init.rc: set up a tracing instance for BootReceiver.java
This instance will be used to monitor the error_report_end tracing
events sent by kernel tools in the case of a memory corruption.
Bug: 172316664
Test: manual runs with KFENCE enabled
Signed-off-by: Alexander Potapenko <glider@google.com>
Change-Id: Ic1c49a695ff7df4147a7351051db7b6707c86e0a
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 04e954e..0e1e98b 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -620,6 +620,15 @@
# Load trusted keys from dm-verity protected partitions
exec -- /system/bin/fsverity_init --load-verified-keys
+ # Set up a tracing instance for system_server to monitor error_report_end events.
+ # These are sent by kernel tools like KASAN and KFENCE when a memory corruption
+ # is detected.
+ mkdir /sys/kernel/tracing/instances/bootreceiver 0700 system system
+ restorecon_recursive /sys/kernel/tracing/instances/bootreceiver
+ write /sys/kernel/tracing/instances/bootreceiver/buffer_size_kb 1
+ write /sys/kernel/tracing/instances/bootreceiver/trace_options disable_on_free
+ write /sys/kernel/tracing/instances/bootreceiver/events/error_report/error_report_end/enable 1
+
on post-fs-data
mark_post_data