Commit 941c4b3f authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

watchdog: pcwd_usb: fix NULL-deref at probe

commit 46c319b8 upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d8d5a02d
......@@ -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;
......
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