| Summary: | SELinux is preventing /usr/lib/cups/backend/cups-pdf from 'read' accesses on the lnk_file /home/dan/Documents. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Dan Ziemba <zman0900> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | dominick.grift, dwalsh, mgrepl |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:1c9b2e2b7b318b4a931fb7d0ba349046740d0132e30a2a047deb22a182ca701b | ||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-11-04 11:02:45 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
The problems seems to be that selinux is not allowing cups-pdf to follow symlinks when trying to write a pdf to it's output location. I edited /etc/cups/cups-pdf.conf and changed "Out ${DESKTOP}" to "Out ${HOME}/Documents" since GNOME 3 has no desktop icons. The problem is that I have replace my ~/Documents folder (and sever others) with a symlink to a folder on another filesystem that has more space. I've tried setting "Out" to a regular folder in my home and that works fine. I don't know a lot about selinux, but to me it seems reasonable that it should allow something like this to follow a symlink.
Output in /var/log/messages:
Fri Nov 4 05:21:57 2011 [ERROR] failed to create directory (/home/dan/Documents)
Fri Nov 4 05:21:57 2011 [ERROR] failed to create user output directory (/home/dan/Documents)
This is a local customization. Yes, we allow to use a regular folder in /home but not a symlink. # grep cups-pdf /var/log/audit/audit.log | audit2allow -M mycups # semodule -i mycups.pp will fix. |
libreport version: 2.0.6 executable: /usr/bin/python hashmarkername: setroubleshoot kernel: 3.1.0-5.fc16.x86_64 reason: SELinux is preventing /usr/lib/cups/backend/cups-pdf from 'read' accesses on the lnk_file /home/dan/Documents. time: Fri Nov 4 05:39:11 2011 description: :SELinux is preventing /usr/lib/cups/backend/cups-pdf from 'read' accesses on the lnk_file /home/dan/Documents. : :***** Plugin catchall (100. confidence) suggests *************************** : :If you believe that cups-pdf should be allowed read access on the Documents lnk_file 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: :# grep cups-pdf /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context system_u:system_r:cups_pdf_t:s0-s0:c0.c1023 :Target Context unconfined_u:object_r:user_home_t:s0 :Target Objects /home/dan/Documents [ lnk_file ] :Source cups-pdf :Source Path /usr/lib/cups/backend/cups-pdf :Port <Unknown> :Host (removed) :Source RPM Packages cups-pdf-2.5.1-1.fc16 :Target RPM Packages :Policy RPM selinux-policy-3.10.0-53.fc16 :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux zman0900 3.1.0-5.fc16.x86_64 #1 SMP Thu Oct : 27 03:46:50 UTC 2011 x86_64 x86_64 :Alert Count 2 :First Seen Fri 04 Nov 2011 05:19:55 AM EDT :Last Seen Fri 04 Nov 2011 05:21:57 AM EDT :Local ID 125df296-6e2f-44ac-991f-0391a236958d : :Raw Audit Messages :type=AVC msg=audit(1320398517.544:711): avc: denied { read } for pid=4380 comm="cups-pdf" name="Documents" dev=dm-6 ino=130322 scontext=system_u:system_r:cups_pdf_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=lnk_file : : :type=SYSCALL msg=audit(1320398517.544:711): arch=x86_64 syscall=stat success=no exit=EACCES a0=bf95e0 a1=7fff32876440 a2=7fff32876440 a3=0 items=0 ppid=4374 pid=4380 auid=4294967295 uid=0 gid=7 euid=0 suid=0 fsuid=0 egid=7 sgid=7 fsgid=7 tty=(none) ses=4294967295 comm=cups-pdf exe=/usr/lib/cups/backend/cups-pdf subj=system_u:system_r:cups_pdf_t:s0-s0:c0.c1023 key=(null) : :Hash: cups-pdf,cups_pdf_t,user_home_t,lnk_file,read : :audit2allow : :#============= cups_pdf_t ============== :allow cups_pdf_t user_home_t:lnk_file read; : :audit2allow -R : :#============= cups_pdf_t ============== :allow cups_pdf_t user_home_t:lnk_file read; :