linux-hardening - Re: [PATCH] net/mlx5: Annotate struct mlx5_flow_handle with __counted

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Message-ID: <ZShNpk6mPNDYiFSj@x130>
Date: Thu, 12 Oct 2023 12:48:54 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: Kees Cook <keescook@...omium.org>
Cc: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.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,
	linux-hardening@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] net/mlx5: Annotate struct mlx5_flow_handle with
 __counted_by

On 03 Oct 16:17, Kees Cook 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).
>
>As found with Coccinelle[1], add __counted_by for struct mlx5_flow_handle.
>
>Cc: Saeed Mahameed <saeedm@...dia.com>
>Cc: Leon Romanovsky <leon@...nel.org>
>Cc: "David S. Miller" <davem@...emloft.net>
>Cc: Eric Dumazet <edumazet@...gle.com>
>Cc: Jakub Kicinski <kuba@...nel.org>
>Cc: Paolo Abeni <pabeni@...hat.com>
>Cc: netdev@...r.kernel.org
>Cc: linux-rdma@...r.kernel.org
>Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
>Signed-off-by: Kees Cook <keescook@...omium.org>

applied to net-next-mlx5.