[all-commits] [llvm/llvm-project] 1287f5: [llvm-dwarfdump-fuzzer] fix out of bounds potentia...

[DavidKorczynski via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1287f5aaf7b0f7630ff7910850e3154179654e71
      https://github.com/llvm/llvm-project/commit/1287f5aaf7b0f7630ff7910850e3154179654e71
  Author: DavidKorczynski <david at adalogics.com>
  Date:   2023-12-28 (Thu, 28 Dec 2023)

  Changed paths:
    M llvm/tools/llvm-dwarfdump/fuzzer/llvm-dwarfdump-fuzzer.cpp

  Log Message:
  -----------
  [llvm-dwarfdump-fuzzer] fix out of bounds potential (#76408)

The fuzzer relies on MemoryBuffer to hold fuzz data, and MemoryBuffer
guarantees that "In addition to basic access to the characters in the
file, this interface guarantees you can read one character past the end
of the file, and that this character will read as '\0'."
[Ref](https://llvm.org/doxygen/classllvm_1_1MemoryBuffer.html#details).
The current fuzzing set up does not support this, which causes potential
false positives. This PR fixes it.

Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65114

Signed-off-by: David Korczynski <david at adalogics.com>