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41 results

system_app.te

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    • Nick Kralevich's avatar
      3e78000e
      Allow system_app to set properties · 3e78000e
      Nick Kralevich authored
      Settings > Developer Options > Profile GPU Rendering was broken,
      as it couldn't set a debug.* system property.
      
      In addition, system_app wasn't allowed to access init's property_service socket.
      
      Both fixed.
      
      In addition, allow system_app to write to radio_prop.
      
      Fixes the following denials:
      
      <5>[  170.769658] type=1400 audit(1386722177.029:57): avc:  denied  { write } for  pid=4142 comm="ndroid.settings" name="property_service" dev="tmpfs" ino=7457 scontext=u:r:system_app:s0 tcontext=u:object_r:property_socket:s0 tclass=sock_file
      <4>[  170.770064] avc:  denied  { set } for property=debug.hwui.overdraw scontext=u:r:system_app:s0 tcontext=u:object_r:debug_prop:s0 tclass=property_service
      <3>[  170.770148] init: sys_prop: permission denied uid:1000  name:debug.hwui.overdraw
      
      Bug: 12037026
      Change-Id: I5e879ab339e68e9e4715266fc8a698ab6ad5756e
      3e78000e
      History
      Allow system_app to set properties
      Nick Kralevich authored
      Settings > Developer Options > Profile GPU Rendering was broken,
      as it couldn't set a debug.* system property.
      
      In addition, system_app wasn't allowed to access init's property_service socket.
      
      Both fixed.
      
      In addition, allow system_app to write to radio_prop.
      
      Fixes the following denials:
      
      <5>[  170.769658] type=1400 audit(1386722177.029:57): avc:  denied  { write } for  pid=4142 comm="ndroid.settings" name="property_service" dev="tmpfs" ino=7457 scontext=u:r:system_app:s0 tcontext=u:object_r:property_socket:s0 tclass=sock_file
      <4>[  170.770064] avc:  denied  { set } for property=debug.hwui.overdraw scontext=u:r:system_app:s0 tcontext=u:object_r:debug_prop:s0 tclass=property_service
      <3>[  170.770148] init: sys_prop: permission denied uid:1000  name:debug.hwui.overdraw
      
      Bug: 12037026
      Change-Id: I5e879ab339e68e9e4715266fc8a698ab6ad5756e
    system_app.te 1.21 KiB
    #
    # Apps that run with the system UID, e.g. com.android.system.ui,
    # com.android.settings.  These are not as privileged as the system
    # server.
    #
    type system_app, domain;
    permissive system_app;
    app_domain(system_app)
    
    # Perform binder IPC to any app domain.
    binder_call(system_app, appdomain)
    
    # Read and write system data files.
    # May want to split into separate types.
    allow system_app system_data_file:dir create_dir_perms;
    allow system_app system_data_file:file create_file_perms;
    
    # Read wallpaper file.
    allow system_app wallpaper_file:file r_file_perms;
    
    # Write to dalvikcache.
    allow system_app dalvikcache_data_file:file { write setattr };
    
    # Talk to keystore.
    unix_socket_connect(system_app, keystore, keystore)
    
    # Read SELinux enforcing status.
    selinux_getenforce(system_app)
    
    # Settings app reads sdcard for storage stats
    allow system_app sdcard_type:dir r_dir_perms;
    
    # Allow settings app to read from asec
    allow system_app asec_apk_file:dir search;
    allow system_app asec_apk_file:file r_file_perms;
    
    # Write to properties
    unix_socket_connect(system_app, property, init)
    allow system_app debug_prop:property_service set;
    allow system_app radio_prop:property_service set;
    allow system_app system_prop:property_service set;