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Add SELinux policy for mediacodec_google

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mediacodec_google represents google av1 decoder
hal service.

Bug: 205657135

Signed-off-by: Ruofei Ma <ruofeim@google.com>
Change-Id: Ied61107d1991a22b24170b055bf3613165cbe050
This commit is contained in:
Ruofei Ma 2021-11-12 22:47:56 +00:00 • committed by TreeHugger Robot
parent bc651b87ce
commit fded60a79e
2 changed files with 25 additions and 8 deletions
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7
tracking_denials/mediacodec_google.te
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@ -1,7 +0,0 @@
# b/205657135
dontaudit mediacodec_google dmabuf_system_heap_device:chr_file { getattr };
dontaudit mediacodec_google vndbinder_device:chr_file { ioctl };
dontaudit mediacodec_google vndbinder_device:chr_file { map };
dontaudit mediacodec_google vndbinder_device:chr_file { open };
dontaudit mediacodec_google vndbinder_device:chr_file { read };
dontaudit mediacodec_google vndbinder_device:chr_file { write };

26
whitechapel_pro/mediacodec_google.te
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@ -1,5 +1,29 @@
type mediacodec_google, domain;
type mediacodec_google_exec, vendor_file_type, exec_type, file_type;
type mediacodec_google_exec, exec_type, vendor_file_type, file_type;
init_daemon_domain(mediacodec_google)
# can route /dev/binder traffic to /dev/vndbinder
vndbinder_use(mediacodec_google)
hal_server_domain(mediacodec_google, hal_codec2)
# mediacodec_google may use an input surface from a different Codec2 service
hal_client_domain(mediacodec_google, hal_codec2)
hal_client_domain(mediacodec_google, hal_graphics_allocator)
allow mediacodec_google dmabuf_system_heap_device:chr_file r_file_perms;
allow mediacodec_google video_device:chr_file rw_file_perms;
crash_dump_fallback(mediacodec_google)
# mediacodec_google should never execute any executable without a domain transition
neverallow mediacodec_google { file_type fs_type }:file execute_no_trans;
# Media processing code is inherently risky and thus should have limited
# permissions and be isolated from the rest of the system and network.
# Lengthier explanation here:
# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
neverallow mediacodec_google domain:{ udp_socket rawip_socket } *;
neverallow mediacodec_google { domain userdebug_or_eng(`-su') }:tcp_socket *;