75806ef3c5
Ideally, public should only contain APIs (types / attributes) for
vendor. The other statements like allow/neverallow/typeattributes are
regarded as implementation detail for platform and should be in private.
Bug: 232023812
Test: m selinux_policy
Test: diff <(git diff --staged | grep "^-" | cut -b2- | sort) \
<(git diff --staged | grep "^+" | cut -b2- | sort)
Test: remove comments on plat_sepolicy.cil, replace base_typeattr_*
to base_typeattr and then compare old and new plat_sepolicy.cil
Change-Id: I5e7d2da4465ab0216de6bacdf03077d37f6ffe12
95 lines
3 KiB
Text
95 lines
3 KiB
Text
typeattribute lmkd coredomain;
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typeattribute lmkd bpfdomain;
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init_daemon_domain(lmkd)
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# Set sys.lmk.* properties.
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set_prop(lmkd, system_lmk_prop)
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# Set lmkd.* properties.
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set_prop(lmkd, lmkd_prop)
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# Get persist.device_config.lmk_native.* properties.
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get_prop(lmkd, device_config_lmkd_native_prop)
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# Needed for reading tracepoint ids in order to attach bpf programs.
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allow lmkd debugfs_tracing:file r_file_perms;
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allow lmkd self:perf_event { cpu kernel open write };
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allow lmkd fs_bpf:file read;
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allow lmkd bpfloader:bpf { map_read map_write prog_run };
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# Needed for polling directly from the bpf ring buffer's fd
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allow lmkd fs_bpf_lmkd_memevents_rb:file { read write };
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allow lmkd fs_bpf_lmkd_memevents_prog:file read;
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allow lmkd self:global_capability_class_set { dac_override dac_read_search sys_resource kill };
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# lmkd locks itself in memory, to prevent it from being
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# swapped out and unable to kill other memory hogs.
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# system/core commit b28ff9131363f7b4a698990da5748b2a88c3ed35
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# b/16236289
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allow lmkd self:global_capability_class_set ipc_lock;
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## Open and write to /proc/PID/oom_score_adj and /proc/PID/timerslack_ns
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## TODO: maybe scope this down?
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r_dir_file(lmkd, domain)
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allow lmkd domain:file write;
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## Writes to /sys/module/lowmemorykiller/parameters/minfree
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r_dir_file(lmkd, sysfs_lowmemorykiller)
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allow lmkd sysfs_lowmemorykiller:file w_file_perms;
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# setsched and send kill signals to any registered process
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allow lmkd domain:process { setsched sigkill };
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# TODO: delete this line b/131761776
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allow lmkd kernel:process { setsched };
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# Clean up old cgroups
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allow lmkd cgroup:dir { remove_name rmdir };
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allow lmkd cgroup_v2:dir { remove_name rmdir };
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# Allow to read memcg stats
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allow lmkd cgroup:file r_file_perms;
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allow lmkd cgroup_v2:file r_file_perms;
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# Set self to SCHED_FIFO
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allow lmkd self:global_capability_class_set sys_nice;
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allow lmkd proc_zoneinfo:file r_file_perms;
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allow lmkd proc_vmstat:file r_file_perms;
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# live lock watchdog process allowed to look through /proc/
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allow lmkd domain:dir { search open read };
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allow lmkd domain:file { open read };
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# live lock watchdog process allowed to dump process trace and
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# reboot because orderly shutdown may not be possible.
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allow lmkd proc_sysrq:file rw_file_perms;
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# Read /proc/lowmemorykiller
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allow lmkd proc_lowmemorykiller:file r_file_perms;
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# Read /proc/meminfo
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allow lmkd proc_meminfo:file r_file_perms;
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# Read /proc/pressure/cpu and /proc/pressure/io
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allow lmkd proc_pressure_cpu:file r_file_perms;
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allow lmkd proc_pressure_io:file r_file_perms;
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# Read/Write /proc/pressure/memory
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allow lmkd proc_pressure_mem:file rw_file_perms;
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# Allow lmkd to connect during reinit.
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allow lmkd lmkd_socket:sock_file write;
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# Allow lmkd to write to statsd.
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unix_socket_send(lmkd, statsdw, statsd)
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### neverallow rules
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# never honor LD_PRELOAD
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neverallow * lmkd:process noatsecure;
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neverallow lmkd self:global_capability_class_set sys_ptrace;
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neverallow { domain -init -lmkd -vendor_init } lmkd_prop:property_service set;
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neverallow lmkd self:perf_event ~{ cpu kernel open write };
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