Messages in this thread Patch in this message | | | From | Johan Hovold <> | Subject | [PATCH] watchdog: pcwd_usb: fix NULL-deref at probe | Date | Mon, 13 Mar 2017 13:49:45 +0100 |
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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 <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> --- 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
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