[PATCH] mtd: rawnand: meson: Annotate struct meson_nfc_nand_chip with __counted_by

[Gustavo A. R. Silva]

On 9/15/23 14:12, 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 meson_nfc_nand_chip.
> 
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> 
> Cc: Liang Yang <liang.yang at amlogic.com>
> Cc: Miquel Raynal <miquel.raynal at bootlin.com>
> Cc: Richard Weinberger <richard at nod.at>
> Cc: Vignesh Raghavendra <vigneshr at ti.com>
> Cc: Neil Armstrong <neil.armstrong at linaro.org>
> Cc: Kevin Hilman <khilman at baylibre.com>
> Cc: Jerome Brunet <jbrunet at baylibre.com>
> Cc: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
> Cc: linux-mtd at lists.infradead.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-amlogic at lists.infradead.org
> Signed-off-by: Kees Cook <keescook at chromium.org>

Reviewed-by: Gustavo A. R. Silva <gustavoars at kernel.org>

Thanks
-- 
Gustavo

> ---
>   drivers/mtd/nand/raw/meson_nand.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
> index 25e3c1cb605e..378f28ce6a74 100644
> --- a/drivers/mtd/nand/raw/meson_nand.c
> +++ b/drivers/mtd/nand/raw/meson_nand.c
> @@ -128,7 +128,7 @@ struct meson_nfc_nand_chip {
>   	u8 *data_buf;
>   	__le64 *info_buf;
>   	u32 nsels;
> -	u8 sels[];
> +	u8 sels[] __counted_by(nsels);
>   };
>   
>   struct meson_nand_ecc {