linux-kernel - [PATCH] crypto: hisilicon - use kcalloc() instead of kzalloc()

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Message-Id: <20250821142732.34952-1-rongqianfeng@vivo.com>
Date: Thu, 21 Aug 2025 22:27:31 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: Zhiqi Song <songzhiqi1@...wei.com>,
	Longfang Liu <liulongfang@...wei.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Yang Shen <shenyang39@...wei.com>,
	Zhou Wang <wangzhou1@...ilicon.com>,
	linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH] crypto: hisilicon - use kcalloc() instead of kzalloc()

As noted in the kernel documentation [1], open-coded multiplication in
allocator arguments is discouraged because it can lead to integer overflow.

Use devm_kcalloc() to gain built-in overflow protection, making memory
allocation safer when calculating allocation size compared to explicit
multiplication.

Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments #1
Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
 drivers/crypto/hisilicon/hpre/hpre_main.c | 2 +-
 drivers/crypto/hisilicon/sec2/sec_main.c  | 2 +-
 drivers/crypto/hisilicon/zip/zip_main.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/hisilicon/hpre/hpre_main.c b/drivers/crypto/hisilicon/hpre/hpre_main.c
index f5b47e5ff48a..e1e428bdcf8f 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_main.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_main.c
@@ -1171,7 +1171,7 @@ static int hpre_pre_store_cap_reg(struct hisi_qm *qm)
 	size_t i, size;
 
 	size = ARRAY_SIZE(hpre_cap_query_info);
-	hpre_cap = devm_kzalloc(dev, sizeof(*hpre_cap) * size, GFP_KERNEL);
+	hpre_cap = devm_kcalloc(dev, size, sizeof(*hpre_cap), GFP_KERNEL);
 	if (!hpre_cap)
 		return -ENOMEM;
 
diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index 72cf48d1f3ab..10171bc6c05d 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -1169,7 +1169,7 @@ static int sec_pre_store_cap_reg(struct hisi_qm *qm)
 	size_t i, size;
 
 	size = ARRAY_SIZE(sec_cap_query_info);
-	sec_cap = devm_kzalloc(&pdev->dev, sizeof(*sec_cap) * size, GFP_KERNEL);
+	sec_cap = devm_kcalloc(&pdev->dev, size, sizeof(*sec_cap), GFP_KERNEL);
 	if (!sec_cap)
 		return -ENOMEM;
 
diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c
index d8ba23b7cc7d..f0aecb8bc1c9 100644
--- a/drivers/crypto/hisilicon/zip/zip_main.c
+++ b/drivers/crypto/hisilicon/zip/zip_main.c
@@ -1273,7 +1273,7 @@ static int zip_pre_store_cap_reg(struct hisi_qm *qm)
 	size_t i, size;
 
 	size = ARRAY_SIZE(zip_cap_query_info);
-	zip_cap = devm_kzalloc(&pdev->dev, sizeof(*zip_cap) * size, GFP_KERNEL);
+	zip_cap = devm_kcalloc(&pdev->dev, size, sizeof(*zip_cap), GFP_KERNEL);
 	if (!zip_cap)
 		return -ENOMEM;
 
-- 
2.34.1