6a28b68d54
Commit 7688161 "hal_*_(client|server) => hal(client|server)domain"
added neverallow rules on hal_*_client attributes while simultaneously
expanding these attribute which causes them to fail CTS neverallow
tests. Remove these neverallow rules as they do not impose specific
security properties that we want to enforce.
Modify Other neverallow failures which were imposed on hal_foo
attributes and should have been enforced on hal_foo_server attributes
instead.
Bug: 69566734
Test: cts-tradefed run cts -m CtsSecurityHostTestCases -t \
android.cts.security.SELinuxNeverallowRulesTest
CtsSecurityHostTestCases completed in 7s. 627 passed, 1 failed
remaining failure appears to be caused by b/68133473
Test: build taimen-user/userdebug
Change-Id: I619e71529e078235ed30dc06c60e6e448310fdbc
592 lines
20 KiB
Text
592 lines
20 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 map };
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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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neverallow { $1 -shell } { domain -$1 }:file no_rw_file_perms;
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neverallow { appdomain -shell -$1 } $1:file no_rw_file_perms;
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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_attribute(hal_name)
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# Add an attribute for hal implementations along with necessary
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# restrictions.
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define(`hal_attribute', `
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attribute hal_$1;
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expandattribute hal_$1 true;
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attribute hal_$1_client;
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expandattribute hal_$1_client true;
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attribute hal_$1_server;
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expandattribute hal_$1_server false;
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neverallow { hal_$1_server -halserverdomain } domain:process fork;
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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:global_capability2_class_set 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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#####################################
|
|
# Full TREBLE only
|
|
# SELinux rules which apply only to full TREBLE devices
|
|
#
|
|
define(`full_treble_only', ifelse(target_full_treble, `true', $1,
|
|
ifelse(target_full_treble, `cts',
|
|
# BEGIN_TREBLE_ONLY -- this marker is used by CTS -- do not modify
|
|
$1
|
|
# END_TREBLE_ONLY -- this marker is used by CTS -- do not modify
|
|
, )))
|
|
|
|
#####################################
|
|
# Not full TREBLE
|
|
# SELinux rules which apply only to devices which are not full TREBLE devices
|
|
#
|
|
define(`not_full_treble', ifelse(target_full_treble, `true', , $1))
|
|
|
|
#####################################
|
|
# Userdebug or eng builds
|
|
# SELinux rules which apply only to userdebug or eng builds
|
|
#
|
|
define(`userdebug_or_eng', ifelse(target_build_variant, `eng', $1, ifelse(target_build_variant, `userdebug', $1)))
|
|
|
|
#####################################
|
|
# 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__`: $*
|
|
')')
|