linux-hardening - Re: [PATCH] video: fbdev: mmp: Annotate struct mmphw_ctrl with __counted

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Date: Sat, 23 Sep 2023 20:37:16 +0200
From: Helge Deller <deller@....de>
To: "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
 Kees Cook <keescook@...omium.org>
Cc: linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 Nathan Chancellor <nathan@...nel.org>,
 Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>,
 linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH] video: fbdev: mmp: Annotate struct mmphw_ctrl with
 __counted_by

On 9/23/23 18:33, Gustavo A. R. Silva wrote:
> On 9/22/23 11:51, 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 checking 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 mmphw_ctrl.
>>
>> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>>
>> Cc: Helge Deller <deller@....de>
>> Cc: linux-fbdev@...r.kernel.org
>> Cc: dri-devel@...ts.freedesktop.org
>> Signed-off-by: Kees Cook <keescook@...omium.org>
>
> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Both fbdev patches applied to fbdev git tree.

Thank you Kees!

Helge