Re: [PATCH v4] lib/bootconfig: guard xbc_node_compose_key_after() buffer size

[Steven Rostedt]

On Wed, 18 Mar 2026 09:02:43 +0900
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote:

> Yes, that is checked in vsnprintf(), not its caller.
> I think linux kernel should ensure the the return value is smaller
> than INT_MAX, and return -EOVERFLOW if not.

Well, there's very few places that could have a buffer size of > 2G.

What's the max bootconfig limit? Could you create a bootconfig that is
greater than 2G?

If not, then yeah, we shouldn't really care about overflows (and that
includes not worrying about typecasting the size variable to int).

-- Steve