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init.rc: set up a tracing instance for BootReceiver.java

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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
Bug: 181778620
Test: manual runs with KFENCE enabled
Signed-off-by: Alexander Potapenko <glider@google.com>
Change-Id: Ibc5cd3b60fb99030cc55db6b490d6d4bbbca3963
This commit is contained in:
Alexander Potapenko 2021-03-02 16:50:16 +01:00
parent 3aab337293
commit 439608bfb0
1 changed files with 9 additions and 0 deletions
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9
rootdir/init.rc
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@ -620,6 +620,15 @@ on late-fs
# 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