linux-kernel - Re: [PATCH] i3c: dw: Annotate struct dw_i3c_xfer with __counted

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Date:   Fri, 22 Sep 2023 11:48:11 -0700
From:   Jeremy Kerr <jk@...econstruct.com.au>
To:     Kees Cook <keescook@...omium.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Joel Stanley <joel@....id.au>, linux-i3c@...ts.infradead.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Matt Johnston <matt@...econstruct.com.au>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Jack Chen <zenghuchen@...gle.com>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] i3c: dw: Annotate struct dw_i3c_xfer with __counted_by

Hi Kees,

> 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).

Nice!

Reviewed-by: Jeremy Kerr <jk@...econstruct.com.au>

Cheers,


Jeremy