[all-commits] [llvm/llvm-project] d568e5: [MSAN] Fix wordexp interception when WRDE_DOOFFS i...

[Justin Cady via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d568e5325c744dadf08729aee0819a8954a955f5
      https://github.com/llvm/llvm-project/commit/d568e5325c744dadf08729aee0819a8954a955f5
  Author: Justin Cady <desk at justincady.com>
  Date:   2021-08-24 (Tue, 24 Aug 2021)

  Changed paths:
    M compiler-rt/lib/msan/tests/msan_test.cpp
    M compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h

  Log Message:
  -----------
  [MSAN] Fix wordexp interception when WRDE_DOOFFS is used

Handle the case of wordexp being invoked with WRDE_DOOFFS and
we.we_offs set to a positive value, which will result in NULL
entries prepended to the result. With this change the entire
result, containing both NULL and actual entries, is unpoisoned.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D108646