Bug 1409115

I've started creating a selinux package for boomage, unfortunately without success: https://martinkg.fedorapeople.org/Review/test/boomaga/

@MartinKG
 
Maybe following information will help for you. Package cups-pdf has similar requirements and has correct SELinux policy. The difference is that cups-pdf writes files to the user desktop instead of ~/.cache.

boomaga-0.8.0-6.git97f52c1.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-da50adf63e

boomaga-0.8.0-6.git97f52c1.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2017-5d0871e3fd

boomaga-0.8.0-6.git97f52c1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-5d0871e3fd

boomaga-0.8.0-6.git97f52c1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-da50adf63e

boomaga-0.8.0-6.git97f52c1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

boomaga-0.8.0-8.gitb495615.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-5bd6a83c49

boomaga-0.8.0-8.gitb495615.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-5bd6a83c49

boomaga-0.8.0-8.gitb495615.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

I can print to boomaga printer, but with a delay about 30 seconds per task. SELinux Troubleshooter reports an error.

SELinux is preventing boomagabackend from 'sys_ptrace' accesses on the cap_userns Unknown.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that boomagabackend should be allowed sys_ptrace access on the Unknown cap_userns by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'boomagabackend' --raw | audit2allow -M my-boomagabackend
# semodule -X 300 -i my-boomagabackend.pp

Additional Information:
Source Context                system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023
Target Context                system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023
Target Objects                Unknown [ cap_userns ]
Source                        boomagabackend
Source Path                   boomagabackend
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-225.11.fc25.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.9.14-200.fc25.x86_64 #1 SMP Mon
                              Mar 13 19:26:40 UTC 2017 x86_64 x86_64
Alert Count                   3
First Seen                    2017-03-25 00:29:09 MSK
Last Seen                     2017-03-25 00:32:12 MSK
Local ID                      531f80ea-deab-40c6-9bd0-c7375eef6639

Raw Audit Messages
type=AVC msg=audit(1490391132.808:798): avc:  denied  { sys_ptrace } for  pid=12332 comm="boomagabackend" capability=19  scontext=system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023 tcontext=system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1


Hash: boomagabackend,boomaga_cups_t,boomaga_cups_t,cap_userns,sys_ptrace

i post a comment from Lukas Vrabec on the Fedora selinux forum:
https://lists.fedoraproject.org/archives/list/selinux@lists.fedoraproject.org/thread/VUOKKV77ETH45QIFED2XZWHEIAUJARND/

boomaga SELinux module is not part of selinux-policy package, which
means it's not maintained by Fedora SELinux team. I cloned boomaga repo
and boomaga policy is part of permissivedomains, which means that
boomaga rules won't be enforced by kernel, even if your system is in
enforcing state. If you would like to fix this issue you can create
local module:

$ cat boomaga_local.cil
(allow boomaga_cups_t boomaga_cups_t(cap_userns (sys_ptrace)))

# semodule -i boomaga_local.cil
#

new comment form Lukas Vrabec on the Fedora selinux forum:

Update your boomaga_local.cil file:
$ cat boomaga_local.cil
(allow boomaga_cups_t boomaga_cups_t(cap_userns (sys_ptrace)))
(allow systemd_logind_t boomaga_cups_t(dbus (send_msg)))

and load it again:
# semodule -i boomaga_local.cil

Thank you for supporting this issue. I got another bunch of errors, but
I tried to solve it myself.

$ journalctl -b
Apr 04 19:17:47 magnolia.home.lan audit[938]: USER_AVC pid=938 uid=81
auid=4294967295 ses=4294967295
subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied
{send_msg } for msgtype=method_call
interface=org.freedesktop.DBus.Introspectable member=Introspect
dest=org.freedesktop.login1 spid=5692 tpid=952
scontext=system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023
tcontext=system_u:system_r:systemd_logind_t:s0 tclass=dbus
exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'

$ cat boomaga_local.cil
(allow boomaga_cups_t boomaga_cups_t(cap_userns (sys_ptrace)))
(allow systemd_logind_t boomaga_cups_t(dbus (send_msg)))
(allow boomaga_cups_t systemd_logind_t(dbus (send_msg)))

$ sudo semodule -i boomaga_local.cil

$ journalctl -b
Apr 04 19:30:48 magnolia.home.lan dbus-daemon[1597]: avc: denied {
send_msg } for msgtype=method_call interface=org.boomaga member=add
dest=org.boomaga spid=6894 tpid=6852
scontext=system_u:system_r:boomaga_cups_t:s0-s0:c0.c1023
tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tclass=dbus

$ cat boomaga_local.cil
(allow boomaga_cups_t boomaga_cups_t(cap_userns (sys_ptrace)))
(allow systemd_logind_t boomaga_cups_t(dbus (send_msg)))
(allow boomaga_cups_t systemd_logind_t(dbus (send_msg)))
(allow boomaga_cups_t unconfined_t(dbus (send_msg)))

$ sudo semodule -i boomaga_local.cil

Printing to boomaga is working without errors and delays now.

This bug appears to have been reported against 'rawhide' during the Fedora 27 development cycle.
Changing version to '27'.

This issue is still present on Fedora 36. After installing the `boomaga-selinux` package I still get the following SELinux errors:
```
SELinux is preventing boomaga from setattr access on the directory /var/cache/boomaga/chris.

*****  Plugin catchall_labels (83.8 confidence) suggests   *******************

If you want to allow boomaga to have setattr access on the chris directory
Then you need to change the label on /var/cache/boomaga/chris
Do
# semanage fcontext -a -t FILE_TYPE '/var/cache/boomaga/chris'
where FILE_TYPE is one of the following: cupsd_etc_t, cupsd_log_t, cupsd_rw_etc_t, cupsd_tmp_t, cupsd_var_run_t, fonts_cache_t, print_spool_t.
Then execute:
restorecon -v '/var/cache/boomaga/chris'


*****  Plugin catchall (17.1 confidence) suggests   **************************

If you believe that boomaga should be allowed setattr access on the chris directory by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'boomaga' --raw | audit2allow -M my-boomaga
# semodule -X 300 -i my-boomaga.pp

Additional Information:
Source Context                system_u:system_r:cupsd_t:s0-s0:c0.c1023
Target Context                system_u:object_r:var_t:s0
Target Objects                /var/cache/boomaga/chris [ dir ]
Source                        boomaga
Source Path                   boomaga
Port                          <Unknown>
Host                          fedora
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-36.8-2.fc36.noarch
Local Policy RPM              selinux-policy-targeted-36.8-2.fc36.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     fedora
Platform                      Linux fedora 5.17.7-300.fc36.x86_64 #1 SMP PREEMPT
                              Thu May 12 14:56:44 UTC 2022 x86_64 x86_64
Alert Count                   1
First Seen                    2022-05-18 09:25:42 CEST
Last Seen                     2022-05-18 09:25:42 CEST
Local ID                      fcf9d05e-bd5b-4ef6-8a1f-a9a1f94705ff

Raw Audit Messages
type=AVC msg=audit(1652858742.233:473): avc:  denied  { setattr } for  pid=16952 comm="boomaga" name="chris" dev="nvme0n1p7" ino=2129750 scontext=system_u:system_r:cupsd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_t:s0 tclass=dir permissive=0


Hash: boomaga,cupsd_t,var_t,dir,setattr
```

@entodoays you opened a upstream ticket
https://github.com/Boomaga/boomaga/issues/115

It is true that I opened the upstream ticket, but the developer answered with, "Unfortunately I don't have enough time to support this project. Excuse me!". So it is unlikely that anything gets solved there.