:   Tue, 13 Aug 2019 22:25:44 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Oliver Neukum <oneukum@...e.com>,
        syzbot+5efc10c005014d061a74@...kaller.appspotmail.com,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sasha Levin <sashal@...nel.org>, linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 4.4 22/28] Input: iforce - add sanity checks

From: Oliver Neukum <oneukum@...e.com>

[ Upstream commit 849f5ae3a513c550cad741c68dd3d7eb2bcc2a2c ]

The endpoint type should also be checked before a device
is accepted.

Reported-by: syzbot+5efc10c005014d061a74@...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/joystick/iforce/iforce-usb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/input/joystick/iforce/iforce-usb.c b/drivers/input/joystick/iforce/iforce-usb.c
index db64adfbe1aff..3e1ea912b41d1 100644
--- a/drivers/input/joystick/iforce/iforce-usb.c
+++ b/drivers/input/joystick/iforce/iforce-usb.c
@@ -145,7 +145,12 @@ static int iforce_usb_probe(struct usb_interface *intf,
 		return -ENODEV;
 
 	epirq = &interface->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(epirq))
+		return -ENODEV;
+
 	epout = &interface->endpoint[1].desc;
+	if (!usb_endpoint_is_int_out(epout))
+		return -ENODEV;
 
 	if (!(iforce = kzalloc(sizeof(struct iforce) + 32, GFP_KERNEL)))
 		goto fail;
-- 
2.20.1