[Webkit-unassigned] [Bug 214811] [GTK] Web process crash during user media permission request calling gst_v4l2_open()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214811

--- Comment #3 from Michael Catanzaro <mcatanzaro at gnome.org> ---
Well it's definitely a bug. Even if there's no permission to access /dev/video1, WebKit shouldn't crash. That's happening because of this critical: assertion 'GST_IS_ELEMENT (element)' failed. So that's the first issue to fix.

Now, as to why the permission error is occurring... I think you were correct to guess a sandbox problem. I would actually never have thought of that, but that must be it. There's actually sandbox rule to bind /dev/video1 in bindV4l in BubblewrapLauncher.cpp. But it can only be bound if it already exists at the time the web process is launched! Testing now, /dev/video0 and /dev/video1 are only created when I actually plug in my webcam, which I usually do long after the web process is already running. The sandbox will never be able to allow access to files that don't already exist at the time the web process is launched, so using /dev/video0 and /dev/video1 from the web process cannot be made to work. I'm pretty sure pipewire is designed to avoid this problem, right? (We're going to need to hook up to pipewire to make desktop sharing work anyway. Maybe we should have a separate bug for pipewire integration?)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20200805/4ddb62ea/attachment.htm>