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      1 # mediaserver - multimedia daemon
      2 type mediaserver, domain;
      3 type mediaserver_exec, exec_type, file_type;
      4 
      5 typeattribute mediaserver mlstrustedsubject;
      6 
      7 # TODO(b/36375899): replace with hal_client_domain macro on hal_omx
      8 typeattribute mediaserver halclientdomain;
      9 
     10 net_domain(mediaserver)
     11 
     12 r_dir_file(mediaserver, sdcard_type)
     13 r_dir_file(mediaserver, cgroup)
     14 
     15 # stat /proc/self
     16 allow mediaserver proc:lnk_file getattr;
     17 
     18 # open /vendor/lib/mediadrm
     19 allow mediaserver system_file:dir r_dir_perms;
     20 
     21 userdebug_or_eng(`
     22   # ptrace to processes in the same domain for memory leak detection
     23   allow mediaserver self:process ptrace;
     24 ')
     25 
     26 binder_use(mediaserver)
     27 binder_call(mediaserver, binderservicedomain)
     28 binder_call(mediaserver, appdomain)
     29 binder_service(mediaserver)
     30 
     31 allow mediaserver media_data_file:dir create_dir_perms;
     32 allow mediaserver media_data_file:file create_file_perms;
     33 allow mediaserver app_data_file:dir search;
     34 allow mediaserver app_data_file:file rw_file_perms;
     35 allow mediaserver sdcard_type:file write;
     36 allow mediaserver gpu_device:chr_file rw_file_perms;
     37 allow mediaserver video_device:dir r_dir_perms;
     38 allow mediaserver video_device:chr_file rw_file_perms;
     39 
     40 set_prop(mediaserver, audio_prop)
     41 
     42 # Read resources from open apk files passed over Binder.
     43 allow mediaserver apk_data_file:file { read getattr };
     44 allow mediaserver asec_apk_file:file { read getattr };
     45 allow mediaserver ringtone_file:file { read getattr };
     46 
     47 # Read /data/data/com.android.providers.telephony files passed over Binder.
     48 allow mediaserver radio_data_file:file { read getattr };
     49 
     50 # Use pipes passed over Binder from app domains.
     51 allow mediaserver appdomain:fifo_file { getattr read write };
     52 
     53 allow mediaserver rpmsg_device:chr_file rw_file_perms;
     54 
     55 # Inter System processes communicate over named pipe (FIFO)
     56 allow mediaserver system_server:fifo_file r_file_perms;
     57 
     58 r_dir_file(mediaserver, media_rw_data_file)
     59 
     60 # Grant access to read files on appfuse.
     61 allow mediaserver app_fuse_file:file { read getattr };
     62 
     63 # Read/[write] to /proc/net/xt_qtaguid/ctrl and /dev/xt_qtaguid
     64 allow mediaserver qtaguid_proc:file rw_file_perms;
     65 allow mediaserver qtaguid_device:chr_file r_file_perms;
     66 
     67 # Needed on some devices for playing DRM protected content,
     68 # but seems expected and appropriate for all devices.
     69 unix_socket_connect(mediaserver, drmserver, drmserver)
     70 
     71 # Needed on some devices for playing audio on paired BT device,
     72 # but seems appropriate for all devices.
     73 unix_socket_connect(mediaserver, bluetooth, bluetooth)
     74 
     75 add_service(mediaserver, mediaserver_service)
     76 allow mediaserver activity_service:service_manager find;
     77 allow mediaserver appops_service:service_manager find;
     78 allow mediaserver audioserver_service:service_manager find;
     79 allow mediaserver cameraserver_service:service_manager find;
     80 allow mediaserver batterystats_service:service_manager find;
     81 allow mediaserver drmserver_service:service_manager find;
     82 allow mediaserver mediaextractor_service:service_manager find;
     83 allow mediaserver mediacodec_service:service_manager find;
     84 allow mediaserver mediametrics_service:service_manager find;
     85 allow mediaserver media_session_service:service_manager find;
     86 allow mediaserver permission_service:service_manager find;
     87 allow mediaserver power_service:service_manager find;
     88 allow mediaserver processinfo_service:service_manager find;
     89 allow mediaserver scheduling_policy_service:service_manager find;
     90 allow mediaserver surfaceflinger_service:service_manager find;
     91 
     92 # for ModDrm/MediaPlayer
     93 allow mediaserver mediadrmserver_service:service_manager find;
     94 
     95 # For interfacing with OMX HAL
     96 allow mediaserver hidl_token_hwservice:hwservice_manager find;
     97 
     98 # /oem access
     99 allow mediaserver oemfs:dir search;
    100 allow mediaserver oemfs:file r_file_perms;
    101 
    102 use_drmservice(mediaserver)
    103 allow mediaserver drmserver:drmservice {
    104     consumeRights
    105     setPlaybackStatus
    106     openDecryptSession
    107     closeDecryptSession
    108     initializeDecryptUnit
    109     decrypt
    110     finalizeDecryptUnit
    111     pread
    112 };
    113 
    114 # only allow unprivileged socket ioctl commands
    115 allowxperm mediaserver self:{ rawip_socket tcp_socket udp_socket }
    116   ioctl { unpriv_sock_ioctls unpriv_tty_ioctls };
    117 
    118 # Access to /data/media.
    119 # This should be removed if sdcardfs is modified to alter the secontext for its
    120 # accesses to the underlying FS.
    121 allow mediaserver media_rw_data_file:dir create_dir_perms;
    122 allow mediaserver media_rw_data_file:file create_file_perms;
    123 
    124 # Access to media in /data/preloads
    125 allow mediaserver preloads_media_file:file { getattr read ioctl };
    126 
    127 allow mediaserver ion_device:chr_file r_file_perms;
    128 allow mediaserver hal_graphics_allocator:fd use;
    129 allow mediaserver hal_graphics_composer:fd use;
    130 allow mediaserver hal_camera:fd use;
    131 
    132 allow mediaserver system_server:fd use;
    133 
    134 hal_client_domain(mediaserver, hal_allocator)
    135 
    136 binder_call(mediaserver, mediacodec)
    137 
    138 ###
    139 ### neverallow rules
    140 ###
    141 
    142 # mediaserver should never execute any executable without a
    143 # domain transition
    144 neverallow mediaserver { file_type fs_type }:file execute_no_trans;
    145 
    146 # do not allow privileged socket ioctl commands
    147 neverallowxperm mediaserver domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
    148