linux-kernel - [PATCH v2] pinctrl: nomadik: Use kmemdup_array instead of kmemdup for multiple allocation

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Message-Id: <20240826074037.2313468-1-yujiaoliang@vivo.com>
Date: Mon, 26 Aug 2024 15:40:37 +0800
From: Yu Jiaoliang <yujiaoliang@...o.com>
To: Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com
Subject: [PATCH v2] pinctrl: nomadik: Use kmemdup_array instead of kmemdup for multiple allocation

Let the kememdup_array() take care about multiplication and possible
overflows.

Signed-off-by: Yu Jiaoliang <yujiaoliang@...o.com>
---
 drivers/pinctrl/nomadik/pinctrl-abx500.c  | 3 +--
 drivers/pinctrl/nomadik/pinctrl-nomadik.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c
index 47f62c89955a..68750b6f8e57 100644
--- a/drivers/pinctrl/nomadik/pinctrl-abx500.c
+++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c
@@ -716,8 +716,7 @@ static int abx500_dt_add_map_configs(struct pinctrl_map **map,
 	if (*num_maps == *reserved_maps)
 		return -ENOSPC;
 
-	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
-			      GFP_KERNEL);
+	dup_configs = kmemdup_array(configs, num_configs, sizeof(*dup_configs), GFP_KERNEL);
 	if (!dup_configs)
 		return -ENOMEM;
 
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
index fa78d5ecc685..f4f10c60c1d2 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
@@ -601,8 +601,7 @@ static int nmk_dt_add_map_configs(struct pinctrl_map **map,
 	if (*num_maps == *reserved_maps)
 		return -ENOSPC;
 
-	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
-			      GFP_KERNEL);
+	dup_configs = kmemdup_array(configs, num_configs, sizeof(*dup_configs), GFP_KERNEL);
 	if (!dup_configs)
 		return -ENOMEM;
 
-- 
2.34.1