Re: [PATCH] gpiolib: cdev: Annotate struct linereq with __counted_by

From: Andy Shevchenko
Date: Mon Sep 25 2023 - 02:54:14 EST


On Fri, Sep 22, 2023 at 10:52:03AM -0700, 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 linereq.
> Additionally, since the element count member must be set before accessing
> the annotated flexible array member, move its initialization earlier.

Ah, hadn't taken into account in my patch, so, Bart, feel free to ignore mine
and apply this one.

Reviewed-by: Andy Shevchenko <andy@xxxxxxxxxx>

--
With Best Regards,
Andy Shevchenko