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USB: lvtest: fix NULL-deref at probe

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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: ce21bfe603 ("USB: Add LVS Test device driver")
Cc: stable <stable@vger.kernel.org>     # 3.17
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-03-13 13:47:49 +01:00 committed by Greg Kroah-Hartman
parent b0addd3fa6
commit 1dc56c52d2
1 changed files with 4 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/usb/misc/lvstest.c
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@ -366,6 +366,10 @@ static int lvs_rh_probe(struct usb_interface *intf,
hdev = interface_to_usbdev(intf); hdev = interface_to_usbdev(intf);
desc = intf->cur_altsetting; desc = intf->cur_altsetting;
if (desc->desc.bNumEndpoints < 1)
return -ENODEV;
endpoint = &desc->endpoint[0].desc; endpoint = &desc->endpoint[0].desc;
/* valid only for SS root hub */ /* valid only for SS root hub */