[all-commits] [llvm/llvm-project] 9a4271: [sanitizer] Always initialize the regex in the reg...

[Tavian Barnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a42715ae887e496df9122b29e86a6d8ebe5d53f
      https://github.com/llvm/llvm-project/commit/9a42715ae887e496df9122b29e86a6d8ebe5d53f
  Author: Tavian Barnes <tavianator at tavianator.com>
  Date:   2022-03-15 (Tue, 15 Mar 2022)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
    M compiler-rt/test/sanitizer_common/TestCases/Posix/regex.cpp

  Log Message:
  -----------
  [sanitizer] Always initialize the regex in the regcomp() interceptor

When regcomp() fails, the same regex_t* should be passed to regerror()
for potentially better error messages.  But doing that with msan would
report a use-of-uninitialized-value.

Fixes https://github.com/google/sanitizers/issues/1496

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D120591