| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 39/88] USB: lvtest: fix NULL-deref at probe | Date | Tue, 28 Mar 2017 14:30:54 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold <johan@kernel.org>
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>
--- drivers/usb/misc/lvstest.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/misc/lvstest.c +++ b/drivers/usb/misc/lvstest.c @@ -366,6 +366,10 @@ static int lvs_rh_probe(struct usb_inter 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 */
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