9b2e0cbeea
In kernel 4.7, the capability and capability2 classes were split apart
from cap_userns and cap2_userns (see kernel commit
8e4ff6f228e4722cac74db716e308d1da33d744f). Since then, Android cannot be
run in a container with SELinux in enforcing mode.
This change applies the existing capability rules to user namespaces as
well as the root namespace so that Android running in a container
behaves the same on pre- and post-4.7 kernels.
This is essentially:
1. New global_capability_class_set and global_capability2_class_set
that match capability+cap_userns and capability2+cap2_userns,
respectively.
2. s/self:capability/self:global_capability_class_set/g
3. s/self:capability2/self:global_capability2_class_set/g
4. Add cap_userns and cap2_userns to the existing capability_class_set
so that it covers all capabilities. This set was used by several
neverallow and dontaudit rules, and I confirmed that the new
classes are still appropriate.
Test: diff new policy against old and confirm that all new rules add
only cap_userns or cap2_userns;
Boot ARC++ on a device with the 4.12 kernel.
Bug: crbug.com/754831
Change-Id: I4007eb3a2ecd01b062c4c78d9afee71c530df95f
114 lines
3.8 KiB
Text
114 lines
3.8 KiB
Text
# surfaceflinger - display compositor service
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typeattribute surfaceflinger coredomain;
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type surfaceflinger_exec, exec_type, file_type;
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init_daemon_domain(surfaceflinger)
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typeattribute surfaceflinger mlstrustedsubject;
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typeattribute surfaceflinger display_service_server;
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read_runtime_log_tags(surfaceflinger)
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# Perform HwBinder IPC.
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hal_client_domain(surfaceflinger, hal_graphics_allocator)
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hal_client_domain(surfaceflinger, hal_graphics_composer)
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hal_client_domain(surfaceflinger, hal_configstore)
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allow surfaceflinger hidl_token_hwservice:hwservice_manager find;
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# Perform Binder IPC.
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binder_use(surfaceflinger)
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binder_call(surfaceflinger, binderservicedomain)
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binder_call(surfaceflinger, appdomain)
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binder_call(surfaceflinger, bootanim)
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binder_service(surfaceflinger)
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# Binder IPC to bu, presently runs in adbd domain.
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binder_call(surfaceflinger, adbd)
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# Read /proc/pid files for Binder clients.
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r_dir_file(surfaceflinger, binderservicedomain)
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r_dir_file(surfaceflinger, appdomain)
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# Access the GPU.
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allow surfaceflinger gpu_device:chr_file rw_file_perms;
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# Access /dev/graphics/fb0.
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allow surfaceflinger graphics_device:dir search;
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allow surfaceflinger graphics_device:chr_file rw_file_perms;
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# Access /dev/video1.
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allow surfaceflinger video_device:dir r_dir_perms;
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allow surfaceflinger video_device:chr_file rw_file_perms;
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# Create and use netlink kobject uevent sockets.
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allow surfaceflinger self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;
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# Set properties.
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set_prop(surfaceflinger, system_prop)
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set_prop(surfaceflinger, ctl_bootanim_prop)
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# Use open files supplied by an app.
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allow surfaceflinger appdomain:fd use;
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allow surfaceflinger app_data_file:file { read write };
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# Allow writing surface traces to /data/misc/wmtrace.
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userdebug_or_eng(`
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allow surfaceflinger wm_trace_data_file:dir rw_dir_perms;
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allow surfaceflinger wm_trace_data_file:file { getattr setattr create w_file_perms };
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')
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# Use socket supplied by adbd, for cmd gpu vkjson etc.
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allow surfaceflinger adbd:unix_stream_socket { read write getattr };
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# Allow a dumpstate triggered screenshot
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binder_call(surfaceflinger, dumpstate)
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binder_call(surfaceflinger, shell)
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r_dir_file(surfaceflinger, dumpstate)
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# Needed on some devices for playing DRM protected content,
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# but seems expected and appropriate for all devices.
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allow surfaceflinger tee_device:chr_file rw_file_perms;
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# media.player service
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add_service(surfaceflinger, gpu_service)
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# do not use add_service() as hal_graphics_composer_default may be the
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# provider as well
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#add_service(surfaceflinger, surfaceflinger_service)
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allow surfaceflinger surfaceflinger_service:service_manager { add find };
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allow surfaceflinger mediaserver_service:service_manager find;
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allow surfaceflinger permission_service:service_manager find;
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allow surfaceflinger power_service:service_manager find;
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allow surfaceflinger vr_manager_service:service_manager find;
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allow surfaceflinger window_service:service_manager find;
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# allow self to set SCHED_FIFO
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allow surfaceflinger self:global_capability_class_set sys_nice;
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allow surfaceflinger proc_meminfo:file r_file_perms;
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r_dir_file(surfaceflinger, cgroup)
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r_dir_file(surfaceflinger, system_file)
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allow surfaceflinger tmpfs:dir r_dir_perms;
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allow surfaceflinger system_server:fd use;
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allow surfaceflinger ion_device:chr_file r_file_perms;
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# pdx IPC
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pdx_server(surfaceflinger, display_client)
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pdx_server(surfaceflinger, display_manager)
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pdx_server(surfaceflinger, display_screenshot)
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pdx_server(surfaceflinger, display_vsync)
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pdx_client(surfaceflinger, bufferhub_client)
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pdx_client(surfaceflinger, performance_client)
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###
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### Neverallow rules
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###
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### surfaceflinger should NEVER do any of this
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# Do not allow accessing SDcard files as unsafe ejection could
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# cause the kernel to kill the process.
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neverallow surfaceflinger sdcard_type:file rw_file_perms;
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