Edwin Wong 9191787d0e Fix potential decrypt destPtr overflow.
There is a potential integer overflow to bypass the
destination base size check in decrypt. The destPtr
can then point to the outside of the destination buffer.

Test: sts-tradefed
  sts-tradefed run sts-engbuild-no-spl-lock -m StsHostTestCases --test android.security.sts.Bug_176444622#testPocBug_176444622

Test: push to device with target_hwasan-userdebug build
  adb shell /data/local/tmp/Bug-17644462264

Bug: 176444622
Bug: 176496353
Change-Id: I63043d10796f82ad805038ba1fad5bd7d5c89961
Merged-In: I63043d10796f82ad805038ba1fad5bd7d5c89961
2021-02-25 17:55:20 +00:00
2020-07-08 17:56:49 +00:00
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