[PATCH] mtd: rawnand: atmel: Annotate struct atmel_nand 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 atmel_nand.
> 
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> 
> Cc: Tudor Ambarus <tudor.ambarus at linaro.org>
> Cc: Miquel Raynal <miquel.raynal at bootlin.com>
> Cc: Richard Weinberger <richard at nod.at>
> Cc: Vignesh Raghavendra <vigneshr at ti.com>
> Cc: Nicolas Ferre <nicolas.ferre at microchip.com>
> Cc: Alexandre Belloni <alexandre.belloni at bootlin.com>
> Cc: Claudiu Beznea <claudiu.beznea at tuxon.dev>
> Cc: linux-mtd at lists.infradead.org
> Cc: linux-arm-kernel 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/atmel/nand-controller.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
> index 3f494f7c7ecb..4cb478bbee4a 100644
> --- a/drivers/mtd/nand/raw/atmel/nand-controller.c
> +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
> @@ -165,7 +165,7 @@ struct atmel_nand {
>   	struct atmel_pmecc_user *pmecc;
>   	struct gpio_desc *cdgpio;
>   	int numcs;
> -	struct atmel_nand_cs cs[];
> +	struct atmel_nand_cs cs[] __counted_by(numcs);
>   };
>   
>   static inline struct atmel_nand *to_atmel_nand(struct nand_chip *chip)