Re: [PATCH 0/3] Allow default HARDENED_USERCOPY to be set at compile time

[Kees Cook]

On Fri, Jan 17, 2025 at 01:03:34PM +0000, Mel Gorman wrote:
> Some hardening options like HARDENED_USERCOPY can be set at boot time
> and have negligible cost when disabled. The default for options like
> init_on_alloc= can be set at compile time but hardened usercopy is
> enabled by default if built in. This incurs overhead when a kernel
> wishes to provide optional hardening but the user does not necessarily
> care.

Yeah! I like this. It's been somewhere on my TODO list for a while, so
thank you for doing it!

Nits/ideas in the patch replies...

-- 
Kees Cook