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Bug 120614 - Set "selinux=0" at boot time will cause kernel panic
Set "selinux=0" at boot time will cause kernel panic
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: policy (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Daniel Walsh
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2004-04-12 01:59 EDT by Wang Anli
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-05-28 09:09:36 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Wang Anli 2004-04-12 01:59:47 EDT
Description of problem:

From RHEL4_Alpha2 Release Notes, selinux can be disabled at boot time 
through adding "selinux=0" option to kernel. But when I tried on 
LangleyPR, it caused "kernel panic". 

LangleyPR hardware info:  x86/Xeon(dual 2.4G)/SCSI(aic7xxx)

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

How reproducible:
-- Install RHEL4_Alpha2_IA32 releases on LangleyPR
-- Boot the installed system with setting "selinux=0" option to kernel
-- ...
   EXT3-fs:recovery complete
   EXT3-fs: mounted filesystem with ordered data mode
   Freeing unused kernel memory: 1.80k freed
   Enforcing mode requested but no policy loaded, Halting now.
   Kernel panic: Attempted to kill init!

-- System hangs up.
Actual results:
Setting "selinux=0" option to boot kernel will cause kernel panic.

Expected results:
Coordinating with Release Notes, selinux=0 option can work and 
disable selinux.

Additional info:
Comment 1 Daniel Walsh 2004-04-12 08:05:13 EDT
You need to update the SysVinit package.  There is a bug in the
package that looks for the /etc/sysconfig/selinux file and if it
exists but the kernel does not support selinux (selinux=0) the init
script exist causing the kernel to crash.  It should just return that
SELinux is not running.  So fixed in rawhide. SysVinit-2.85-23 

Comment 2 Wang Anli 2004-04-12 08:16:04 EDT
Will the fix be integrated in the next RHEL4 release? 

Comment 3 Daniel Walsh 2004-04-12 08:25:23 EDT
Yes,  You can remove the /etc/sysconfig/selinux file and the problem
should go away also.


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