[PATCH 4.9 096/139] media: ati_remote: sanity check for both endpoints

From: Greg Kroah-Hartman
Date: Tue Oct 27 2020 - 10:06:17 EST


From: Oliver Neukum <oneukum@xxxxxxxx>

[ Upstream commit a8be80053ea74bd9c3f9a3810e93b802236d6498 ]

If you do sanity checks, you should do them for both endpoints.
Hence introduce checking for endpoint type for the output
endpoint, too.

Reported-by: syzbot+998261c2ae5932458f6c@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx>
Signed-off-by: Sean Young <sean@xxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/rc/ati_remote.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/media/rc/ati_remote.c b/drivers/media/rc/ati_remote.c
index 9f5b59706741c..7f98db4bc0277 100644
--- a/drivers/media/rc/ati_remote.c
+++ b/drivers/media/rc/ati_remote.c
@@ -850,6 +850,10 @@ static int ati_remote_probe(struct usb_interface *interface,
err("%s: endpoint_in message size==0? \n", __func__);
return -ENODEV;
}
+ if (!usb_endpoint_is_int_out(endpoint_out)) {
+ err("%s: Unexpected endpoint_out\n", __func__);
+ return -ENODEV;
+ }

ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
rc_dev = rc_allocate_device();
--
2.25.1