blob: 9c96dfbf1ccc11a02799a7199b3904bf57c3dfc7 [file] [log] [blame]
# 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 rw_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;