commit 3b1141d44f448ea9a528ff8af8f128686c35039d
author Edwin Wong <edwinwong@google.com> Tue Feb 02 14:36:26 2021 -0800
committer Edwin Wong <edwinwong@google.com> Fri Feb 26 21:17:31 2021 +0000
tree 48ec69b663f32b5c37f8829a6ae0831f39e40773
parent 6542f433ea49885b6652ab2598a8567d87a3a42e

Fix UAF in clearkey service's MemoryFileSystem

Fixes the potential issue of a UAF(Used After Free)
of a MemoryFileSystem handle in clearkey hidl service.
The issue can occur in a race codition where the handle
can be freed twice.

Test: sts-tradefed
  sts-tradefed run sts-engbuild-no-spl-lock -m StsHostTestCases --test android.security.sts.Bug_176237595#testPocBug_176237595

Test: push to device with target_hwasan-userdebug build
  adb shell /data/local/tmp/Bug-176237595_sts64

Bug: 176237595
Change-Id: I024f6716f66b21849121bef8780170014f4bf2b9