linux-kernel - Re: [GIT PULL] hardening updates for v6.5-rc1

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Message-ID: <ZJ0xhCenJr+Dzs/8@infradead.org>
Date:   Thu, 29 Jun 2023 00:23:48 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Alexander Lobakin <aleksander.lobakin@...el.com>,
        Alexander Potapenko <glider@...gle.com>,
        Alex Deucher <alexander.deucher@....com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Arne Welzel <arne.welzel@...elight.com>,
        Azeem Shaikh <azeemshaikh38@...il.com>,
        Bill Wendling <morbo@...gle.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Fangrui Song <maskray@...gle.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>, Jan Kara <jack@...e.cz>,
        Joe Perches <joe@...ches.com>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        John Stultz <jstultz@...gle.com>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Marco Elver <elver@...gle.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Simon Horman <simon.horman@...igine.com>,
        Song Liu <song@...nel.org>,
        Thorsten Leemhuis <linux@...mhuis.info>,
        Tyrel Datwyler <tyreld@...ux.ibm.com>,
        Wyes Karny <wyes.karny@....com>, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [GIT PULL] hardening updates for v6.5-rc1

On Wed, Jun 28, 2023 at 09:29:42AM -0700, Kees Cook wrote:
> > will be completely misued before we have a compiler actually supporting
> > available widely enough that we have it in the usual test bots.
> 
> How do you see it being misused? Your mention of the test bots, I think,
> means you're worried the annotations will go unchecked for valid syntax?

Exactly.

> FWIW, I've got builders with the GCC and Clang patches that should catch
> this.

Are we going to get them wired up for automatic checks somewhere?