You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.2 KiB
44 lines
1.2 KiB
# lmkd low memory killer daemon |
|
type lmkd, domain, mlstrustedsubject; |
|
type lmkd_exec, exec_type, file_type; |
|
|
|
allow lmkd self:capability { 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:capability 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_type) |
|
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:capability sys_nice; |
|
|
|
allow lmkd proc_zoneinfo:file r_file_perms; |
|
|
|
# Allow lmkd to self-exec in order to impose rlimits on itself |
|
allow lmkd lmkd_exec:file x_file_perms; |
|
|
|
### neverallow rules |
|
|
|
# never honor LD_PRELOAD |
|
neverallow * lmkd:process noatsecure;
|
|
|