Bug 667370

Summary: enforcing MLS -- security_validate_transition: denied for oldcontext=... newcontext=...
Product: Red Hat Enterprise Linux 6 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: low    
Version: 6.1CC: dwalsh, ksrot
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-3.7.19-64.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-19 11:57:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Milos Malik 2011-01-05 13:08:05 UTC
Description of problem:

Version-Release number of selected component (if applicable):
selinux-policy-mls-3.7.19-62.el6.noarch
selinux-policy-doc-3.7.19-62.el6.noarch
selinux-policy-minimum-3.7.19-62.el6.noarch
selinux-policy-3.7.19-62.el6.noarch
selinux-policy-targeted-3.7.19-62.el6.noarch

How reproducible:
always (seen on 2 different machines, appeared after each reboot)

Steps to Reproduce:
1. install MLS policy on a RHEL-6 machine
2. modify /etc/selinux/config so that the machine will start up with MLS policy in enforcing mode
3. modify /boot/grub/grub.conf so that the machine will start up into single-user mode
4. run 'touch /.autorelabel'
5. run 'reboot'
6. log in as root via console
7. run "dmesg | grep type="

Actual results:
type=2000 audit(1294209652.908:1): initialized
type=1404 audit(1294209663.636:2): enforcing=1 old_enforcing=0 auid=4294967295 ses=4294967295
type=1403 audit(1294209663.973:3): policy loaded auid=4294967295 ses=4294967295
type=1401 audit(1294209664.117:4): security_validate_transition:  denied for oldcontext=system_u:object_r:tmpfs_t:s15:c0.c1023 newcontext=system_u:object_r:device_t:s0 taskcontext=system_u:system_r:kernel_t:s15:c0.c1023 tclass=dir
type=1400 audit(1294227665.323:5): avc:  denied  { connectto } for  pid=733 comm="initctl" path=002F636F6D2F7562756E74752F75707374617274 scontext=system_u:system_r:udev_t:s0-s15:c0.c1023 tcontext=system_u:system_r:init_t:s0-s15:c0.c1023 tclass=unix_stream_socket
  
Expected results:
no denials

Comment 2 Miroslav Grepl 2011-01-05 14:24:42 UTC
It can be allowed by

mls_file_downgrade(kernel_t)

Comment 4 Daniel Walsh 2011-01-05 20:29:07 UTC
Is this after the relabel to MLS?

Comment 5 Milos Malik 2011-01-06 09:04:54 UTC
These denials are not visible immediately after relabel to MLS, because I always add "enforcing=0" to /boot/grub/grub.conf before I run "touch /.autorelabel ; reboot".
In this moment the machine has booted up to single-user mode with MLS policy and /boot/grub/grub.conf still contains "enforcing=0".
As soon as I remove "enforcing=0" from /boot/grub/grub.conf and run reboot, these denials become visible.

Comment 6 Miroslav Grepl 2011-01-06 09:42:44 UTC
The same for me. The error is repeated during each reboot.

Comment 7 Daniel Walsh 2011-01-06 16:54:07 UTC
Ok if they are after the relabel then add the policy.

Comment 8 Miroslav Grepl 2011-01-10 18:33:19 UTC
Fixed in selinux-policy-3.7.19-63.el6

Comment 10 Milos Malik 2011-01-13 13:56:13 UTC
With -63.el6 policy I'm still seeing the second denial:

type=1400 audit(1294926491.024:4): avc:  denied  { connectto } for  pid=553 comm="initctl" path=002F636F6D2F7562756E74752F75707374617274 scontext=system_u:system_r:udev_t:s0-s15:c0.c1023 tcontext=system_u:system_r:init_t:s0-s15:c0.c1023 tclass=unix_stream_socket

Comment 11 Miroslav Grepl 2011-01-14 15:16:17 UTC
Fixed in selinux-policy-3.7.19-64.el6

Comment 14 errata-xmlrpc 2011-05-19 11:57:18 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-2011-0526.html