76384b3ee0
Allow lmkd read access to /proc/meminfo for retrieving information on memory state. Change-Id: I7cf685813a5a49893c8f9a6ac4b5f6619f3c18aa Signed-off-by: Suren Baghdasaryan <surenb@google.com>
52 lines
1.5 KiB
Text
52 lines
1.5 KiB
Text
# lmkd low memory killer daemon
|
|
type lmkd, domain, mlstrustedsubject;
|
|
type lmkd_exec, exec_type, file_type;
|
|
|
|
allow lmkd self:global_capability_class_set { dac_override sys_resource kill };
|
|
|
|
# lmkd locks itself in memory, to prevent it from being
|
|
# swapped out and unable to kill other memory hogs.
|
|
# system/core commit b28ff9131363f7b4a698990da5748b2a88c3ed35
|
|
# b/16236289
|
|
allow lmkd self:global_capability_class_set ipc_lock;
|
|
|
|
## Open and write to /proc/PID/oom_score_adj
|
|
## TODO: maybe scope this down?
|
|
r_dir_file(lmkd, appdomain)
|
|
allow lmkd appdomain:file write;
|
|
r_dir_file(lmkd, system_server)
|
|
allow lmkd system_server:file write;
|
|
|
|
## Writes to /sys/module/lowmemorykiller/parameters/minfree
|
|
r_dir_file(lmkd, sysfs_lowmemorykiller)
|
|
allow lmkd sysfs_lowmemorykiller:file w_file_perms;
|
|
|
|
# Send kill signals
|
|
allow lmkd appdomain:process sigkill;
|
|
|
|
# Clean up old cgroups
|
|
allow lmkd cgroup:dir { remove_name rmdir };
|
|
|
|
# Allow to read memcg stats
|
|
allow lmkd cgroup:file r_file_perms;
|
|
|
|
# Set self to SCHED_FIFO
|
|
allow lmkd self:global_capability_class_set sys_nice;
|
|
|
|
allow lmkd proc_zoneinfo:file r_file_perms;
|
|
|
|
# live lock watchdog process allowed to look through /proc/
|
|
allow lmkd domain:dir { search open read };
|
|
allow lmkd domain:file { open read };
|
|
|
|
# live lock watchdog process allowed to dump process trace and
|
|
# reboot because orderly shutdown may not be possible.
|
|
allow lmkd proc_sysrq:file rw_file_perms;
|
|
|
|
# Read /proc/meminfo
|
|
allow lmkd proc_meminfo:file r_file_perms;
|
|
|
|
### neverallow rules
|
|
|
|
# never honor LD_PRELOAD
|
|
neverallow * lmkd:process noatsecure;
|