From: Kees Cook <kees@kernel.org>
To: Bill Wendling <morbo@google.com>
Cc: Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] overflow: Match arithmetic in both parts of __builtin_choose_expr
Date: Wed, 14 Oct 2026 18:06:33 -0700 [thread overview]
Message-ID: <179202639313.3469796.882953895340235726.b4-ty@kernel.org> (raw)
In-Reply-To: <20261013203146.387344-1-morbo@google.com>
On Tue, 13 Oct 2026 20:31:46 +0000, Bill Wendling wrote:
> The two parts of '__builtin_choose_expr()' had different arithmetic
> expressions. This patch corrects it so that both parts calculate:
>
> COUNT * sizeof(*MEMBER) + __must_be_array(MEMBER)
>
> In practice, '__must_be_array' is meant to assert if 'MEMBER' isn't an
> array and return '0' otherwise. However, symmetry is less prone to
> subtle errors (and far more satisfying).
>
> [...]
Applied to for-next/hardening, thanks!
[1/1] overflow: Match arithmetic in both parts of __builtin_choose_expr
https://git.kernel.org/kees/c/2f70a9b7e9c7
Take care,
--
Kees Cook
prev parent reply other threads:[~2026-10-15 1:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 20:59 [PATCH] " Bill Wendling
2026-10-13 3:30 ` Kees Cook
2026-10-13 17:17 ` Bill Wendling
2026-10-13 20:31 ` [PATCH v2] " Bill Wendling
2026-10-14 12:38 ` David Laight
2026-10-14 20:39 ` Bill Wendling
2026-10-15 10:00 ` David Laight
2026-10-15 18:04 ` Bill Wendling
2026-10-15 1:06 ` Kees Cook [this message]
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