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From:   Dominick Grift <dominick.grift@defensec.nl>
To:     Russell Coker <russell@coker.com.au>
Cc:     selinux-refpolicy@vger.kernel.org
Subject: Re: /dev/vhost-vsock
References: <1863651.PGxljZVUGs@liv>
Date:   Sat, 11 Apr 2020 08:17:59 +0200
In-Reply-To: <1863651.PGxljZVUGs@liv> (Russell Coker's message of "Sat, 11 Apr
        2020 13:55:05 +1000")
Message-ID: <ypjly2r2lf54.fsf@defensec.nl>
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Russell Coker <russell@coker.com.au> writes:

> Would vhost_device_t be the right type for /dev/vhost-vsock?
>
> https://wiki.qemu.org/Features/VirtioVsock
>
> This seems to be the documentation for it.

this is the "ptrace" equivalent for applications that use user
namespaces like, i think, firefox and flatpak. This event will surface
if you do a `ps auxZ` when you have a running instance of a application
the uses user name spaces.

In the case of firefox you would for example append it below this line:
https://github.com/SELinuxProject/refpolicy/blob/master/policy/modules/apps/mozilla.if#L40
like so:
allow $2 mozilla_t:cap_userns sys_ptrace;

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Dominick Grift