From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Sender: Johan Hovold From: Johan Hovold To: Wim Van Sebroeck Cc: Guenter Roeck , linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable Subject: [PATCH] watchdog: pcwd_usb: fix NULL-deref at probe Date: Mon, 13 Mar 2017 13:49:45 +0100 Message-Id: <20170313124945.28923-1-johan@kernel.org> List-ID: Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable Signed-off-by: Johan Hovold --- drivers/watchdog/pcwd_usb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/watchdog/pcwd_usb.c b/drivers/watchdog/pcwd_usb.c index 99ebf6ea3de6..5615f4013924 100644 --- a/drivers/watchdog/pcwd_usb.c +++ b/drivers/watchdog/pcwd_usb.c @@ -630,6 +630,9 @@ static int usb_pcwd_probe(struct usb_interface *interface, return -ENODEV; } + if (iface_desc->desc.bNumEndpoints < 1) + return -ENODEV; + /* check out the endpoint: it has to be Interrupt & IN */ endpoint = &iface_desc->endpoint[0].desc; -- 2.12.0