Allow domain access r_file_perms for passwd and group files
In b/73062966, we add new AID ranges for each partition that doesn't
yet have them (system, system_ext, odm, product). We also add group
and passwd files to these partitions to be able to map these AIDs into
human readable user and group names, and vice versa.
All processes should be able to read all users and groups. We divide
the ranges into non-overlapping regions for each partition and we
namespace the names with the partition name as a prefix.
Allow domain r_file_perms to
/(system|product|system_ext)/etc/(group|passwd).
Vendor and odm passwd and group files already have this access, since
/(vendor|odm)/etc/* is already domain readable.
Example contents:
blueline:/ $ cat /system/etc/passwd
system_tom::6050:6050::/:/bin/sh
blueline:/ $ cat /product/etc/passwd
product_tom::7013:7013::/:/bin/sh
Bug: 73062966
Test: tree-hugger selinux denial during boot test
Change-Id: Ib4dc31778e95e952174e1365497feaf93dca7156
diff --git a/private/file_contexts b/private/file_contexts
index 60b569d..4e16390 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -304,7 +304,9 @@
/system/bin/hw/android\.system\.suspend@1\.0-service u:object_r:system_suspend_exec:s0
/system/etc/cgroups\.json u:object_r:cgroup_desc_file:s0
/system/etc/event-log-tags u:object_r:system_event_log_tags_file:s0
+/system/etc/group u:object_r:system_group_file:s0
/system/etc/ld\.config.* u:object_r:system_linker_config_file:s0
+/system/etc/passwd u:object_r:system_passwd_file:s0
/system/etc/seccomp_policy(/.*)? u:object_r:system_seccomp_policy_file:s0
/system/etc/security/cacerts(/.*)? u:object_r:system_security_cacerts_file:s0
/system/etc/selinux/mapping/[0-9]+\.[0-9]+\.cil u:object_r:sepolicy_file:s0
@@ -398,6 +400,8 @@
# Product files
#
/(product|system/product)(/.*)? u:object_r:system_file:s0
+/(product|system/product)/etc/group u:object_r:system_group_file:s0
+/(product|system/product)/etc/passwd u:object_r:system_passwd_file:s0
/(product|system/product)/overlay(/.*)? u:object_r:vendor_overlay_file:s0
/(product|system/product)/etc/selinux/product_file_contexts u:object_r:file_contexts_file:s0
@@ -411,6 +415,8 @@
# SystemExt files
#
/(system_ext|system/system_ext)(/.*)? u:object_r:system_file:s0
+/(system_ext|system/system_ext)/etc/group u:object_r:system_group_file:s0
+/(system_ext|system/system_ext)/etc/passwd u:object_r:system_passwd_file:s0
/(system_ext|system/system_ext)/overlay(/.*)? u:object_r:vendor_overlay_file:s0
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