Re: Stuck installing guix package manager on Fedora with selinux

[Alexis Simon <alexis.simon@runbox.com>]

Ok I think I'm starting to get somewhere

those are the changes that were needed in the selinux policy to be able 
to start installing a package

==============================================
diff --git a/guix-daemon.cil b/guix-daemon.cil
index 3994e62..c26ed1a 100644
--- a/guix-daemon.cil
+++ b/guix-daemon.cil
@@ -202,7 +202,7 @@
                        sys_admin)))
    (allow guix_daemon_t
           fs_t
-         (filesystem (unmount)))
+         (filesystem (unmount remount)))
    (allow guix_daemon_t
           devpts_t
           (dir (search)))
@@ -308,6 +308,8 @@
           (lnk_file (read)))
    (allow guix_daemon_t NetworkManager_var_run_t
           (dir (search)))
+  (allow guix_daemon_t init_var_run_t
+         (dir (search)))

    ;; Access to profiles
    (allow guix_daemon_t
=============================================

I'll try it out more and update as I go along.

Alexis

On 18/10/2023 10:06, Alexis Simon wrote:
> Hi, Thanks for the suggestion.
> 
> I stumbled on this guix rpm but it seems also that selinux needs to be 
> disabled with that one.
> I think the maintainer initially wanted to apply selinux policies but in 
> the end commented out all those parts. (There's also a hint in the 
> changelog that it doesn't work with selinux, see here [0]).
> 
> As someone else suggested, yes I could set selinux to permissive but I 
> don't find that an acceptable solution. I don't want to disable a 
> security feature of my system.
> 
> Also an update on my initial email: after a reboot, I'm back at square 
> one with the remount error. So the solution wasn't really one.
> 
> Best regards,
> Alexis
> 
> [0] 
> https://copr-dist-git.fedorainfracloud.org/cgit/lantw44/guix/guix.git/tree/guix.spec?h=f38#n556
> 
> On 18/10/2023 06:40, Markku Korkeala wrote:
>> Hi,
>>
>> I haven't tried the official guix installation, but I was
>> able to get guix running on Fedora using rpm packages from copr:
>>
>> https://copr.fedorainfracloud.org/coprs/lantw44/guix/
>>
>> If you can't find solution to the SELinux problem, maybe
>> give those rpm packages a try.
>>
>> Best regards,
>> Markku
>>
>> On Tue, Oct 17, 2023 at 09:42:58AM -0700, Alexis Simon wrote:
>>> Hi,
>>>
>>> I'd like to try the guix package manager but am stuck installing it on
>>> Fedora 38 with selinux. I should say I don't know anything about the 
>>> details
>>> of either guix or selinux.
>>> I know a few other persons that also wanted to try guix but gave up 
>>> due to
>>> issues with selinux, so I think solving this issue could help in 
>>> adoption.
>>>
>>> I've used the installer script which worked well, then was initially 
>>> hit by
>>> this error
>>> `guix install: error: remounting /gnu/store writable: Permission denied`
>>>
>>> This was solved by doing
>>> sudo semodule -i 
>>> /gnu/store/5kj8lyybjrdl7xd0fx9g9vzkz8sklqsy-guix-1.4.0/share/selinux/guix-daemon.cil
>>>
>>> sudo mount -o remount,rw /gnu/store
>>> sudo restorecon -R /gnu /var/guix
>>> sudo systemctl restart guix-daemon.service
>>>
>>> (note that the mount step was the missing part that was missing from all
>>> guides I've seen on the web, and I found it in a guix commit).
>>>
>>> Now I have a different issue, guix-daemon doesn't seem to be able to 
>>> access
>>> internet with errors of the type
>>> `In procedure getaddrinfo: Temporary failure in name resolution`
>>> (disabling selinux works in that case, but I want it enabled)
>>>
>>> This is what I get from setroubleshoot:
>>> ```
>>> SELinux is preventing guix substitute from search access on the 
>>> directory
>>> systemd.
>>> *****  Plugin catchall (100. confidence) suggests   *****
>>> *********************
>>> If you believe that guix substitute should be allowed sea
>>> rch access on the systemd directory by default.
>>> Then you should report this as a bug.
>>> You can generate a local policy module to allow this acce
>>> ss.
>>> Do
>>> allow this access for now by executing:
>>> # ausearch -c 'guix substitute' --raw | audit2allow -M my
>>> -guixsubstitute
>>> # semodule -X 300 -i my-guixsubstitute.pp
>>> ```
>>>
>>> Trying the suggested commands also errors in:
>>> ```
>>> libsepol.hierarchy_add_type_callback: guix_daemon doesn't exist,
>>> guix_daemon.guix_daemon_t is an orphan
>>> libsepol.hierarchy_add_bounds: 1 errors found while adding hierarchies
>>> ```
>>>
>>> So I don't really know where to go from there, any help appreciated.
>>> Thanks
>>> Alexis
>>>
>