Re: [PATCH v3] leds: Introduce userspace leds driver

[Pavel Machek]

On Thu 2016-09-15 10:31:50, David Lechner wrote:
> On 09/15/2016 09:54 AM, Jacek Anaszewski wrote:
> >Hi Pavel,
> >
> >On 09/15/2016 03:08 PM, Pavel Machek wrote:
> >>Hi!
> >>
> >>>>+    if (copy_from_user(&udev->user_dev, buffer,
> >>>>+               sizeof(struct uleds_user_dev))) {
> >>>>+        ret = -EFAULT;
> >>>>+        goto out;
> >>>>+    }
> >>>>+
> >>>>+    if (!udev->user_dev.name[0]) {
> >>>>+        ret = -EINVAL;
> >>>>+        goto out;
> >>>>+    }
> >>>>+
> >>>>+    ret = led_classdev_register(NULL, &udev->led_cdev);
> >>>>+    if (ret < 0)
> >>>>+        goto out;
> >>
> >>No sanity checking on the name -> probably a security hole. Do not
> >>push this upstream before this is fixed.
> >
> >Thanks for catching this.
> >
> >David, please check if the LED name sticks to the LED class
> >device naming convention.
> 
> I don't think it is a good idea to enforce the LED class naming convention.
> Someone may have a userspace application they want to test that has a
> hard-coded name that does not follow the convention.

Umm.

Noone has applications with hardcoded names that are not possible
today, right?

And better not encourage crazy names.

Best regards,
									Pavel
-- 
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