Bug 1268865
| Summary: | SELinux is preventing sge_execd from using the sys_ptrace capability | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Mike Grant <mggr> |
| Component: | selinux-policy-targeted | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED EOL | QA Contact: | Ben Levenson <benl> |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 21 | CC: | dwalsh |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-12-02 15:35:24 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Here's a policy dump from audit2allow capturing a few more denials:
[root@pmpc1294 ~]# ausearch -m avc -c sge_execd | audit2allow -m sge_execd_policy -o sge_execd_policy.te
[root@pmpc1294 ~]# cat sge_execd_policy.te
=================================
module sge_execd_policy 1.0;
require {
type sge_shepherd_t;
type sge_execd_t;
type sge_job_t;
type sge_tmp_t;
class process setsched;
class capability { sys_nice sys_ptrace };
class lnk_file { getattr unlink };
}
#============= sge_execd_t ==============
allow sge_execd_t self:capability { sys_nice sys_ptrace };
allow sge_execd_t sge_job_t:process setsched;
allow sge_execd_t sge_shepherd_t:process setsched;
allow sge_execd_t sge_tmp_t:lnk_file { getattr unlink };
=================================
(loaded and apparently working well)
This message is a reminder that Fedora 21 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 21. It is Fedora's policy to close all bug reports from releases that are no longer maintained.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 EOL if it remains open with a Fedora 'version' of '21'. 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. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 21 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, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. 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. Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 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. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
Description of problem: Grid engine jobs seem to annoy SELinux when running. The ptrace capability is blocked, which doesn't appear to stop the jobs completely successfully, but does spend a lot of CPU filling logs with warnings. Version-Release number of selected component (if applicable): - Tested with the latest gridengine and selinux policy packages on F21. I haven't got access to a grid engine running on a newer Fedora yet (probably moving straight to F23 after its release). How reproducible: 100% Steps to Reproduce: 1. install gridengine (execd component only, if you have a working cluster) 2. submit some jobs (can provide a detailed reproduction if needed, but I suspect the info below is enough) Actual results: Jobs appear to complete normally. SELinux logs have a lot of activity relating to ptrace (maybe 5 messages a second in the example I looked at). setroubleshootd spends a lot of CPU parsing them nicely. Expected results: I think ptrace is probably a reasonable capability for the sge_execd execution daemon to want to use, in order to monitor its child processes, but I'm no expert on it. Either way, it would be nice not to have the SELinux logs hammered! Additional info: ---------------------- SELinux is preventing sge_execd from using the sys_ptrace capability. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that sge_execd should have the sys_ptrace capability 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 sge_execd /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:sge_execd_t:s0 Target Context system_u:system_r:sge_execd_t:s0 Target Objects Unknown [ capability ] Source sge_execd Source Path sge_execd Port <Unknown> Host pmpc1326.npm.ac.uk Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.13.1-105.20.fc21.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name pmpc1326.npm.ac.uk Platform Linux pmpc1326.npm.ac.uk 4.1.6-100.fc21.x86_64 #1 SMP Mon Aug 17 22:20:37 UTC 2015 x86_64 x86_64 Alert Count 428218 First Seen 2015-09-28 20:06:27 BST Last Seen 2015-10-05 14:17:56 BST Local ID 18f96ae3-cb8e-405f-ab18-117cf1de8253 Raw Audit Messages type=AVC msg=audit(1444051076.898:1853204): avc: denied { sys_ptrace } for pid=1288 comm="sge_execd" capability=19 scontext=system_u:system_r:sge_execd_t:s0 tcontext=system_u:system_r:sge_execd_t:s0 tclass=capability permissive=0 Hash: sge_execd,sge_execd_t,sge_execd_t,capability,sys_ptrace