linux-hardening - Re: [linux-next:master] BUILD REGRESSION df964ce9ef9fea10cf131bf6bad8658fde7956f6

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Message-ID: <202310012150.72AAB06FAD@keescook>
Date: Sun, 1 Oct 2023 21:52:22 -0700
From: Kees Cook <keescook@...omium.org>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Brian Foster <bfoster@...hat.com>,
	kernel test robot <lkp@...el.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-fsdevel@...r.kernel.org, linux-bcachefs@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [linux-next:master] BUILD REGRESSION
 df964ce9ef9fea10cf131bf6bad8658fde7956f6

On Sun, Oct 01, 2023 at 11:22:39PM -0400, Kent Overstreet wrote:
> I'm not leaping at the chance to reorganize my fundamental data
> structures for this.

Yeah, understood. Thanks for taking a look at it!

> Can we get such an escape hatch?

Sure, please use unsafe_memcpy(), and include a comment on how the sizing
has been bounds checked, etc.

-- 
Kees Cook