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[media] mceusb: fix NULL-deref at probe

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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: 66e89522af ("V4L/DVB: IR: add mceusb IR receiver driver")

Cc: stable <stable@vger.kernel.org>	# 2.6.36
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Johan Hovold 2017-03-07 15:14:13 -03:00 committed by Mauro Carvalho Chehab
parent 74c839b2f5
commit 03eb2a557e
1 changed files with 2 additions and 2 deletions
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4
drivers/media/rc/mceusb.c
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@ -1288,8 +1288,8 @@ static int mceusb_dev_probe(struct usb_interface *intf,
}
}
}
if (ep_in == NULL) {
dev_dbg(&intf->dev, "inbound and/or endpoint not found");
if (!ep_in || !ep_out) {
dev_dbg(&intf->dev, "required endpoints not found\n");
return -ENODEV;
}