am ef6a1a21: am 892e06d1: am 86fb9185: am 75a8776e: am 3cff4324: am 520434cd: am 24acf11d: am 4a131250: am 030d8d0a: Fix several ineffective integer overflow checks

* commit 'ef6a1a212ff0e9f52db7dcc55117a0df9efa15b3':
  Fix several ineffective integer overflow checks