Re: sound within sandboxed firefox

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On Mon, 2013-12-09 at 19:28 +0000, fedorauser wrote:
> It doesn't seem to work in permissive mode either.
> 
> There is no ~/.pulse in my home.
> 

I've been playing with this a bit and this quick and dirty hack "fixed" it for me:

cat > mysand.te <<EOF
policy_module(mysand, 1.0.0)

gen_require(`
	type sandbox_web_client_t;
')

allow sandbox_web_client_t self:process setcap;

application_signull(sandbox_web_client_t)

domain_role_change_exemption(sandbox_web_client_t)
domain_system_change_exemption(sandbox_web_client_t)

allow sandbox_web_client_t self:process transition;
role system_r types sandbox_web_client_t;
EOF

make -f /usr/share/selinux/devel/Makefile mysand.pp

sudo semodule -i mysand.pp

Couple comments: not sure if the "domain_role_change_exemption(sandbox_web_client_t)" is actually needed, but i guess it would make sense if it does

I don't know why pulseaudio is determined to run with the system_r role but i suspect it may be started by the dbus system bus? (in other distros, and refpolicy pulseaudio just runs with the user role)

This is just a dirty hack

You might want to create a different sandbox with this functionality instead of extending the existing sandbox_web_client_t one like it did in my example

To see how you can create custom sandbox policies: 

https://www.youtube.com/watch?v=0PaNlkjXrWk

Make sure to restart your sandbox after you loaded this policy



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