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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Oliver Neukum <oneukum@suse.com>,
        syzbot+5efc10c005014d061a74@syzkaller.appspotmail.com,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 5.2 028/135] Input: iforce - add sanity checks
Date:   Thu, 22 Aug 2019 13:06:24 -0400
Message-Id: <20190822170811.13303-29-sashal@kernel.org>
In-Reply-To: <20190822170811.13303-1-sashal@kernel.org>
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From: Oliver Neukum <oneukum@suse.com>

commit 849f5ae3a513c550cad741c68dd3d7eb2bcc2a2c upstream.

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

Reported-by: syzbot+5efc10c005014d061a74@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 f1569ae8381bc..a0a686f56ac4f 100644
--- a/drivers/input/joystick/iforce/iforce-usb.c
+++ b/drivers/input/joystick/iforce/iforce-usb.c
@@ -129,7 +129,12 @@ 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