[lvc-project] [PATCH 2/2] wifi: ath12k: annotate channel of struct ath12k_wmi_scan_chan_list_arg with __counted_by
Gustavo A. R. Silva
gustavo at embeddedor.com
Thu Oct 24 00:43:15 MSK 2024
On 21/10/24 08:34, Dmitry Antipov wrote:
> According to 'ath12k_reg_update_chan_list()', annotate flexible
> array member 'channel' of 'struct ath12k_wmi_scan_chan_list_arg'
> with '__counted_by()' attribute to improve runtime bounds checking
> when CONFIG_UBSAN_BOUNDS is enabled. Compile tested only.
It seems you didn't[1] actually build-test this changes. :/
-Gustavo
[1] https://lore.kernel.org/linux-hardening/202410231916.Wjn5HeB6-lkp@intel.com/
>
> Signed-off-by: Dmitry Antipov <dmantipov at yandex.ru>
> ---
> drivers/net/wireless/ath/ath12k/wmi.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h
> index 6a913f9b8315..9a6e28142754 100644
> --- a/drivers/net/wireless/ath/ath12k/wmi.h
> +++ b/drivers/net/wireless/ath/ath12k/wmi.h
> @@ -3746,7 +3746,7 @@ struct wmi_stop_scan_cmd {
> struct ath12k_wmi_scan_chan_list_arg {
> u32 pdev_id;
> u16 nallchans;
> - struct ath12k_wmi_channel_arg channel[];
> + struct ath12k_wmi_channel_arg channel[] __counted_by(nallchains);
> };
>
> struct wmi_scan_chan_list_cmd {
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