Bug 626680

Summary: Installing the netdisco package causes incorrect SELinux labeling on /usr/share & /usr/share/*
Product: [Fedora] Fedora Reporter: Jeff Raber <jeff.raber>
Component: netdiscoAssignee: Walter Gould <walt>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: low    
Version: 13CC: walt
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Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2011-06-28 14:06:58 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Jeff Raber 2010-08-24 05:36:11 UTC
Description of problem:
The netdisco package creates the user 'netdisco' with uid > 500, login shell = /bin/bash and homedir=/usr/share/netdisco.  Unfortunately, that combination of attributes causes SELinux to detect /usr/share/netdisco as a USER_HOME_DIR and /usr/share as a 'HOME_ROOT'.  The result is that /usr/share gets labeled as system_u:object_r:home_root_t:s0 and all subdirs (/usr/share/*) are labeled as unconfined_u:object_r:user_home_dir_t:s0.  This causes many thousands of AVC denials and a generally unusable system if running with SELinux enabled.

Version-Release number of selected component (if applicable):

How reproducible:
I haven't tried, but it should be 100% reproducible.

Steps to Reproduce:
1. Install F13 with SELinux enabled.
2. Install netdisco.
3. 'touch ./autorelabel && reboot' (OR wait until some other process kicks off a relabel (ex. an update to selinux-policy* package)
Actual results:
Some services fail to start on boot.  System is VERY slow.  Thousands of AVC's logged.  'audispd: queue is full - dropping event' messages in /var/log/message.  /usr/share is now labeled as system_u:object_r:home_root_t:s0 and the subdirs are labeled as unconfined_u:object_r:user_home_dir_t:s0.  Panic ensues.

Expected results:
/usr/share labeling should not be affected by the installation of netdisco.  Ponies.

Additional info:
To solve this problem on my machine, I simply changed the logon shell in /etc/passwd for netdisco to /sbin/nologin.  Another option would have been to change the UID of that user to a value less than 500.  I then ran 'semodule -B' then 'restorecon -v -R /usr/share' which resulted in the correct labeling being applied to /usr/share and its subdirs.  (Later I performed a complete relabel just to be sure that SELinux was happy)

Comment 1 Jeff Raber 2010-08-24 05:38:34 UTC
This bug is similar to 586271.

Comment 2 Bug Zapper 2011-06-01 10:39:24 UTC
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'.

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Comment 3 Bug Zapper 2011-06-28 14:06:58 UTC
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.