[PATCH] i3c/master/mipi-i3c-hci: Annotate struct hci_rings_data with __counted_by
Gustavo A. R. Silva
gustavo at embeddedor.com
Sat Sep 23 09:28:52 PDT 2023
On 9/22/23 11:50, 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 hci_rings_data.
>
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Alexandre Belloni <alexandre.belloni at bootlin.com>
> Cc: Nicolas Pitre <npitre at baylibre.com>
> Cc: Len Baker <len.baker at gmx.com>
> Cc: Boris Brezillon <boris.brezillon at collabora.com>
> Cc: linux-i3c 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/i3c/master/mipi-i3c-hci/dma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c
> index 2990ac9eaade..a1ecdfc35641 100644
> --- a/drivers/i3c/master/mipi-i3c-hci/dma.c
> +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
> @@ -139,7 +139,7 @@ struct hci_rh_data {
>
> struct hci_rings_data {
> unsigned int total;
> - struct hci_rh_data headers[];
> + struct hci_rh_data headers[] __counted_by(total);
> };
>
> struct hci_dma_dev_ibi_data {
More information about the linux-i3c
mailing list