Re: [PATCH] md/md-linear: Annotate struct linear_conf with __counted_by

[Song Liu]

On Fri, Sep 15, 2023 at 1:27 PM Gustavo A. R. Silva
<gustavo@xxxxxxxxxxxxxx> wrote:
>
>
>
> On 9/15/23 14:03, 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 linear_conf.
> > Additionally, since the element count member must be set before accessing
> > the annotated flexible array member, move its initialization earlier.
> >
> > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> >
> > Cc: Song Liu <song@xxxxxxxxxx>
> > Cc: linux-raid@xxxxxxxxxxxxxxx
> > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
>
> Reviewed-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>

Applied to md-next. Thanks!
Song