805824884f
Bug: 65551293 Bug: 69390067 Test: None. Prebuilt only change. Change-Id: I62304b342a8b52fd505892cc2d4ebc882148224b
581 lines
19 KiB
Text
581 lines
19 KiB
Text
#####################################
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# domain_trans(olddomain, type, newdomain)
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# Allow a transition from olddomain to newdomain
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# upon executing a file labeled with type.
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# This only allows the transition; it does not
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# cause it to occur automatically - use domain_auto_trans
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# if that is what you want.
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#
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define(`domain_trans', `
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# Old domain may exec the file and transition to the new domain.
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allow $1 $2:file { getattr open read execute map };
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allow $1 $3:process transition;
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# New domain is entered by executing the file.
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allow $3 $2:file { entrypoint open read execute getattr map };
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# New domain can send SIGCHLD to its caller.
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ifelse($1, `init', `', `allow $3 $1:process sigchld;')
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# Enable AT_SECURE, i.e. libc secure mode.
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dontaudit $1 $3:process noatsecure;
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# XXX dontaudit candidate but requires further study.
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allow $1 $3:process { siginh rlimitinh };
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')
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#####################################
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# domain_auto_trans(olddomain, type, newdomain)
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# Automatically transition from olddomain to newdomain
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# upon executing a file labeled with type.
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#
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define(`domain_auto_trans', `
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# Allow the necessary permissions.
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domain_trans($1,$2,$3)
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# Make the transition occur by default.
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type_transition $1 $2:process $3;
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')
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#####################################
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# file_type_trans(domain, dir_type, file_type)
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# Allow domain to create a file labeled file_type in a
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# directory labeled dir_type.
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# This only allows the transition; it does not
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# cause it to occur automatically - use file_type_auto_trans
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# if that is what you want.
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#
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define(`file_type_trans', `
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# Allow the domain to add entries to the directory.
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allow $1 $2:dir ra_dir_perms;
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# Allow the domain to create the file.
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allow $1 $3:notdevfile_class_set create_file_perms;
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allow $1 $3:dir create_dir_perms;
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')
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#####################################
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# file_type_auto_trans(domain, dir_type, file_type)
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# Automatically label new files with file_type when
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# they are created by domain in directories labeled dir_type.
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#
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define(`file_type_auto_trans', `
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# Allow the necessary permissions.
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file_type_trans($1, $2, $3)
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# Make the transition occur by default.
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type_transition $1 $2:dir $3;
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type_transition $1 $2:notdevfile_class_set $3;
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')
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#####################################
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# r_dir_file(domain, type)
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# Allow the specified domain to read directories, files
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# and symbolic links of the specified type.
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define(`r_dir_file', `
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allow $1 $2:dir r_dir_perms;
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allow $1 $2:{ file lnk_file } r_file_perms;
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')
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#####################################
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# tmpfs_domain(domain)
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# Define and allow access to a unique type for
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# this domain when creating tmpfs / shmem / ashmem files.
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define(`tmpfs_domain', `
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type $1_tmpfs, file_type;
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type_transition $1 tmpfs:file $1_tmpfs;
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allow $1 $1_tmpfs:file { read write getattr };
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allow $1 tmpfs:dir { getattr search };
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')
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# pdx macros for IPC. pdx is a high-level name which contains transport-specific
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# rules from underlying transport (e.g. UDS-based implementation).
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#####################################
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# pdx_service_attributes(service)
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# Defines type attribute used to identify various service-related types.
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define(`pdx_service_attributes', `
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attribute pdx_$1_endpoint_dir_type;
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attribute pdx_$1_endpoint_socket_type;
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attribute pdx_$1_channel_socket_type;
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attribute pdx_$1_server_type;
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')
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#####################################
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# pdx_service_socket_types(service, endpoint_dir_t)
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# Define types for endpoint and channel sockets.
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define(`pdx_service_socket_types', `
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typeattribute $2 pdx_$1_endpoint_dir_type;
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type pdx_$1_endpoint_socket, pdx_$1_endpoint_socket_type, pdx_endpoint_socket_type, file_type, coredomain_socket, mlstrustedobject, mlstrustedsubject;
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type pdx_$1_channel_socket, pdx_$1_channel_socket_type, pdx_channel_socket_type, coredomain_socket;
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userdebug_or_eng(`
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dontaudit su pdx_$1_endpoint_socket:unix_stream_socket *;
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dontaudit su pdx_$1_channel_socket:unix_stream_socket *;
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')
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')
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#####################################
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# pdx_server(server_domain, service)
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define(`pdx_server', `
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# Mark the server domain as a PDX server.
