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Date: Thu, 5 Oct 2023 17:41:09 +0200
From: Peter Oberparleiter <>
To: Kees Cook <>,
        Andrew Morton <>
Cc: Nathan Chancellor <>,
        Nick Desaulniers <>, Tom Rix <>,,,
Subject: Re: [PATCH] gcov: Annotate struct gcov_iterator with __counted_by

On 22.09.2023 19:52, 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 gcov_iterator.
> [1]
> Cc: Peter Oberparleiter <>
> Signed-off-by: Kees Cook <>

Looks good to me!

Reviewed-by: Peter Oberparleiter <>

Andrew, could you add this patch via your tree?

Peter Oberparleiter
Linux on IBM Z Development - IBM Germany R&D

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