writable memory segment: mplayer

[Paul Howarth]

Stephen Smalley wrote:
> On Thu, 2008-10-09 at 13:29 +0530, Rahul Sundaram wrote:
>> Hi
>>
>>
>> Since Fedora doesn't include this software, should a exception be added 
>> to the SELinux policy?
>>
>> "If you trust mplayer to run correctly, you can change the context of 
>> the executable to unconfined_execmem_exec_t. "chcon -t 
>> unconfined_execmem_exec_t '/usr/bin/mplayer'". You must also change the 
>> default file context files on the system in order to preserve them even 
>> on a full relabel. "semanage fcontext -a -t unconfined_execmem_exec_t 
>> '/usr/bin/mplayer'"
> 
> I'd recommend always telling the user to run the semanage command first,
> and then run restorecon /usr/bin/mplayer afterward to set it on disk,
> rather than having to separately specify the type via chcon.
> setroubleshoot really shouldn't ever tell the user to use chcon IMHO.

Fedora doesn't include the software, but SELinux policy already includes 
contexts for it, e.g. on F-9:

# semanage fcontext -l | grep mplayer
/usr/bin/xine                                      regular file 
system_u:object_r:mplayer_exec_t:s0
/usr/bin/mplayer                                   regular file 
system_u:object_r:mplayer_exec_t:s0
/usr/lib/vmware/bin/vmplayer                       regular file 
system_u:object_r:vmware_exec_t:s0
/usr/lib64/vmware/bin/vmplayer                     regular file 
system_u:object_r:vmware_exec_t:s0

So if the current policy isn't right, can't we just fix it and be done 
with it rather than adding extra corner cases to setroubleshoot?

Or is it that the default policy works except when using particular 
binary codecs that do weird stuff?

Paul.