linux-hardening - [PATCH -next] dmaengine: Loongson1: Annotate struct ls1x_dma_chan with __counted

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Message-ID: <20240904014803.2034939-1-lihongbo22@huawei.com>
Date: Wed, 4 Sep 2024 09:48:03 +0800
From: Hongbo Li <lihongbo22@...wei.com>
To: <keguang.zhang@...il.com>, <vkoul@...nel.org>, <kees@...nel.org>,
	<gustavoars@...nel.org>
CC: <linux-mips@...r.kernel.org>, <dmaengine@...r.kernel.org>,
	<linux-hardening@...r.kernel.org>, <lihongbo22@...wei.com>
Subject: [PATCH -next] dmaengine: Loongson1: Annotate struct ls1x_dma_chan with __counted_by()

Add the __counted_by compiler attribute to the flexible array member
entries to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.

Signed-off-by: Hongbo Li <lihongbo22@...wei.com>
---
 drivers/dma/loongson1-apb-dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/loongson1-apb-dma.c b/drivers/dma/loongson1-apb-dma.c
index ca43c67a8203..be0dbda84dd2 100644
--- a/drivers/dma/loongson1-apb-dma.c
+++ b/drivers/dma/loongson1-apb-dma.c
@@ -78,7 +78,7 @@ struct ls1x_dma_chan {
 struct ls1x_dma {
 	struct dma_device ddev;
 	unsigned int nr_chans;
-	struct ls1x_dma_chan chan[];
+	struct ls1x_dma_chan chan[] __counted_by(nr_chans);
 };
 
 static irqreturn_t ls1x_dma_irq_handler(int irq, void *data);
-- 
2.34.1