Commit 8d729b51 authored by Johan Hovold's avatar Johan Hovold Committed by Jiri Slaby

Input: yealink - validate number of endpoints before using them

commit 5cc4a1a9 upstream.

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

Fixes: aca951a2 ("[PATCH] input-driver-yealink-P1K-usb-phone")
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent 006c0207
...@@ -876,6 +876,10 @@ static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id) ...@@ -876,6 +876,10 @@ static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
int ret, pipe, i; int ret, pipe, i;
interface = intf->cur_altsetting; interface = intf->cur_altsetting;
if (interface->desc.bNumEndpoints < 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc; endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint)) if (!usb_endpoint_is_int_in(endpoint))
return -ENODEV; return -ENODEV;
......
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