tree bf41780c72f3a182156dd4f94c5d1fd529064906
parent d1a977b77169f4997c54657136f2698395014eca
author Edwin Wong <edwinwong@google.com> 1611721765 -0800
committer Edwin Wong <edwinwong@google.com> 1612370467 -0800

Fix potential decrypt src pointer overflow.

There is a potential integer overflow to bypass the
source base size check in decrypt. The source pointer
can then point to the outside of the source buffer,
which could potentially leak arbitrary memory content
to destination pointer.

Test: sts-tradefed
  sts-tradefed run sts-engbuild-no-spl-lock -m StsHostTestCases --test android.security.sts.Bug_176496160#testPocBug_176496160

Test: push to device with target_hwasan-userdebug build
  adb shell /data/local/tmp/Bug-17649616064

Bug: 176496160
Bug: 176444786
Change-Id: I811a6f60948bde2a72906c2c6172fd7bc5feb6d9