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Commit 7e357eb7 authored by chenyc5's avatar chenyc5
Browse files

Make bpf_attach_tracepoint() available as soon as possible 

The "sys.init.perf_lsm_hooks" is set on TestPerEventSelinux and it
is before early-init, but it need trigger by queue_property_triggers
and it is after late-init (zygote start on late-init).
The property is ready on load_bpf_programs, make sure
bpf_attach_tracepoint() is available on zygote start.

Bug: 257102190
Test: cat /sys/fs/bpf/map_time_in_state_uid_time_in_state_map
Change-Id: I5aa102df54b82e1584882800e93efd06ccf61c16
parent 3b88013a

rootdir/init.rc

+1 −1
Original line number Diff line number Diff line
@@ -1223,7 +1223,7 @@ on property:net.tcp_def_init_rwnd=* 
# controlling access. On older kernels, the paranoid value is the only means of

# controlling access. It is normally 3 (allow only root), but the shell user

# can lower it to 1 (allowing thread-scoped pofiling) via security.perf_harden.

on property:sys.init.perf_lsm_hooks=1

on load_bpf_programs && property:sys.init.perf_lsm_hooks=1

    write /proc/sys/kernel/perf_event_paranoid -1

on property:security.perf_harden=0 && property:sys.init.perf_lsm_hooks=""

    write /proc/sys/kernel/perf_event_paranoid 1