Description of problem: Get "Unknown" values fetching the values from munin-node. Version-Release number of selected component (if applicable): munin-node-1.4.4-1.fc12.noarch How reproducible: Steps to Reproduce: 1. Install munin-node. Autoconfiguration finds and can read the file /selinux/avc/cache_stats and therefore activates the plugin on the node. 2. See, that you get only "Unknown" values ----- 8< ----- # telnet localhost 4949 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. # munin node at localhost fetch selinux_avcstat lookups.value U hits.value U misses.value U allocations.value U reclaims.value U frees.value U . ----- >8 ----- Actual results: No values in graph. Expected results: I got reasonable values from a plugin, when I run it via "munin-run" on the node: ----- 8< ----- # munin-run selinux_avcstat lookups.value 25863367 hits.value 25837715 misses.value 25652 allocations.value 25657 reclaims.value 24624 frees.value 25156 ----- >8 ----- and also, when executing the script directly even under user munin: ----- 8< ----- sudo -u munin /etc/munin/plugins/selinux_avcstat lookups.value 29744406 hits.value 29717050 misses.value 27356 allocations.value 27361 reclaims.value 26320 frees.value 26852 ----- >8 ----- After setting SELinux mode to *permissive* it worked also for the munin-node: # telnet localhost 4949 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. # munin node at localhost fetch selinux_avcstat lookups.value 33223592 hits.value 33194702 misses.value 28890 allocations.value 28900 reclaims.value 27856 frees.value 28392 .
Can you look at your /var/log/audit/audit.log and attach the exact denials you are getting here?
There are none.. I fetched the values via telnet, but that gives no entry in audit.log. But when I switch to permissive node, the plugin works.. Format of the content of the file is similiar in both modes: enforcing mode # cat /selinux/avc/cache_stats lookups hits misses allocations reclaims frees 53079187 53046439 32748 32763 32224 32264 0 0 0 0 0 0 after switch to permissive # cat /selinux/avc/cache_stats lookups hits misses allocations reclaims frees 53113195 53080428 32767 32782 32240 32280 0 0 0 0 0 0 I have no idea, what's happening there and hope you have one.. Gabriele
Possibly this is a 'noaudit' rule. Try: semodule -DB This will disable ALL the no audit rules, so you will see a flood of things. Then try and isolate which log messages are from munin-node trying to access this. (then semodule -B to put them back to normal.) Can you try that and see if you can get some audit messages from the failing case?
ok, here they are: type=AVC msg=audit(1271612210.775:312): avc: denied { getattr } for pid=4587 comm="selinux_avcstat" path="/selinux/avc/cache_stats" dev=selinuxfs ino=24 scontext=system_u:system_r:munin_t:s0 tcontext=system_u:object_r:security_t:s0 tclass=file type=SYSCALL msg=audit(1271612210.775:312): arch=40000003 syscall=195 success=no exit=-13 a0=8576ee8 a1=bff18a8c a2=5a3ff4 a3=8576ee8 items=0 ppid=4586 pid=4587 auid=4294967295 uid=0 gid=478 euid=0 suid=0 fsuid=0 egid=478 sgid=478 fsgid=478 tty=(none) ses=4294967295 comm="selinux_avcstat" exe="/bin/bash" subj=system_u:system_r:munin_t:s0 key=(null) -Gabriele
Note: In addition to getattr, you also need to allow read and open. A .te file like this will serve as a test case, allowing the operation: --- cut here --- module muninlocal 0.0.1; require { type munin_t; type security_t; class file { getattr read open }; } allow munin_t security_t:file { getattr read open }; --- cut here --- Save as muninlocal.te Compile and install with: checkmodule -M -m -o muninlocal.mod muninlocal.te semodule_package -o muninlocal.pp muninlocal.mod semodule -i muninlocal.pp After this, "telnet localhost 4949", "fetch selinux_avcstat" and the values will be reported.
Err, the second line of compile/install should read: semodule_package -o muninlocal.pp -m muninlocal.mod
This message is a reminder that Fedora 12 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 12. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '12'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 12's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 12 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
The recipe of arth works. Please add such a rule in Munins Policy.
This issue also exists in Fedora 14. and the policy changes from arth fix this issue.
With a clean install + updates of F14 or F15, can you replicate this problem, and provide avc's? If so, please change the version to "14" or "15" as appropriate. F13 is going EOL in about 3 weeks. Also include 'rpm -qa munin* selinux-policy*' output so they can be referenced. Just for reference, the commands to build and install the policy from arth above could be shortened a bit too: make -f /usr/share/selinux/devel/Makefile muninlocal.pp semodule -i muninlocal.pp
This message is a reminder that Fedora 13 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 13. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '13'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 13's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 13 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Fedora 13 changed to end-of-life (EOL) status on 2011-06-25. Fedora 13 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.