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Input: yealink - validate number of endpoints before using them

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

Fixes: aca951a22a1d ("[PATCH] input-driver-yealink-P1K-usb-phone")
Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: stable@vger.kernel.org	# 2.6.14
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Johan Hovold 2017-03-16 11:37:01 -07:00 committed by Dmitry Torokhov
parent 1916d31927
commit 5cc4a1a9f5
1 changed files with 4 additions and 0 deletions
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4
drivers/input/misc/yealink.c
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@ -875,6 +875,10 @@ static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
int ret, pipe, i;
interface = intf->cur_altsetting;
if (interface->desc.bNumEndpoints < 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint))
return -ENODEV;