[PATCH] key: Convert big_key payload.data to struct

[David Howells]

Kees Cook <keescook at chromium.org> wrote:

> There is a lot of needless casting happening in the big_key data payload.
> This is harder to trivially verify by static analysis and specifically
> the randstruct GCC plugin (which was unhappy about casting a struct
> path across two entries of a void * array). This converts the payload to
> the actually used structures (one pointer, one embedded struct, and one
> size_t).

I'd really rather not do this as this moves the definition of an individual
key type into the general structure (I know I've done this for the keyring
type, but that's a special part of the keyring code).  That's the start of the
slippery slope into moving all of them in there.

I'd rather you defined, say:

	struct big_key_payload {
		u8		*key_data;
		struct path	key_path;
		size_t		key_len;
	};

in big_key.c and cast &key->payload to it.

David
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