[systemd-devel] WebUSB

[Lars Knudsen]

On Jan 10, 2017 18:19, "Greg KH" <greg at kroah.com> wrote:

On Tue, Jan 10, 2017 at 06:04:46PM +0100, Lars Knudsen wrote:
> I figured that made most sense :)
>
> Still, it would be good if we could have a rule to not grab the CDC
interface
> part if the device includes WebUSB functionality.

What exactly do you mean by "grab"?

MM probing :)


> The likelihood of a modem+WebUSB combo is so small that it must fall
> in the category where potential rare exotic devices combining it must
> be whitelisted and the rest be left alone.

I think you misunderstand just how crazy firmware authors can be.  I'm
sure we will see those types of devices in the wild.

...But realistically how many? Bothering 99.9% to support the special case
seems less logical than just finding the 0.1% and whitelisting it (if
needed)


> Also (probably more a generic udev/systemd patch) always give user (or at
least
> browser - if that differentiation is possible) access to WebUSB devices.

That's a bit harder as it requires userspace to parse the headers and
"know" to allow access to the device.  I suggest a udev helper program
for it.

good luck,

greg k-h
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