On 9/15/2023 1:06 PM, 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 ath10k_ce_ring.
>
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Kalle Valo <[email protected]>
> Cc: Jeff Johnson <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Signed-off-by: Kees Cook <[email protected]>
Acked-by: Jeff Johnson <[email protected]>
> ---
> drivers/net/wireless/ath/ath10k/ce.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
> index 666ce384a1d8..27367bd64e95 100644
> --- a/drivers/net/wireless/ath/ath10k/ce.h
> +++ b/drivers/net/wireless/ath/ath10k/ce.h
> @@ -110,7 +110,7 @@ struct ath10k_ce_ring {
> struct ce_desc_64 *shadow_base;
>
> /* keep last */
> - void *per_transfer_context[];
> + void *per_transfer_context[] __counted_by(nentries);
> };
>
> struct ath10k_ce_pipe {