linux-hardening - Re: [PATCH] sctp: annotate struct sctp_assoc_ids with __counted

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Message-ID: <202405011306.0B9D906F1@keescook>
Date: Wed, 1 May 2024 13:06:10 -0700
From: Kees Cook <keescook@...omium.org>
To: Erick Archer <erick.archer@...look.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
	Xin Long <lucien.xin@...il.com>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, linux-sctp@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: Re: [PATCH] sctp: annotate struct sctp_assoc_ids with __counted_by()

On Wed, May 01, 2024 at 07:01:22PM +0200, Erick Archer wrote:
> 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 via
> CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE
> (for strcpy/memcpy-family functions).
> 
> Suggested-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: Erick Archer <erick.archer@...look.com>

Thanks!

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook