9d9c730f1c
Bug: 225745567
Test: Build
Change-Id: I49fb91c7a60fb1e871bdf3553d978bb16c476fd7
Merged-In: I49fb91c7a60fb1e871bdf3553d978bb16c476fd7
(cherry picked from commit f9a00364c8)
72 lines
2.3 KiB
Text
72 lines
2.3 KiB
Text
# lmkd low memory killer daemon
|
|
type lmkd, domain, mlstrustedsubject;
|
|
type lmkd_exec, system_file_type, exec_type, file_type;
|
|
|
|
allow lmkd self:global_capability_class_set { dac_override dac_read_search 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 and /proc/PID/timerslack_ns
|
|
## TODO: maybe scope this down?
|
|
r_dir_file(lmkd, domain)
|
|
allow lmkd domain:file write;
|
|
|
|
## Writes to /sys/module/lowmemorykiller/parameters/minfree
|
|
r_dir_file(lmkd, sysfs_lowmemorykiller)
|
|
allow lmkd sysfs_lowmemorykiller:file w_file_perms;
|
|
|
|
# setsched and send kill signals to any registered process
|
|
allow lmkd domain:process { setsched sigkill };
|
|
# TODO: delete this line b/131761776
|
|
allow lmkd kernel:process { setsched };
|
|
|
|
# Clean up old cgroups
|
|
allow lmkd cgroup:dir { remove_name rmdir };
|
|
allow lmkd cgroup_v2:dir { remove_name rmdir };
|
|
|
|
# Allow to read memcg stats
|
|
allow lmkd cgroup:file r_file_perms;
|
|
allow lmkd cgroup_v2: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;
|
|
allow lmkd proc_vmstat: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/lowmemorykiller
|
|
allow lmkd proc_lowmemorykiller:file r_file_perms;
|
|
|
|
# Read /proc/meminfo
|
|
allow lmkd proc_meminfo:file r_file_perms;
|
|
|
|
# Read /proc/pressure/cpu and /proc/pressure/io
|
|
allow lmkd proc_pressure_cpu:file r_file_perms;
|
|
allow lmkd proc_pressure_io:file r_file_perms;
|
|
|
|
# Read/Write /proc/pressure/memory
|
|
allow lmkd proc_pressure_mem:file rw_file_perms;
|
|
|
|
# Allow lmkd to connect during reinit.
|
|
allow lmkd lmkd_socket:sock_file write;
|
|
|
|
# Allow lmkd to write to statsd.
|
|
unix_socket_send(lmkd, statsdw, statsd)
|
|
|
|
### neverallow rules
|
|
|
|
# never honor LD_PRELOAD
|
|
neverallow * lmkd:process noatsecure;
|
|
neverallow lmkd self:global_capability_class_set sys_ptrace;
|