linux-hardening - [PATCH 2/2] wifi: ath12k: annotate channel of struct ath12k_wmi_scan_chan_list_arg with __counted

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Message-ID: <20241021143419.587716-2-dmantipov@yandex.ru>
Date: Mon, 21 Oct 2024 17:34:19 +0300
From: Dmitry Antipov <dmantipov@...dex.ru>
To: Jeff Johnson <jjohnson@...nel.org>
Cc: Kalle Valo <kvalo@...nel.org>,
	Kees Cook <kees@...nel.org>,
	linux-hardening@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	lvc-project@...uxtesting.org,
	Dmitry Antipov <dmantipov@...dex.ru>
Subject: [PATCH 2/2] wifi: ath12k: annotate channel of struct ath12k_wmi_scan_chan_list_arg with __counted_by

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.

Signed-off-by: Dmitry Antipov <dmantipov@...dex.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 {
-- 
2.47.0