Add sepolicy for hwcomposer HAL

Allow SurfaceFlinger to call into IComposer, and vice versa for
IComposerCallback.

Specifically,

hwbinder_use(...) for
avc: denied { call } for scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:hwservicemanager:s0 tclass=binder permissive=1
avc: denied { transfer } for scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:hwservicemanager:s0 tclass=binder permissive=1

binder_call(..., surfaceflinger) for
avc: denied { call } for scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:surfaceflinger:s0 tclass=binder permissive=1

allow ... gpu_device:chr_file rw_file_perms for
avc: denied { read write } for name="kgsl-3d0" dev="tmpfs" ino=14956 scontext=u:r:hal_graphics_composer:s0 tcontext=u:object_r:gpu_device:s0 tclass=chr_file permissive=1
avc: denied { open } for path="/dev/kgsl-3d0" dev="tmpfs" ino=14956 scontext=u:r:hal_graphics_composer:s0 tcontext=u:object_r:gpu_device:s0 tclass=chr_file permissive=1
avc: denied { ioctl } for path="/dev/kgsl-3d0" dev="tmpfs" ino=14956 ioctlcmd=940 scontext=u:r:hal_graphics_composer:s0 tcontext=u:object_r:gpu_device:s0 tclass=chr_file permissive=1

allow ... ion_device:chr_file r_file_perms for
avc: denied { ioctl } for path="/dev/ion" dev="tmpfs" ino=15014 ioctlcmd=4900 scontext=u:r:hal_graphics_composer:s0 tcontext=u:object_r:ion_device:s0 tclass=chr_file permissive=1

allow ... graphics_device ... for
avc: denied { ioctl } for path="/dev/graphics/fb0" dev="tmpfs" ino=15121 ioctlcmd=5380 scontext=u:r:hal_graphics_composer:s0 tcontext=u:object_r:graphics_device:s0 tclass=chr_file permissive=1

allow ... ...:fd use for
avc: denied { use } for path="anon_inode:dmabuf" dev="anon_inodefs" ino=12794 scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:hal_graphics_allocator_service:s0 tclass=fd permissive=1
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=12794 scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:bootanim:s0 tclass=fd permissive=1
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=12794 scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:surfaceflinger:s0 tclass=fd permissive=1
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=12794 scontext=u:r:hal_graphics_composer:s0 tcontext=u:r:platform_app:s0:c512,c768 tclass=fd permissive=1

binder_call(surfaceflinger, ...) for
avc: denied { call } for scontext=u:r:surfaceflinger:s0 tcontext=u:r:hal_graphics_composer:s0 tclass=binder permissive=1
avc: denied { transfer } for scontext=u:r:surfaceflinger:s0 tcontext=u:r:hal_graphics_composer:s0 tclass=binder permissive=1
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=12794 ioctlcmd=3e02 scontext=u:r:surfaceflinger:s0 tcontext=u:r:hal_graphics_composer:s0 tclass=fd permissive=1
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=12794 scontext=u:r:surfaceflinger:s0 tcontext=u:r:hal_graphics_composer:s0 tclass=fd permissive=1

allow bootanim ...:fd use for
avc: denied { use } for path="anon_inode:sync_fence" dev="anon_inodefs" ino=11947 scontext=u:r:bootanim:s0 tcontext=u:r:hal_graphics_composer:s0 tclass=fd permissive=1

Bug: 32021609
Test: make bootimage
Change-Id: I036cdbebf0c619fef7559f294f1865f381b17588

private/file_contexts

@@ -226,6 +226,7 @@
 /system/bin/hw/android\.hardware\.audio@2\.0-service          u:object_r:hal_audio_exec:s0
 /system/bin/hw/android\.hardware\.boot@1\.0-service           u:object_r:hal_boot_exec:s0
 /system/bin/hw/android\.hardware\.graphics\.allocator@2\.0-service   u:object_r:hal_graphics_allocator_exec:s0
+/system/bin/hw/android\.hardware\.graphics\.composer@2\.1-service    u:object_r:hal_graphics_composer_exec:s0
 /system/bin/hw/android\.hardware\.light@2\.0-service          u:object_r:hal_light_exec:s0
 /system/bin/hw/android\.hardware\.memtrack@1\.0-service       u:object_r:hal_memtrack_exec:s0
 /system/bin/hw/android\.hardware\.nfc@1\.0-service            u:object_r:hal_nfc_exec:s0

private/hal_graphics_composer.te

+init_daemon_domain(hal_graphics_composer)

public/bootanim.te

@@ -22,6 +22,9 @@ allow bootanim surfaceflinger_service:service_manager find;
 allow bootanim ion_device:chr_file rw_file_perms;
 allow bootanim hal_graphics_allocator:fd use;
 
+# Fences
+allow bootanim hal_graphics_composer:fd use;
+
 # Read access to pseudo filesystems.
 r_dir_file(bootanim, proc)
 allow bootanim proc_meminfo:file r_file_perms;

public/hal_graphics_composer.te

+# graphics composer subsystem
+type hal_graphics_composer, domain;
+type hal_graphics_composer_exec, exec_type, file_type;
+
+# HwBinder access
+hwbinder_use(hal_graphics_composer)
+# IComposerCallback
+binder_call(hal_graphics_composer, surfaceflinger)
+
+# GPU device access
+allow hal_graphics_composer gpu_device:chr_file rw_file_perms;
+allow hal_graphics_composer ion_device:chr_file r_file_perms;
+allow hal_graphics_composer hal_graphics_allocator:fd use;
+
+# Access /dev/graphics/fb0.
+allow hal_graphics_composer graphics_device:dir search;
+allow hal_graphics_composer graphics_device:chr_file rw_file_perms;
+
+# Fences
+allow hal_graphics_composer system_server:fd use;
+allow hal_graphics_composer bootanim:fd use;
+allow hal_graphics_composer {appdomain ephemeral_app}:fd use;

public/surfaceflinger.te

@@ -7,6 +7,7 @@ typeattribute surfaceflinger mlstrustedsubject;
 # Perform HwBinder IPC.
 hwbinder_use(surfaceflinger)
 binder_call(surfaceflinger, hal_graphics_allocator)
+binder_call(surfaceflinger, hal_graphics_composer)
 
 # Perform Binder IPC.
 binder_use(surfaceflinger)