u:r:system_app:s0              system    6167  182
com.android.systemui:screenshot

Tai


On 3/5/14, 2:15 PM, "Stephen Smalley" <[email protected]> wrote:

>On 03/05/2014 02:11 PM, Tai Nguyen (tainguye) wrote:
>> All,
>> 
>> When I take the screen snapshot by pressing  power button and volume
>>down button. The image is not save correctly because
>> 
>> audit(1394045168.562:4): avc:  denied  { write } for  pid=6267
>>comm=4173796E635461736B202331
>>path="/storage/sdcard0/Pictures/Screenshots/Screenshot_2014-03-05-13-46-0
>>8.png" dev=fuse ino=1080366384 scontext=u:r:system_app:s0
>>tcontext=u:object_r:sdcard_internal:s0 tclass=file
>> 
>> I only see the rule to grant system_app for sdcard_type:dir, but not
>>file, in system_app.te
>> 
>> 
>> # Settings app reads sdcard for storage stats
>> 
>> allow system_app sdcard_type:dir r_dir_perms;
>> 
>> It seems we need to add
>> Allow system_app sdcard_type:file create_file_perms
>> 
>> Not sure why I don¹t see the audit message for create operation. We do
>>have these rules for platform_app though
>> 
>> platform_app.te:allow platformappdomain sdcard_type:dir
>>create_dir_perms;
>> 
>> platform_app.te:allow platformappdomain sdcard_type:file
>>create_file_perms;
>
>Why is that app running in system_app (i.e. why it is running with the
>system UID)?  ps -Z output would be interesting.
>
>


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