1 files changed, 53 insertions, 0 deletions
diff --git a/prebuilts/api/32.0/private/llkd.te b/prebuilts/api/32.0/private/llkd.te
new file mode 100644
index 000000000..f218dec7c
--- /dev/null
+++ b/prebuilts/api/32.0/private/llkd.te
@@ -0,0 +1,53 @@
+# llkd Live LocK Daemon
+typeattribute llkd coredomain;
+
+init_daemon_domain(llkd)
+
+get_prop(llkd, llkd_prop)
+
+allow llkd self:global_capability_class_set kill;
+userdebug_or_eng(`
+  allow llkd self:global_capability_class_set { sys_ptrace sys_admin };
+  allow llkd self:global_capability_class_set { dac_override dac_read_search };
+')
+
+# llkd optionally locks itself in memory, to prevent it from being
+# swapped out and unable to discover a kernel in live-lock state.
+allow llkd self:global_capability_class_set ipc_lock;
+
+# Send kill signals to _anyone_ suffering from Live Lock
+allow llkd domain:process sigkill;
+
+# read stack to check for Live Lock
+userdebug_or_eng(`
+  allow llkd {
+    domain
+    -apexd
+    -kernel
+    -keystore
+    -init
+    -llkd
+    -ueventd
+    -vendor_init
+  }:process ptrace;
+')
+
+# live lock watchdog process allowed to look through /proc/
+allow llkd domain:dir r_dir_perms;
+allow llkd domain:file r_file_perms;
+allow llkd domain:lnk_file read;
+# Set /proc/sys/kernel/hung_task_*
+allow llkd proc_hung_task:file rw_file_perms;
+
+# live lock watchdog process allowed to dump process trace and
+# reboot because orderly shutdown may not be possible.
+allow llkd proc_sysrq:file w_file_perms;
+allow llkd kmsg_device:chr_file w_file_perms;
+
+### neverallow rules
+
+neverallow { domain -init } llkd:process { dyntransition transition };
+neverallow { domain userdebug_or_eng(`-crash_dump') } llkd:process ptrace;
+
+# never honor LD_PRELOAD
+neverallow * llkd:process noatsecure;