Minimize public policy
Ideally, public should only contain APIs (types / attributes) for
vendor. The other statements like allow/neverallow/typeattributes are
regarded as implementation detail for platform and should be in private.
Bug: 232023812
Test: m selinux_policy
Test: diff <(git diff --staged | grep "^-" | cut -b2- | sort) \
<(git diff --staged | grep "^+" | cut -b2- | sort)
Test: remove comments on plat_sepolicy.cil, replace base_typeattr_*
to base_typeattr and then compare old and new plat_sepolicy.cil
Change-Id: I5e7d2da4465ab0216de6bacdf03077d37f6ffe12
diff --git a/private/runas.te b/private/runas.te
index ef31aac..1d9aed0 100644
--- a/private/runas.te
+++ b/private/runas.te
@@ -2,3 +2,44 @@
# ndk-gdb invokes adb shell run-as.
domain_auto_trans(shell, runas_exec, runas)
+
+allow runas adbd:fd use;
+allow runas adbd:process sigchld;
+allow runas adbd:unix_stream_socket { read write };
+allow runas shell:fd use;
+allow runas shell:fifo_file { read write };
+allow runas shell:unix_stream_socket { read write };
+allow runas devpts:chr_file { read write ioctl };
+allow runas shell_data_file:file { read write };
+
+# run-as reads package information.
+allow runas system_data_file:file r_file_perms;
+allow runas system_data_file:lnk_file getattr;
+allow runas packages_list_file:file r_file_perms;
+
+# The app's data dir may be accessed through a symlink.
+allow runas system_data_file:lnk_file read;
+
+# run-as checks and changes to the app data dir.
+dontaudit runas self:global_capability_class_set { dac_override dac_read_search };
+allow runas app_data_file:dir { getattr search };
+
+# run-as switches to the app UID/GID.
+allow runas self:global_capability_class_set { setuid setgid };
+
+# run-as switches to the app security context.
+selinux_check_context(runas) # validate context
+allow runas self:process setcurrent;
+allow runas non_system_app_set:process dyntransition; # setcon
+
+# runas/libselinux needs access to seapp_contexts_file to
+# determine which domain to transition to.
+allow runas seapp_contexts_file:file r_file_perms;
+
+###
+### neverallow rules
+###
+
+# run-as cannot have capabilities other than CAP_SETUID and CAP_SETGID
+neverallow runas self:global_capability_class_set ~{ setuid setgid };
+neverallow runas self:global_capability2_class_set *;