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typeattribute $1 pdx_$2_server_type;
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# Allow the init process to create the initial endpoint socket.
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allow init pdx_$2_endpoint_socket_type:unix_stream_socket { create bind };
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# Allow the server domain to use the endpoint socket and accept connections on it.
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# Not using macro like "rw_socket_perms_no_ioctl" because it provides more rights
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# than we need (e.g. we don"t need "bind" or "connect").
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allow $1 pdx_$2_endpoint_socket_type:unix_stream_socket { read getattr write setattr lock append getopt setopt shutdown listen accept };
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# Allow the server domain to apply security context label to the channel socket pair (allow process to use setsockcreatecon_raw()).
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allow $1 self:process setsockcreate;
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# Allow the server domain to create a client channel socket.
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allow $1 pdx_$2_channel_socket_type:unix_stream_socket create_stream_socket_perms;
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# Prevent other processes from claiming to be a server for the same service.
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neverallow {domain -$1} pdx_$2_endpoint_socket_type:unix_stream_socket { listen accept };
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')
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#####################################
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# pdx_connect(client, service)
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define(`pdx_connect', `
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# Allow client to open the service endpoint file.
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allow $1 pdx_$2_endpoint_dir_type:dir r_dir_perms;
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allow $1 pdx_$2_endpoint_socket_type:sock_file rw_file_perms;
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# Allow the client to connect to endpoint socket.
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allow $1 pdx_$2_endpoint_socket_type:unix_stream_socket { connectto read write shutdown };
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')
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#####################################
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# pdx_use(client, service)
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define(`pdx_use', `
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# Allow the client to use the PDX channel socket.
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# Not using macro like "rw_socket_perms_no_ioctl" because it provides more rights
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# than we need (e.g. we don"t need "bind" or "connect").
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allow $1 pdx_$2_channel_socket_type:unix_stream_socket { read getattr write setattr lock append getopt setopt shutdown };
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# Client needs to use an channel event fd from the server.
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allow $1 pdx_$2_server_type:fd use;
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# Servers may receive sync fences, gralloc buffers, etc, from clients.
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# This could be tightened on a per-server basis, but keeping track of service
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# clients is error prone.
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allow pdx_$2_server_type $1:fd use;
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')
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#####################################
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# pdx_client(client, service)
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define(`pdx_client', `
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pdx_connect($1, $2)
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pdx_use($1, $2)
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')
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#####################################
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# init_daemon_domain(domain)
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# Set up a transition from init to the daemon domain
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# upon executing its binary.
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define(`init_daemon_domain', `
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domain_auto_trans(init, $1_exec, $1)
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tmpfs_domain($1)
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')
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#####################################
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# app_domain(domain)
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# Allow a base set of permissions required for all apps.
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define(`app_domain', `
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typeattribute $1 appdomain;
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# Label ashmem objects with our own unique type.
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tmpfs_domain($1)
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# Map with PROT_EXEC.
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allow $1 $1_tmpfs:file execute;
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')
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#####################################
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# untrusted_app_domain(domain)
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# Allow a base set of permissions required for all untrusted apps.
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define(`untrusted_app_domain', `
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typeattribute $1 untrusted_app_all;
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')
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#####################################
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# net_domain(domain)
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# Allow a base set of permissions required for network access.
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define(`net_domain', `
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typeattribute $1 netdomain;
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')
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#####################################
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# bluetooth_domain(domain)
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# Allow a base set of permissions required for bluetooth access.
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define(`bluetooth_domain', `
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typeattribute $1 bluetoothdomain;
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')
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#####################################
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# hal_server_domain(domain, hal_type)
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# Allow a base set of permissions required for a domain to offer a
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# HAL implementation of the specified type over HwBinder.
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#
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# For example, default implementation of Foo HAL:
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# type hal_foo_default, domain;
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# hal_server_domain(hal_foo_default, hal_foo)
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#
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define(`hal_server_domain', `
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typeattribute $1 halserverdomain;
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typeattribute $1 $2_server;
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typeattribute $1 $2;
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')
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#####################################
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# hal_client_domain(domain, hal_type)
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# Allow a base set of permissions required for a domain to be a
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# client of a HAL of the specified type.
