diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-13 13:47:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:41:24 +0200 |
| commit | 21e0621e3cd7d046715c1cbcbe70ecd34ddd5208 (patch) | |
| tree | b6e3315c3c99ba8841125e293c40e0f18cdcea46 | |
| parent | e4942716bb78231e29944bc89dc8a0ee42d07748 (diff) | |
USB: lvtest: fix NULL-deref at probe
commit 1dc56c52d2484be09c7398a5207d6b11a4256be9 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should the probed device lack endpoints.
Note that this driver does not bind to any devices by default.
Fixes: ce21bfe603b3 ("USB: Add LVS Test device driver")
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/misc/lvstest.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c index 77176511658f..d3d124753266 100644 --- a/drivers/usb/misc/lvstest.c +++ b/drivers/usb/misc/lvstest.c @@ -366,6 +366,10 @@ static int lvs_rh_probe(struct usb_interface *intf, hdev = interface_to_usbdev(intf); desc = intf->cur_altsetting; + + if (desc->desc.bNumEndpoints < 1) + return -ENODEV; + endpoint = &desc->endpoint[0].desc; /* valid only for SS root hub */ |