From 6e7a85d5da6bda3dcb4ecdb2306102776156e58c Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 16 Mar 2017 11:37:01 -0700 Subject: [PATCH] Input: yealink - validate number of endpoints before using them Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: ab53a87ea077 ("[PATCH] input-driver-yealink-P1K-usb-phone") Signed-off-by: Johan Hovold Cc: stable@vger.kernel.org # 2.6.14 Signed-off-by: Dmitry Torokhov --- 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 79c964c075f14..6e7ff9561d926 100644 --- a/drivers/input/misc/yealink.c +++ b/drivers/input/misc/yealink.c @@ -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; -- 2.39.5