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#
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# For example, make some_domain a client of Foo HAL:
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# hal_client_domain(some_domain, hal_foo)
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#
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define(`hal_client_domain', `
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typeattribute $1 halclientdomain;
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typeattribute $1 $2_client;
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# TODO(b/34170079): Make the inclusion of the rules below conditional also on
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# non-Treble devices. For now, on non-Treble device, always grant clients of a
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# HAL sufficient access to run the HAL in passthrough mode (i.e., in-process).
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not_full_treble(`
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typeattribute $1 $2;
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# Find passthrough HAL implementations
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allow $2 system_file:dir r_dir_perms;
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allow $2 vendor_file:dir r_dir_perms;
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allow $2 vendor_file:file { read open getattr execute map };
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')
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')
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#####################################
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# passthrough_hal_client_domain(domain, hal_type)
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# Allow a base set of permissions required for a domain to be a
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# client of a passthrough HAL of the specified type.
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#
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# For example, make some_domain a client of passthrough Foo HAL:
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# passthrough_hal_client_domain(some_domain, hal_foo)
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#
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define(`passthrough_hal_client_domain', `
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typeattribute $1 halclientdomain;
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typeattribute $1 $2_client;
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typeattribute $1 $2;
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# Find passthrough HAL implementations
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allow $2 system_file:dir r_dir_perms;
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allow $2 vendor_file:dir r_dir_perms;
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allow $2 vendor_file:file { read open getattr execute map };
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')
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#####################################
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# unix_socket_connect(clientdomain, socket, serverdomain)
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# Allow a local socket connection from clientdomain via
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# socket to serverdomain.
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#
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# Note: If you see denial records that distill to the
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# following allow rules:
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# allow clientdomain property_socket:sock_file write;
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# allow clientdomain init:unix_stream_socket connectto;
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# allow clientdomain something_prop:property_service set;
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#
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# This sequence is indicative of attempting to set a property.
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# use set_prop(sourcedomain, targetproperty)
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#
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define(`unix_socket_connect', `
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ifelse($2, `property', `
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ifelse($3,`init', `
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print(`deprecated: unix_socket_connect($1, $2, $3) Please use set_prop($1, <property name>) instead.')
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')
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')
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__unix_socket_connect__($1, $2, $3)
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')
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define(`__unix_socket_connect__', `
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allow $1 $2_socket:sock_file write;
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allow $1 $3:unix_stream_socket connectto;
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')
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#####################################
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# set_prop(sourcedomain, targetproperty)
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# Allows source domain to set the
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# targetproperty.
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#
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define(`set_prop', `
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__unix_socket_connect__($1, property, init)
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allow $1 $2:property_service set;
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get_prop($1, $2)
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')
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#####################################
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# get_prop(sourcedomain, targetproperty)
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# Allows source domain to read the
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# targetproperty.
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#
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define(`get_prop', `
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allow $1 $2:file r_file_perms;
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')
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#####################################
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# unix_socket_send(clientdomain, socket, serverdomain)
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# Allow a local socket send from clientdomain via
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# socket to serverdomain.
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define(`unix_socket_send', `
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allow $1 $2_socket:sock_file write;
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allow $1 $3:unix_dgram_socket sendto;
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')
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#####################################
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# binder_use(domain)
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# Allow domain to use Binder IPC.
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define(`binder_use', `
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# Call the servicemanager and transfer references to it.
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allow $1 servicemanager:binder { call transfer };
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# servicemanager performs getpidcon on clients.
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allow servicemanager $1:dir search;
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allow servicemanager $1:file { read open };
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allow servicemanager $1:process getattr;
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# rw access to /dev/binder and /dev/ashmem is presently granted to
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# all domains in domain.te.
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')
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#####################################
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# hwbinder_use(domain)
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# Allow domain to use HwBinder IPC.
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define(`hwbinder_use', `
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# Call the hwservicemanager and transfer references to it.
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allow $1 hwservicemanager:binder { call transfer };
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# Allow hwservicemanager to send out callbacks
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allow hwservicemanager $1:binder { call transfer };
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# hwservicemanager performs getpidcon on clients.
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allow hwservicemanager $1:dir search;
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allow hwservicemanager $1:file { read open };
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allow hwservicemanager $1:process getattr;
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# rw access to /dev/hwbinder and /dev/ashmem is presently granted to
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# all domains in domain.te.
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')
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#####################################
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# vndbinder_use(domain)
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# Allow domain to use Binder IPC.
