tree 539d6b3d910a73c5e3ac7e02826b95df5ade17e8
parent 76923a32ab6ea25115b65ff86ade7235ba7b3a33
author Arthur Ishiguro <arthuri@google.com> 1600805115 -0700
committer Anis Assi <anisassi@google.com> 1605210364 -0800

Prevent mEventCache UAF in SensorEventConnection

Since there is no check to see if SensorEventConnection has been
destroyed, the mEventCache pointer can still be used even after it
was freed.

Bug: 168211968
Test: Run test code that attempts to enable a sensor after destroying
the SensorEventConnection, and verify no system_server crash occurs.

Change-Id: Ia9275b7cc574df371cdb2e1b80c6699df193b580
Merged-In: Ia9275b7cc574df371cdb2e1b80c6699df193b580
(cherry picked from commit 3b27b3b3bb36274171a9abb31f3e3f6b53036cf0)