Re: [PATCH] fscrypt: Replace 1-element array with flexible array

[Eric Biggers]

On Mon, May 22, 2023 at 02:39:28PM -0700, Kees Cook wrote:
> In the future, we can add annotations for the flexible array member
> "encrypted_path" to have a size determined by the "len" member.

That seems unlikely, as 'struct fscrypt_symlink_data' is an on-disk data
structure.  The "len" field does not necessarily use CPU endianness, and before
being validated it might be greater than the size of the allocated space.

I agree that it should use a flex array (and thanks for catching this one that I
had forgotten about...), but the above explanation seems wrong.

- Eric