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USB: lvtest: return proper error code in probe

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commit 531412492ce93ea29b9ca3b4eb5e3ed771f851dd upstream.

lvs_rh_probe() can return some nonnegative value from usb_control_msg()
when it is less than "USB_DT_HUB_NONVAR_SIZE + 2" that is considered as
a failure. Make lvs_rh_probe() return -EINVAL in this case.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200805090643.3432-1-novikov@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Evgeny Novikov 2020-08-05 12:06:43 +03:00 committed by Greg Kroah-Hartman
parent 2c455e9c58
commit 0aa219d64f
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/lvstest.c
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@ -432,7 +432,7 @@ static int lvs_rh_probe(struct usb_interface *intf,
USB_DT_SS_HUB_SIZE, USB_CTRL_GET_TIMEOUT);
if (ret < (USB_DT_HUB_NONVAR_SIZE + 2)) {
dev_err(&hdev->dev, "wrong root hub descriptor read %d\n", ret);
return ret;
return ret < 0 ? ret : -EINVAL;
}
/* submit urb to poll interrupt endpoint */