Commit a4887ea5 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

USB: idmouse: fix NULL-deref at probe

commit b0addd3f 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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 21e0621e
......@@ -346,6 +346,9 @@ static int idmouse_probe(struct usb_interface *interface,
if (iface_desc->desc.bInterfaceClass != 0x0A)
return -ENODEV;
if (iface_desc->desc.bNumEndpoints < 1)
return -ENODEV;
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
......
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