From: Johan Hovold <johan@xxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 5cc4a1a9f5c179795c8a1f2b0f4361829d6a070e upstream.
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@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/input/misc/yealink.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/input/misc/yealink.c b/drivers/input/misc/yealink.c
index 285a5bd6cbc9..3b6fdb389a2d 100644
--- a/drivers/input/misc/yealink.c
+++ b/drivers/input/misc/yealink.c
@@ -876,6 +876,10 @@ 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;
--
2.12.2