Commit 6585effe authored by Johan Hovold's avatar Johan Hovold Committed by Sasha Levin

Input: cm109 - validate number of endpoints before using them

[ Upstream commit ac2ee9ba ]

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.

Fixes: c04148f9 ("Input: add driver for USB VoIP phones with CM109...")
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Cc: stable@vger.kernel.org	# 2.6.28
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 76d98101
......@@ -675,6 +675,10 @@ static int cm109_usb_probe(struct usb_interface *intf,
int error = -ENOMEM;
interface = intf->cur_altsetting;
if (interface->desc.bNumEndpoints < 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint))
......
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