linux-hardening - Re: [PATCH] bcachefs: Use struct

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Message-ID: <20231006173247.zn4l6mwhup4bjkrf@moria.home.lan>
Date: Fri, 6 Oct 2023 13:32:47 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: Brian Foster <bfoster@...hat.com>, Kees Cook <keescook@...omium.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, linux-bcachefs@...r.kernel.org,
	linux-hardening@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] bcachefs: Use struct_size()

On Sun, Oct 01, 2023 at 09:13:54AM +0200, Christophe JAILLET wrote:
> Use struct_size() instead of hand writing it.
> This is less verbose and more robust.
> 
> While at it, prepare for the coming implementation by GCC and Clang of the
> __counted_by attribute. Flexible array members annotated with __counted_by
> can have their accesses bounds-checked at run-time checking via
> CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for
> strcpy/memcpy-family functions).
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Thanks! Applied.