Description of problem: Printing with the hplip drivers, which are installed by hp-setup, is not working because of wrong selinux policy. AVC denial message: avc: denied { execute } for pid=4367 comm="hpijs" path="/usr/share/hplip/prnt/plugins/lj-x86_64.so" dev=sda1 ino=998995 scontext=system_u:system_r:hplip_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:usr_t:s0 tclass=file Version-Release number of selected component (if applicable): 3.6.12-53.fc11 How reproducible: always. Steps to Reproduce: 1. install hp linux printing driver (I have a LaserJet P1005) by issuing hp-setup. 2. configure/restart cups (the configuration is done automatically by hp-setup). 3. print a test page. Actual results: Test page sits in the cups print queue indefinitely with status waiting. Expected results: Page should be printed (status=processing and actual printing being done.) Additional info: drgift on #fedora-selinux proposed the following solution, which worked: semanage fcontext -a -t lib_t /usr/share/hplip/prnt/plugins/lj-x86_64.so This fixed the error, the printing is okay.
update: more avc messages generated after the printer had been turned off and then back on: ---- time->Fri Jul 3 16:41:43 2009 type=SYSCALL msg=audit(1246628503.809:141): arch=c000003e syscall=59 success=yes exit=0 a0=7fff5d5f49b0 a1=7fff5d5f41a0 a2=7fff5d5f5710 a3=7fff5d5f3de0 items=0 ppid=12823 pid=12834 auid=500 uid=0 gid=7 euid=0 suid=0 fsuid=0 egid=7 sgid=7 fsgid=7 tty=(none) ses=1 comm="cups-pdf" exe="/usr/lib/cups/backend/cups-pdf" subj=unconfined_u:system_r:cups_pdf_t:s0-s0:c0.c1023 key=(null) type=AVC msg=audit(1246628503.809:141): avc: denied { read write } for pid=12834 comm="cups-pdf" path="anon_inode:[eventpoll]" dev=anon_inodefs ino=91 scontext=unconfined_u:system_r:cups_pdf_t:s0-s0:c0.c1023 tcontext=system_u:object_r:anon_inodefs_t:s0 tclass=file ---- time->Fri Jul 3 16:41:43 2009 type=SYSCALL msg=audit(1246628503.859:142): arch=c000003e syscall=2 success=no exit=-13 a0=7ffffdd28750 a1=0 a2=7ffffdd2875c a3=fffffff8 items=0 ppid=12823 pid=12846 auid=500 uid=0 gid=7 euid=0 suid=0 fsuid=0 egid=7 sgid=7 fsgid=7 tty=(none) ses=1 comm="python" exe="/usr/bin/python" subj=unconfined_u:system_r:hplip_t:s0-s0:c0.c1023 key=(null) type=AVC msg=audit(1246628503.859:142): avc: denied { read } for pid=12846 comm="python" name="mls" dev=selinuxfs ino=12 scontext=unconfined_u:system_r:hplip_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file fix was the following command (thanks to drgift @ #fedora-selinux for that): ausearch -m avc -ts recent | grep cups_pdf_t | audit2allow -RM mycups; semodule -i mycups.pp
/usr/share/hplip/prnt/plugins/lj-x86_64.so Label is lib_t, you just needed to run restorecon on it.
Miroslav, looks like cups.te needs fs_rw_anon_inodefs_files(cupsd_pdf_t)
It is lib_t, but strangely why, when no such file exists (at the first run of hplip installer, and each and every time I delete and then add again the printer), the file is created as usr_t, but not lib_t. Is this normal behavior? Moreover, cupsd_pdf_t, as mentioned above, was essential to the working of the printer.
All files adopt the context of the parent directory if the installer is not SELinux aware (rpm). matchpathcon /usr/share/hplip/prnt/plugins /usr/share/hplip/prnt/plugins system_u:object_r:usr_t:s0 So if the installer just places a file in this directory it will be labeled usr_t, if the only files in this directory are shared libraries, we should probaly fix the labeling of the directory to be lib_t.
+1 for changing the directory's type to lib_t. More, the installer places a link to lj-x86_64.so, called lj.so in the same folder, which is of usr_t, and I had to change its type to lib_t also. I don't know currently of any other files being placed in that folder.
Fixed in selinux-policy-3.6.12-64.fc11
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