conf: fix length calculation on rename operation

This actually wasn't a problem before, because Windows ignores the
length field when not renaming to an alternative data stream:

    FileName = lpFileInformation->FileName;
    if ( lpFileInformation->FileNameLength >= 2 && *FileName == ':' )
    {
      FileNameLength = lpFileInformation->FileNameLength;
      Src.MaximumLength = FileNameLength;
      Src.Length = FileNameLength;
      Src.Buffer = lpFileInformation->FileName;
    }
    else
    {
      status = RtlDosPathNameToNtPathName_U_WithStatus(FileName, &Src, 0, 0);
      if ( status < 0 )
      {
        v15 = status;
LABEL_19:
        BaseSetLastNTError(v15);
        return 0;
      }
      FileNameLength = Src.Length;
    }

Nonetheless, it's clear from this code (>=2) and the documentation that
the length field is intended to be in bytes, not chars. So fix that.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

0 files changed, 0 insertions, 0 deletions