atrace.te: allow notifying cameraserver of a change in sysprops
This allows the atrace cmd to notify cameraserver (the host of
media.camera service) that the set of tracing-related system properties
have changed. This allows the cameraserver to notice that it might need
to enable its trace events.
The atrace cmd has the necessary permission when running as shell, but
not when it is running as the "atrace" domain (notably when exec'd by
perfetto's traced_probes).
We're adding cameraserver to the whitelist as it contains important
events for investigating the camera stack.
Example denial:
05-14 22:29:43.501 8648 8648 W atrace : type=1400 audit(0.0:389): avc: denied { call } for scontext=u:r:atrace:s0 tcontext=u:r:cameraserver:s0 tclass=binder permissive=0
Tested: flashed blueline-userdebug, captured a perfetto trace with "camera" atrace category, confirmed that userspace atrace events are included in the trace.
Bug: 130543265
Change-Id: Ifd3fd5fd3a737c7618960343b9f89d3bf7141c94
1 file changed