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41 results

CleanSpec.mk

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  • mediaserver.te 4.67 KiB
    # mediaserver - multimedia daemon
    type mediaserver, domain, domain_deprecated;
    type mediaserver_exec, exec_type, file_type;
    
    typeattribute mediaserver mlstrustedsubject;
    
    net_domain(mediaserver)
    init_daemon_domain(mediaserver)
    
    r_dir_file(mediaserver, sdcard_type)
    
    # stat /proc/self
    allow mediaserver proc:lnk_file getattr;
    
    # open /vendor/lib/mediadrm
    allow mediaserver system_file:dir r_dir_perms;
    
    userdebug_or_eng(`
      # ptrace to processes in the same domain for memory leak detection
      allow mediaserver self:process ptrace;
    ')
    
    binder_use(mediaserver)
    binder_call(mediaserver, binderservicedomain)
    binder_call(mediaserver, { appdomain autoplay_app })
    binder_service(mediaserver)
    
    allow mediaserver media_data_file:dir create_dir_perms;
    allow mediaserver media_data_file:file create_file_perms;
    allow mediaserver app_data_file:dir search;
    allow mediaserver app_data_file:file rw_file_perms;
    allow mediaserver sdcard_type:file write;
    allow mediaserver gpu_device:chr_file rw_file_perms;
    allow mediaserver video_device:dir r_dir_perms;
    allow mediaserver video_device:chr_file rw_file_perms;
    
    set_prop(mediaserver, audio_prop)
    
    # XXX Label with a specific type?
    allow mediaserver sysfs:file r_file_perms;
    
    # Read resources from open apk files passed over Binder.
    allow mediaserver apk_data_file:file { read getattr };
    allow mediaserver asec_apk_file:file { read getattr };
    allow mediaserver ringtone_file:file { read getattr };
    
    # Read /data/data/com.android.providers.telephony files passed over Binder.
    allow mediaserver radio_data_file:file { read getattr };
    
    # Use pipes passed over Binder from app domains.
    allow mediaserver { appdomain autoplay_app }:fifo_file { getattr read write };
    
    allow mediaserver rpmsg_device:chr_file rw_file_perms;
    
    # Inter System processes communicate over named pipe (FIFO)
    allow mediaserver system_server:fifo_file r_file_perms;
    
    r_dir_file(mediaserver, media_rw_data_file)
    
    # Grant access to read files on appfuse.
    allow mediaserver app_fuse_file:file { read getattr };
    
    # Read/[write] to /proc/net/xt_qtaguid/ctrl and /dev/xt_qtaguid
    allow mediaserver qtaguid_proc:file rw_file_perms;
    allow mediaserver qtaguid_device:chr_file r_file_perms;
    
    # Allow abstract socket connection
    allow mediaserver rild:unix_stream_socket { connectto read write setopt };
    
    # Needed on some devices for playing DRM protected content,
    # but seems expected and appropriate for all devices.
    unix_socket_connect(mediaserver, drmserver, drmserver)
    
    # Needed on some devices for playing audio on paired BT device,
    # but seems appropriate for all devices.
    unix_socket_connect(mediaserver, bluetooth, bluetooth)
    
    # Connect to tee service.
    allow mediaserver tee:unix_stream_socket connectto;
    
    allow mediaserver activity_service:service_manager find;
    allow mediaserver appops_service:service_manager find;
    allow mediaserver audioserver_service:service_manager find;
    allow mediaserver cameraserver_service:service_manager find;
    allow mediaserver batterystats_service:service_manager find;
    allow mediaserver drmserver_service:service_manager find;
    allow mediaserver mediaextractor_service:service_manager find;
    allow mediaserver mediacodec_service:service_manager find;
    allow mediaserver mediaserver_service:service_manager { add find };
    allow mediaserver media_session_service:service_manager find;
    allow mediaserver permission_service:service_manager find;
    allow mediaserver power_service:service_manager find;
    allow mediaserver processinfo_service:service_manager find;
    allow mediaserver scheduling_policy_service:service_manager find;
    allow mediaserver surfaceflinger_service:service_manager find;
    
    # /oem access
    allow mediaserver oemfs:dir search;
    allow mediaserver oemfs:file r_file_perms;
    
    use_drmservice(mediaserver)
    allow mediaserver drmserver:drmservice {
        consumeRights
        setPlaybackStatus
        openDecryptSession
        closeDecryptSession
        initializeDecryptUnit
        decrypt
        finalizeDecryptUnit
        pread
    };
    
    # only allow unprivileged socket ioctl commands
    allowxperm mediaserver self:{ rawip_socket tcp_socket udp_socket }
      ioctl { unpriv_sock_ioctls unpriv_tty_ioctls };
    
    # Access to /data/media.
    # This should be removed if sdcardfs is modified to alter the secontext for its
    # accesses to the underlying FS.
    allow mediaserver media_rw_data_file:dir create_dir_perms;
    allow mediaserver media_rw_data_file:file create_file_perms;
    
    # Access to /data/preloads
    allow mediaserver preloads_data_file:file { getattr read ioctl };
    
    ###
    ### neverallow rules
    ###
    
    # mediaserver should never execute any executable without a
    # domain transition
    neverallow mediaserver { file_type fs_type }:file execute_no_trans;
    
    # do not allow privileged socket ioctl commands
    neverallowxperm mediaserver domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;