[all-commits] [llvm/llvm-project] 8fac07: scudo: Exclude previous tag when retagging freed m...

[pcc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8fac07a12adcd968cd4b6a1c1067e4596ad40b1a
      https://github.com/llvm/llvm-project/commit/8fac07a12adcd968cd4b6a1c1067e4596ad40b1a
  Author: Peter Collingbourne <peter at pcc.me.uk>
  Date:   2020-05-01 (Fri, 01 May 2020)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/combined.h
    M compiler-rt/lib/scudo/standalone/memtag.h

  Log Message:
  -----------
  scudo: Exclude previous tag when retagging freed memory.

This means that immediate use after free will be detected 100% of
the time.

Differential Revision: https://reviews.llvm.org/D79216