[all-commits] [llvm/llvm-project] 8784dc: [msan] Detect dereferencing zero-alloc as use-of-u...

[Thurston Dang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8784dcef3485a3862e5cacc9e18c646d0225483b
      https://github.com/llvm/llvm-project/commit/8784dcef3485a3862e5cacc9e18c646d0225483b
  Author: Thurston Dang <thurston at google.com>
  Date:   2025-08-29 (Fri, 29 Aug 2025)

  Changed paths:
    M compiler-rt/lib/msan/msan_allocator.cpp
    M compiler-rt/test/msan/zero_alloc.cpp

  Log Message:
  -----------
  [msan] Detect dereferencing zero-alloc as use-of-uninitialized-value (#155944)

When a zero-byte allocation is requested, MSan actually allocates 1-byte
for compatibility. This change poisons that byte, to detect
dereferences.

Also updates the test from #155934



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications