Bug 661368 - MLS policy prevents modprobe from reading a shm object
Summary: MLS policy prevents modprobe from reading a shm object
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: selinux-policy
Version: 5.6
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-12-08 16:45 UTC by Milos Malik
Modified: 2013-04-10 07:16 UTC (History)
1 user (show)

Fixed In Version: selinux-policy-2.4.6-300.el5
Doc Type: Bug Fix
Doc Text:
Prior to this update, the SELinux MLS policy prevented modprobe from reading an SHM (shared memory) object. This update corrects the SELinux policy, and modprobe now works as expected.
Clone Of:
Environment:
Last Closed: 2011-01-13 21:51:53 UTC

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Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0026 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2011-01-12 16:11:15 UTC

Description Milos Malik 2010-12-08 16:45:51 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
selinux-policy-mls-2.4.6-298.el5
selinux-policy-devel-2.4.6-298.el5
selinux-policy-targeted-2.4.6-298.el5
selinux-policy-2.4.6-298.el5
selinux-policy-strict-2.4.6-298.el5
selinux-policy-minimum-2.4.6-298.el5

How reproducible:
always

Steps to Reproduce:
1. install MLS policy on a RHEL-5.6 machine, force filesystem auto-relabel
2. modify /etc/selinux/config so that the machine will start up with MLS policy
in permissive mode
3. reboot into single mode
4. log in via console
5. run dmesg | grep "type="

Actual results:
type=1400 audit(1291801571.871:4): avc:  denied  { unix_read } for  pid=753 comm="modprobe" key=1946157237 scontext=system_u:system_r:insmod_t:s0-s15:c0.c1023 tcontext=system_u:system_r:insmod_t:s15:c0.c1023 tclass=shm
type=1400 audit(1291801571.876:5): avc:  denied  { unix_read } for  pid=753 comm="modprobe" key=1946157237 scontext=system_u:system_r:insmod_t:s0-s15:c0.c1023 tcontext=system_u:system_r:insmod_t:s15:c0.c1023 tclass=shm

Expected results:
no AVCs
Comment 3 Miroslav Grepl 2010-12-09 10:28:38 UTC 
Fixed in selinux-policy-2.4.6-300.el5.
Comment 6 Jaromir Hradilek 2011-01-05 16:30:27 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Prior to this update, the SELinux MLS policy prevented modprobe from reading an SHM (shared memory) object. This update corrects the SELinux policy, and modprobe now works as expected.
Comment 8 errata-xmlrpc 2011-01-13 21:51:53 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0026.html
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