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define(`vndbinder_use', `
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# Talk to the vndbinder device node
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allow $1 vndbinder_device:chr_file rw_file_perms;
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# Call the vndservicemanager and transfer references to it.
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allow $1 vndservicemanager:binder { call transfer };
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# vndservicemanager performs getpidcon on clients.
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allow vndservicemanager $1:dir search;
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allow vndservicemanager $1:file { read open };
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allow vndservicemanager $1:process getattr;
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')
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#####################################
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# binder_call(clientdomain, serverdomain)
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# Allow clientdomain to perform binder IPC to serverdomain.
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define(`binder_call', `
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# Call the server domain and optionally transfer references to it.
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allow $1 $2:binder { call transfer };
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# Allow the serverdomain to transfer references to the client on the reply.
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allow $2 $1:binder transfer;
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# Receive and use open files from the server.
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allow $1 $2:fd use;
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')
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#####################################
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# binder_service(domain)
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# Mark a domain as being a Binder service domain.
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# Used to allow binder IPC to the various system services.
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define(`binder_service', `
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typeattribute $1 binderservicedomain;
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')
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#####################################
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# wakelock_use(domain)
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# Allow domain to manage wake locks
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define(`wakelock_use', `
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# Access /sys/power/wake_lock and /sys/power/wake_unlock
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allow $1 sysfs_wake_lock:file rw_file_perms;
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# Accessing these files requires CAP_BLOCK_SUSPEND
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allow $1 self:capability2 block_suspend;
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')
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#####################################
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# selinux_check_access(domain)
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# Allow domain to check SELinux permissions via selinuxfs.
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define(`selinux_check_access', `
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r_dir_file($1, selinuxfs)
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allow $1 selinuxfs:file w_file_perms;
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allow $1 kernel:security compute_av;
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allow $1 self:netlink_selinux_socket { read write create getattr setattr lock relabelfrom relabelto append bind connect listen accept getopt setopt shutdown recvfrom sendto name_bind };
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')
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#####################################
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# selinux_check_context(domain)
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# Allow domain to check SELinux contexts via selinuxfs.
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define(`selinux_check_context', `
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r_dir_file($1, selinuxfs)
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allow $1 selinuxfs:file w_file_perms;
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allow $1 kernel:security check_context;
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')
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#####################################
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# create_pty(domain)
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# Allow domain to create and use a pty, isolated from any other domain ptys.
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define(`create_pty', `
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# Each domain gets a unique devpts type.
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type $1_devpts, fs_type;
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# Label the pty with the unique type when created.
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type_transition $1 devpts:chr_file $1_devpts;
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# Allow use of the pty after creation.
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allow $1 $1_devpts:chr_file { open getattr read write ioctl };
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allowxperm $1 $1_devpts:chr_file ioctl unpriv_tty_ioctls;
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# TIOCSTI is only ever used for exploits. Block it.
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# b/33073072, b/7530569
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# http://www.openwall.com/lists/oss-security/2016/09/26/14
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neverallowxperm * $1_devpts:chr_file ioctl TIOCSTI;
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# Note: devpts:dir search and ptmx_device:chr_file rw_file_perms
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# allowed to everyone via domain.te.
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')
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#####################################
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# Non system_app application set
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#
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define(`non_system_app_set', `{ appdomain -system_app }')
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#####################################
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# Recovery only
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# SELinux rules which apply only to recovery mode
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#
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define(`recovery_only', ifelse(target_recovery, `true', $1, ))
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#####################################
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# Full TREBLE only
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# SELinux rules which apply only to full TREBLE devices
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#
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define(`full_treble_only', ifelse(target_full_treble, `true', $1,
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ifelse(target_full_treble, `cts',
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# BEGIN_TREBLE_ONLY -- this marker is used by CTS -- do not modify
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$1
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# END_TREBLE_ONLY -- this marker is used by CTS -- do not modify
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, )))
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#####################################
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# Not full TREBLE
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# SELinux rules which apply only to devices which are not full TREBLE devices
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#
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define(`not_full_treble', ifelse(target_full_treble, `true', , $1))
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#####################################
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# Userdebug or eng builds
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# SELinux rules which apply only to userdebug or eng builds
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#
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define(`userdebug_or_eng', ifelse(target_build_variant, `eng', $1, ifelse(target_build_variant, `userdebug', $1)))
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#####################################
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# User builds
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# SELinux rules which apply only to user builds
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#
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define(`userbuild', ifelse(target_build_variant, `user', $1, ))
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|
|
|
#####################################
|
|
# asan builds
|
|
# SELinux rules which apply only to asan builds
|
|
#
|
|
define(`with_asan', ifelse(target_with_asan, `true', userdebug_or_eng(`$1'), ))
