Commit 55e9d947 authored by Johan Hovold's avatar Johan Hovold Committed by Sasha Levin

[media] mceusb: fix NULL-deref at probe

[ Upstream commit 03eb2a55 ]

Make sure to check for the required out endpoint to avoid dereferencing
a NULL-pointer in mce_request_packet should a malicious device lack such
an endpoint. Note that this path is hit during probe.

Fixes: 66e89522 ("V4L/DVB: IR: add mceusb IR receiver driver")

Cc: stable <stable@vger.kernel.org>	# 2.6.36
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 91848cdb
...@@ -1321,8 +1321,8 @@ static int mceusb_dev_probe(struct usb_interface *intf, ...@@ -1321,8 +1321,8 @@ static int mceusb_dev_probe(struct usb_interface *intf,
} }
} }
} }
if (ep_in == NULL) { if (!ep_in || !ep_out) {
dev_dbg(&intf->dev, "inbound and/or endpoint not found"); dev_dbg(&intf->dev, "required endpoints not found\n");
return -ENODEV; return -ENODEV;
} }
......
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