Bug 971603
| Summary: | selinux preventing loading of iscsi transport kernel modules | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Chris Leech <cleech> | ||||
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | urgent | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 19 | CC: | dominick.grift, dwalsh, mgrepl | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | selinux-policy-3.12.1-52.fc19 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2013-06-15 03:06:54 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: | |||||||
| Attachments: |
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commit 149b344ee76b7b3a3d27e9e72649b182578eea8f
Author: Miroslav Grepl <mgrepl>
Date: Fri Jun 7 09:25:16 2013 +0200
Allow iscsid auto-load kernel modules needed for proper iSCSI functionalit
I did my own test build of the newly merged changes in fedora scm. The filesystem access issues are resolved, but kernel module loading still fails (without any audit.log entry) when running in enforcing mode. I'm pretty sure it's a capability check on CAP_SYS_MODULE that's failing. ltrace show the failed libkmod call as kmod_module_probe_insert_module(...) = 0xffffffff and strace show the failed syscall to be finit_module(...) = -1 EPERM Currently we have in policy dontaudit iscsid_t iscsid_t : capability sys_module ; Which looks like it is covering this up. Chris,
does it work with
# cat mypol.te
policy_module(mypol,1.0)
require{
type iscsid_t;
}
dontaudit iscsid_t iscsid_t : capability sys_module ;
and
# make -f /usr/share/selinux/devel/Makefile
# semodule -i mypol.pp
(In reply to Miroslav Grepl from comment #4) > Chris, > does it work with > > # cat mypol.te > policy_module(mypol,1.0) > require{ > type iscsid_t; > } > dontaudit iscsid_t iscsid_t : capability sys_module ; > > > and > > # make -f /usr/share/selinux/devel/Makefile > # semodule -i mypol.pp No. The dontaudit filtering is what was confusing me, not what I'm after. I'd like to allow iscsid to load kernel modules. Something like this (working for me) allow iscsid_t self:capability { sys_module }; If there's a reason we can't allow that, I'll have to go back to forcing all the iscsi related modules to be loaded. Chris, I wanted to write allow iscsid_t iscsid_t : capability sys_module ; (In reply to Miroslav Grepl from comment #6) > Chris, > I wanted to write > > allow iscsid_t iscsid_t : capability sys_module ; Yes, that works commit 9692eb1a90de66bf7e2b3846b5f2bf5a86835233
Author: Miroslav Grepl <mgrepl>
Date: Thu Jun 13 11:05:10 2013 +0200
iscsid needs sys_module to auto-load kernel modules
selinux-policy-3.12.1-52.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/selinux-policy-3.12.1-52.fc19 selinux-policy-3.12.1-52.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report. |
Created attachment 757934 [details] audit.log entries related to iscsi Description of problem: With selinux in enforcing mode, iscsid cannot auto-load kernel modules needed for proper iSCSI functionality. Version-Release number of selected component (if applicable): 3.12.1-48.fc19 How reproducible: Always Steps to Reproduce: 1. Have an iSCSI target record configured in /var/lib/iscsi 2. Start the iscsid.service 3. Start the iscsi.service or manually run iscsiadm -m node --login Actual results: Failure to login with error "iSCSI driver not found" Expected results: iSCSI transport kernel module loads and iSCSI session login is successful Additional info: In this case I'm trying to load iscsi_tcp (and it's dependant modules), but there are other transport modules for offloaded iSCSI (qla4xxx, cxgb3i, cxgb4i, bnx2i, be2iscsi, ib_iser) Previously the iscsid startup script loaded all of the transport modules. Instead I've enabled libkmod support in iscsid to load only the needed kernel modules on demand.