Prevent out of bounds accesses in lppTransposer() and lppTransposerHBE()

Bug: 112160868
Test: see poc in bug
Change-Id: I6a2161865d9cb9b51dc37c09d6e3a4a8e5d11f86
(cherry picked from commit 4dad829df00932b89858b9833cf5dcded8d97c37)
2 files changed