Problem with SELinux

Daniel J Walsh dwalsh at redhat.com
Tue Nov 23 14:22:01 UTC 2010


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On 11/23/2010 07:56 AM, Alan Cox wrote:
> On Tue, 23 Nov 2010 12:52:41 +0000
> Paul Smith <phhs80 at gmail.com> wrote:
> 
>> Dear All,
>>
>> I am experiencing the following problem with SELinux on F14:
>>
>> Nov 23 12:49:33 localhost kernel: [ 4881.260409] type=1400
>> audit(1290516573.348:31748): avc:  denied  { execstack } for
>> pid=14597 comm="myprogram"
>> scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
>> tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
>> tclass=process
>>
>> How can I circumvent that?
> 
> The application is trying to execute code on its stack - which usually
> means it is either buggy or being exploited.
> 
> What is "myprogram" ?
Stop running bad programs.  :*

If the app is written using a tool like java/mono or something like
this, it may be required.

You have two choices you can either label it execmem_exec_t.

# semanage fcontext -a -t execmem_exec_t PATHTOMYPROGRAM
# restorecon PATHTOMYPROGRAM

Or you can turn the check off altogether by executing

# setsebool -P allow_execstack 1


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