|
|
|
|
####################################
|
|
# Fallback crash handling for processes that can't exec crash_dump (e.g. because of seccomp).
|
|
#
|
|
define(`crash_dump_fallback', `
|
|
userdebug_or_eng(`
|
|
allow $1 su:fifo_file append;
|
|
')
|
|
allow $1 anr_data_file:file append;
|
|
allow $1 dumpstate:fd use;
|
|
# TODO: Figure out why write is needed.
|
|
allow $1 dumpstate:fifo_file { append write };
|
|
allow $1 system_server:fifo_file { append write };
|
|
allow $1 tombstoned:unix_stream_socket connectto;
|
|
allow $1 tombstoned:fd use;
|
|
allow $1 tombstoned_crash_socket:sock_file write;
|
|
allow $1 tombstone_data_file:file append;
|
|
')
|
|
|
|
#####################################
|
|
# WITH_DEXPREOPT builds
|
|
# SELinux rules which apply only when pre-opting.
|
|
#
|
|
define(`with_dexpreopt', ifelse(target_with_dexpreopt, `true', $1))
|
|
|
|
#####################################
|
|
# write_logd(domain)
|
|
# Ability to write to android log
|
|
# daemon via sockets
|
|
define(`write_logd', `
|
|
unix_socket_send($1, logdw, logd)
|
|
allow $1 pmsg_device:chr_file w_file_perms;
|
|
')
|
|
|
|
#####################################
|
|
# read_logd(domain)
|
|
# Ability to run logcat and read from android
|
|
# log daemon via sockets
|
|
define(`read_logd', `
|
|
allow $1 logcat_exec:file rx_file_perms;
|
|
unix_socket_connect($1, logdr, logd)
|
|
')
|
|
|
|
#####################################
|
|
# read_runtime_log_tags(domain)
|
|
# ability to directly map the runtime event log tags
|
|
define(`read_runtime_log_tags', `
|
|
allow $1 runtime_event_log_tags_file:file r_file_perms;
|
|
')
|
|
|
|
#####################################
|
|
# control_logd(domain)
|
|
# Ability to control
|
|
# android log daemon via sockets
|
|
define(`control_logd', `
|
|
# Group AID_LOG checked by filesystem & logd
|
|
# to permit control commands
|
|
unix_socket_connect($1, logd, logd)
|
|
')
|
|
|
|
#####################################
|
|
# use_keystore(domain)
|
|
# Ability to use keystore.
|
|
# Keystore is requires the following permissions
|
|
# to call getpidcon.
|
|
define(`use_keystore', `
|
|
allow keystore $1:dir search;
|
|
allow keystore $1:file { read open };
|
|
allow keystore $1:process getattr;
|
|
allow $1 keystore_service:service_manager find;
|
|
binder_call($1, keystore)
|
|
')
|
|
|
|
###########################################
|
|
# use_drmservice(domain)
|
|
# Ability to use DrmService which requires
|
|
# DrmService to call getpidcon.
|
|
define(`use_drmservice', `
|
|
allow drmserver $1:dir search;
|
|
allow drmserver $1:file { read open };
|
|
allow drmserver $1:process getattr;
|
|
')
|
|
|
|
###########################################
|
|
# add_service(domain, service)
|
|
# Ability for domain to add a service to service_manager
|
|
# and find it. It also creates a neverallow preventing
|
|
# others from adding it.
|
|
define(`add_service', `
|
|
allow $1 $2:service_manager { add find };
|
|
neverallow { domain -$1 } $2:service_manager add;
|
|
')
|
|
|
|
###########################################
|
|
# add_hwservice(domain, service)
|
|
# Ability for domain to add a service to hwservice_manager
|
|
# and find it. It also creates a neverallow preventing
|
|
# others from adding it.
|
|
define(`add_hwservice', `
|
|
allow $1 $2:hwservice_manager { add find };
|
|
allow $1 hidl_base_hwservice:hwservice_manager add;
|
|
neverallow { domain -$1 } $2:hwservice_manager add;
|
|
')
|
|
|
|
##########################################
|
|
# print a message with a trailing newline
|
|
# print(`args')
|
|
define(`print', `errprint(`m4: '__file__: __line__`: $*
|
|
')')
|