linux-hardening - [PATCH 1/2] wifi: ath12k: annotate skb of struct ath12k_ce_ring with __counted

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Message-ID: <20241021143419.587716-1-dmantipov@yandex.ru>
Date: Mon, 21 Oct 2024 17:34:18 +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 1/2] wifi: ath12k: annotate skb of struct ath12k_ce_ring with __counted_by

Accorind to 'ath12k_ce_alloc_ring()', annotate flexible array
member 'skb' of 'struct ath12k_ce_ring' with '__counted_by()'
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/ce.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/ce.h b/drivers/net/wireless/ath/ath12k/ce.h
index 857bc5f9e946..6967e3891030 100644
--- a/drivers/net/wireless/ath/ath12k/ce.h
+++ b/drivers/net/wireless/ath/ath12k/ce.h
@@ -135,7 +135,7 @@ struct ath12k_ce_ring {
 	u32 hal_ring_id;
 
 	/* keep last */
-	struct sk_buff *skb[];
+	struct sk_buff *skb[] __counted_by(nentries);
 };
 
 struct ath12k_ce_pipe {
-- 
2.47.0