This is a note to let you know that I've just added the patch titled watchdog: pcwd_usb: fix NULL-deref at probe to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: watchdog-pcwd_usb-fix-null-deref-at-probe.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 46c319b848268dab3f0e7c4a5b6e9146d3bca8a4 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Mon, 13 Mar 2017 13:49:45 +0100 Subject: watchdog: pcwd_usb: fix NULL-deref at probe From: Johan Hovold <johan@xxxxxxxxxx> commit 46c319b848268dab3f0e7c4a5b6e9146d3bca8a4 upstream. 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") Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/watchdog/pcwd_usb.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/watchdog/pcwd_usb.c +++ b/drivers/watchdog/pcwd_usb.c @@ -630,6 +630,9 @@ static int usb_pcwd_probe(struct usb_int 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; Patches currently in stable-queue which might be from johan@xxxxxxxxxx are queue-4.9/watchdog-pcwd_usb-fix-null-deref-at-probe.patch