[all-commits] [llvm/llvm-project] 023f18: [hwasan] do not check if freed pointer belonged to...

[Florian Mayer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 023f18bbaf67ee7255309fac102ec6e2dc876961
      https://github.com/llvm/llvm-project/commit/023f18bbaf67ee7255309fac102ec6e2dc876961
  Author: Florian Mayer <fmayer at google.com>
  Date:   2021-08-25 (Wed, 25 Aug 2021)

  Changed paths:
    M compiler-rt/lib/hwasan/hwasan_allocator.cpp
    M compiler-rt/lib/hwasan/hwasan_linux.cpp
    M compiler-rt/test/hwasan/TestCases/wild-free-realloc.c
    M compiler-rt/test/hwasan/TestCases/wild-free.c

  Log Message:
  -----------
  [hwasan] do not check if freed pointer belonged to allocator.

In that case it is very likely that there will be a tag mismatch anyway.

We handle the case that the pointer belongs to neither of the allocators
by getting a nullptr from allocator.GetBlockBegin.

Reviewed By: hctim, eugenis

Differential Revision: https://reviews.llvm.org/D108383