Re: SELinux fails to apply local policy module

[Daniel J Walsh]

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On 04/18/2013 05:07 PM, Suvayu Ali wrote:
>  Hi Daniel,
>  
>  On Mon, Apr 15, 2013 at 05:32:23PM -0700, Daniel J Walsh wrote:
> > You seem to have a lot of cruft in your policy directory.
> > 
> > Could you just remove the directory and reinstall policy.
> > 
> > 
> > # setenforce 0 # rm -rf /etc/selinux/targeted # yum reinstall
> > selinux-policy-targeted # restorecon -R -v /etc/selinux/targeted #
> > semanage fcontext -a -e / /home/slc5
> > 
> > Should be all you need
>  
>  I did the above.  Not sure if things behave any better.  My application 
>  fails with the following alert:
>  
>  SELinux is preventing /home/jallad/.local/share/Steam/ubuntu12_32/steam
>  from using the execheap access on a process.
>  
>  Raw Audit Messages: type=AVC msg=audit(1366316027.599:12718): avc: denied {
>  execheap } for pid=15540 comm="hl2_linux" 
>  scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 
>  tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 
>  tclass=process
>  
>  type=SYSCALL msg=audit(1366316027.599:12718): arch=i386 syscall=capget 
>  success=yes exit=0 a0=8bc4000 a1=c000 a2=7 a3=ffb445dc items=0 ppid=15537
>  pid=15540 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500
>  sgid=500 fsgid=500 ses=2 tty=pts13 comm=hl2_linux 
>
> exe=2F686F6D652F6A616C6C61642F2E6C6F63616C2F73686172652F537465616D2F537465616D417070732F646A616C6C61642F5465616D20466F72747265737320322F686C325F6C696E7578
>
>   
subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
>  
>  Hash: steam,unconfined_t,unconfined_t,process,execheap
>  
>  So I try to make a custom policy module as suggested by the troubleshooter.
>  But then it nothing is found in the log file.
>  
>  # grep steam /var/log/audit/audit.log | audit2allow -M mypol Nothing to do
>  
>  Not sure how to proceed now.
>  
>  Thanks for any ideas.
>   
You could turn on the selinuxuser_execheap boolean.  (allow_execheap if you
have an older SELinux).

# setsebool -P selinuxuser_execheap 1

Then you should be all set.

Execheap is not an access that should be required by applications, it is
considered dangerous and you should report a bug to steam.

http://www.akkadia.org/drepper/selinux-mem.html

Explains the access.

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